Nulo/qmk_firmware
1
0
Fork 0
Code Releases Activity

Merge pull request #482 from fredizzimo/serial_link

Browse source 
Add serial link library
This commit is contained in:
Jack Humbert 2016-07-06 08:56:57 -04:00 committed by GitHub
commit c6d671e54c
21 changed files with 2374 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
quantum/serial_link/LICENSE Normal file
View file

@ -0,0 +1,21 @@
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

1
quantum/serial_link/README.md Normal file
View file

@ -0,0 +1 @@
# qmk_serial_link

145
quantum/serial_link/protocol/byte_stuffer.c Normal file
View file

@ -0,0 +1,145 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include "serial_link/protocol/byte_stuffer.h"
#include "serial_link/protocol/frame_validator.h"
#include "serial_link/protocol/physical.h"
#include <stdbool.h>
// This implements the "Consistent overhead byte stuffing protocol"
// https://en.wikipedia.org/wiki/Consistent_Overhead_Byte_Stuffing
// http://www.stuartcheshire.org/papers/COBSforToN.pdf
#define MAX_FRAME_SIZE 1024
#define NUM_LINKS 2
typedef struct byte_stuffer_state {
uint16_t next_zero;
uint16_t data_pos;
bool long_frame;
uint8_t data[MAX_FRAME_SIZE];
}byte_stuffer_state_t;
static byte_stuffer_state_t states[NUM_LINKS];
void init_byte_stuffer_state(byte_stuffer_state_t* state) {
state->next_zero = 0;
state->data_pos = 0;
state->long_frame = false;
}
void init_byte_stuffer(void) {
int i;
for (i=0;i<NUM_LINKS;i++) {
init_byte_stuffer_state(&states[i]);
}
}
void byte_stuffer_recv_byte(uint8_t link, uint8_t data) {
byte_stuffer_state_t* state = &states[link];
// Start of a new frame
if (state->next_zero == 0) {
state->next_zero = data;
state->long_frame = data == 0xFF;
state->data_pos = 0;
return;
}
state->next_zero--;
if (data == 0) {
if (state->next_zero == 0) {
// The frame is completed
if (state->data_pos > 0) {
validator_recv_frame(link, state->data, state->data_pos);
}
}
else {
// The frame is invalid, so reset
init_byte_stuffer_state(state);
}
}
else {
if (state->data_pos == MAX_FRAME_SIZE) {
// We exceeded our maximum frame size
// therefore there's nothing else to do than reset to a new frame
state->next_zero = data;
state->long_frame = data == 0xFF;
state->data_pos = 0;
}
else if (state->next_zero == 0) {
if (state->long_frame) {
// This is part of a long frame, so continue
state->next_zero = data;
state->long_frame = data == 0xFF;
}
else {
// Special case for zeroes
state->next_zero = data;
state->data[state->data_pos++] = 0;
}
}
else {
state->data[state->data_pos++] = data;
}
}
}
static void send_block(uint8_t link, uint8_t* start, uint8_t* end, uint8_t num_non_zero) {
send_data(link, &num_non_zero, 1);
if (end > start) {
send_data(link, start, end-start);
}
}
void byte_stuffer_send_frame(uint8_t link, uint8_t* data, uint16_t size) {
const uint8_t zero = 0;
if (size > 0) {
uint16_t num_non_zero = 1;
uint8_t* end = data + size;
uint8_t* start = data;
while (data < end) {
if (num_non_zero == 0xFF) {
// There's more data after big non-zero block
// So send it, and start a new block
send_block(link, start, data, num_non_zero);
start = data;
num_non_zero = 1;
}
else {
if (*data == 0) {
// A zero encountered, so send the block
send_block(link, start, data, num_non_zero);
start = data + 1;
num_non_zero = 1;
}
else {
num_non_zero++;
}
++data;
}
}
send_block(link, start, data, num_non_zero);
send_data(link, &zero, 1);
}
}

34
quantum/serial_link/protocol/byte_stuffer.h Normal file
View file

@ -0,0 +1,34 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#ifndef SERIAL_LINK_BYTE_STUFFER_H
#define SERIAL_LINK_BYTE_STUFFER_H
#include <stdint.h>
void init_byte_stuffer(void);
void byte_stuffer_recv_byte(uint8_t link, uint8_t data);
void byte_stuffer_send_frame(uint8_t link, uint8_t* data, uint16_t size);
#endif

69
quantum/serial_link/protocol/frame_router.c Normal file
View file

@ -0,0 +1,69 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include "serial_link/protocol/frame_router.h"
#include "serial_link/protocol/transport.h"
#include "serial_link/protocol/frame_validator.h"
static bool is_master;
void router_set_master(bool master) {
is_master = master;
}
void route_incoming_frame(uint8_t link, uint8_t* data, uint16_t size){
if (is_master) {
if (link == DOWN_LINK) {
transport_recv_frame(data[size-1], data, size - 1);
}
}
else {
if (link == UP_LINK) {
if (data[size-1] & 1) {
transport_recv_frame(0, data, size - 1);
}
data[size-1] >>= 1;
validator_send_frame(DOWN_LINK, data, size);
}
else {
data[size-1]++;
validator_send_frame(UP_LINK, data, size);
}
}
}
void router_send_frame(uint8_t destination, uint8_t* data, uint16_t size) {
if (destination == 0) {
if (!is_master) {
data[size] = 1;
validator_send_frame(UP_LINK, data, size + 1);
}
}
else {
if (is_master) {
data[size] = destination;
validator_send_frame(DOWN_LINK, data, size + 1);
}
}
}

38
quantum/serial_link/protocol/frame_router.h Normal file
View file

@ -0,0 +1,38 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#ifndef SERIAL_LINK_FRAME_ROUTER_H
#define SERIAL_LINK_FRAME_ROUTER_H
#include <stdint.h>
#include <stdbool.h>
#define UP_LINK 0
#define DOWN_LINK 1
void router_set_master(bool master);
void route_incoming_frame(uint8_t link, uint8_t* data, uint16_t size);
void router_send_frame(uint8_t destination, uint8_t* data, uint16_t size);
#endif

121
quantum/serial_link/protocol/frame_validator.c Normal file
View file

@ -0,0 +1,121 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include "serial_link/protocol/frame_validator.h"
#include "serial_link/protocol/frame_router.h"
#include "serial_link/protocol/byte_stuffer.h"
#include <string.h>
const uint32_t poly8_lookup[256] =
{
0, 0x77073096, 0xEE0E612C, 0x990951BA,
0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
};
static uint32_t crc32_byte(uint8_t *p, uint32_t bytelength)
{
uint32_t crc = 0xffffffff;
while (bytelength-- !=0) crc = poly8_lookup[((uint8_t) crc ^ *(p++))] ^ (crc >> 8);
// return (~crc); also works
return (crc ^ 0xffffffff);
}
void validator_recv_frame(uint8_t link, uint8_t* data, uint16_t size) {
if (size > 4) {
uint32_t frame_crc;
memcpy(&frame_crc, data + size -4, 4);
uint32_t expected_crc = crc32_byte(data, size - 4);
if (frame_crc == expected_crc) {
route_incoming_frame(link, data, size-4);
}
}
}
void validator_send_frame(uint8_t link, uint8_t* data, uint16_t size) {
uint32_t crc = crc32_byte(data, size);
memcpy(data + size, &crc, 4);
byte_stuffer_send_frame(link, data, size + 4);
}

34
quantum/serial_link/protocol/frame_validator.h Normal file
View file

@ -0,0 +1,34 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#ifndef SERIAL_LINK_FRAME_VALIDATOR_H
#define SERIAL_LINK_FRAME_VALIDATOR_H
#include <stdint.h>
void validator_recv_frame(uint8_t link, uint8_t* data, uint16_t size);
// The buffer pointed to by the data needs 4 additional bytes
void validator_send_frame(uint8_t link, uint8_t* data, uint16_t size);
#endif

30
quantum/serial_link/protocol/physical.h Normal file
View file

@ -0,0 +1,30 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#ifndef SERIAL_LINK_PHYSICAL_H
#define SERIAL_LINK_PHYSICAL_H
void send_data(uint8_t link, const uint8_t* data, uint16_t size);
#endif

124
quantum/serial_link/protocol/transport.c Normal file
View file

@ -0,0 +1,124 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include "serial_link/protocol/transport.h"
#include "serial_link/protocol/frame_router.h"
#include "serial_link/protocol/triple_buffered_object.h"
#include <string.h>
#define MAX_REMOTE_OBJECTS 16
static remote_object_t* remote_objects[MAX_REMOTE_OBJECTS];
static uint32_t num_remote_objects = 0;
void add_remote_objects(remote_object_t** _remote_objects, uint32_t _num_remote_objects) {
unsigned int i;
for(i=0;i<_num_remote_objects;i++) {
remote_object_t* obj = _remote_objects[i];
remote_objects[num_remote_objects++] = obj;
if (obj->object_type == MASTER_TO_ALL_SLAVES) {
triple_buffer_object_t* tb = (triple_buffer_object_t*)obj->buffer;
triple_buffer_init(tb);
uint8_t* start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size);
tb = (triple_buffer_object_t*)start;
triple_buffer_init(tb);
}
else if(obj->object_type == MASTER_TO_SINGLE_SLAVE) {
uint8_t* start = obj->buffer;
unsigned int j;
for (j=0;j<NUM_SLAVES;j++) {
triple_buffer_object_t* tb = (triple_buffer_object_t*)start;
triple_buffer_init(tb);
start += LOCAL_OBJECT_SIZE(obj->object_size);
}
triple_buffer_object_t* tb = (triple_buffer_object_t*)start;
triple_buffer_init(tb);
}
else {
uint8_t* start = obj->buffer;
triple_buffer_object_t* tb = (triple_buffer_object_t*)start;
triple_buffer_init(tb);
start += LOCAL_OBJECT_SIZE(obj->object_size);
unsigned int j;
for (j=0;j<NUM_SLAVES;j++) {
tb = (triple_buffer_object_t*)start;
triple_buffer_init(tb);
start += REMOTE_OBJECT_SIZE(obj->object_size);
}
}
}
}
void transport_recv_frame(uint8_t from, uint8_t* data, uint16_t size) {
uint8_t id = data[size-1];
if (id < num_remote_objects) {
remote_object_t* obj = remote_objects[id];
if (obj->object_size == size - 1) {
uint8_t* start;
if (obj->object_type == MASTER_TO_ALL_SLAVES) {
start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size);
}
else if(obj->object_type == SLAVE_TO_MASTER) {
start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size);
start += (from - 1) * REMOTE_OBJECT_SIZE(obj->object_size);
}
else {
start = obj->buffer + NUM_SLAVES * LOCAL_OBJECT_SIZE(obj->object_size);
}
triple_buffer_object_t* tb = (triple_buffer_object_t*)start;
void* ptr = triple_buffer_begin_write_internal(obj->object_size, tb);
memcpy(ptr, data, size - 1);
triple_buffer_end_write_internal(tb);
}
}
}
void update_transport(void) {
unsigned int i;
for(i=0;i<num_remote_objects;i++) {
remote_object_t* obj = remote_objects[i];
if (obj->object_type == MASTER_TO_ALL_SLAVES || obj->object_type == SLAVE_TO_MASTER) {
triple_buffer_object_t* tb = (triple_buffer_object_t*)obj->buffer;
uint8_t* ptr = (uint8_t*)triple_buffer_read_internal(obj->object_size + LOCAL_OBJECT_EXTRA, tb);
if (ptr) {
ptr[obj->object_size] = i;
uint8_t dest = obj->object_type == MASTER_TO_ALL_SLAVES ? 0xFF : 0;
router_send_frame(dest, ptr, obj->object_size + 1);
}
}
else {
uint8_t* start = obj->buffer;
unsigned int j;
for (j=0;j<NUM_SLAVES;j++) {
triple_buffer_object_t* tb = (triple_buffer_object_t*)start;
uint8_t* ptr = (uint8_t*)triple_buffer_read_internal(obj->object_size + LOCAL_OBJECT_EXTRA, tb);
if (ptr) {
ptr[obj->object_size] = i;
uint8_t dest = j + 1;
router_send_frame(dest, ptr, obj->object_size + 1);
}
start += LOCAL_OBJECT_SIZE(obj->object_size);
}
}
}
}

151
quantum/serial_link/protocol/transport.h Normal file
View file

@ -0,0 +1,151 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#ifndef SERIAL_LINK_TRANSPORT_H
#define SERIAL_LINK_TRANSPORT_H
#include "serial_link/protocol/triple_buffered_object.h"
#include "serial_link/system/serial_link.h"
#define NUM_SLAVES 8
#define LOCAL_OBJECT_EXTRA 16
// master -> slave = 1 local(target all), 1 remote object
// slave -> master = 1 local(target 0), multiple remote objects
// master -> single slave (multiple local, target id), 1 remote object
typedef enum {
MASTER_TO_ALL_SLAVES,
MASTER_TO_SINGLE_SLAVE,
SLAVE_TO_MASTER,
} remote_object_type;
typedef struct {
remote_object_type object_type;
uint16_t object_size;
uint8_t buffer[] __attribute__((aligned(4)));
} remote_object_t;
#define REMOTE_OBJECT_SIZE(objectsize) \
(sizeof(triple_buffer_object_t) + objectsize * 3)
#define LOCAL_OBJECT_SIZE(objectsize) \
(sizeof(triple_buffer_object_t) + (objectsize + LOCAL_OBJECT_EXTRA) * 3)
#define REMOTE_OBJECT_HELPER(name, type, num_local, num_remote) \
typedef struct { \
remote_object_t object; \
uint8_t buffer[ \
num_remote * REMOTE_OBJECT_SIZE(sizeof(type)) + \
num_local * LOCAL_OBJECT_SIZE(sizeof(type))]; \
} remote_object_##name##_t;
#define MASTER_TO_ALL_SLAVES_OBJECT(name, type) \
REMOTE_OBJECT_HELPER(name, type, 1, 1) \
remote_object_##name##_t remote_object_##name = { \
.object = { \
.object_type = MASTER_TO_ALL_SLAVES, \
.object_size = sizeof(type), \
} \
}; \
type* begin_write_##name(void) { \
remote_object_t* obj = (remote_object_t*)&remote_object_##name; \
triple_buffer_object_t* tb = (triple_buffer_object_t*)obj->buffer; \
return (type*)triple_buffer_begin_write_internal(sizeof(type) + LOCAL_OBJECT_EXTRA, tb); \
}\
void end_write_##name(void) { \
remote_object_t* obj = (remote_object_t*)&remote_object_##name; \
triple_buffer_object_t* tb = (triple_buffer_object_t*)obj->buffer; \
triple_buffer_end_write_internal(tb); \
signal_data_written(); \
}\
type* read_##name(void) { \
remote_object_t* obj = (remote_object_t*)&remote_object_##name; \
uint8_t* start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size);\
triple_buffer_object_t* tb = (triple_buffer_object_t*)start; \
return triple_buffer_read_internal(obj->object_size, tb); \
}
#define MASTER_TO_SINGLE_SLAVE_OBJECT(name, type) \
REMOTE_OBJECT_HELPER(name, type, NUM_SLAVES, 1) \
remote_object_##name##_t remote_object_##name = { \
.object = { \
.object_type = MASTER_TO_SINGLE_SLAVE, \
.object_size = sizeof(type), \
} \
}; \
type* begin_write_##name(uint8_t slave) { \
remote_object_t* obj = (remote_object_t*)&remote_object_##name; \
uint8_t* start = obj->buffer;\
start += slave * LOCAL_OBJECT_SIZE(obj->object_size); \
triple_buffer_object_t* tb = (triple_buffer_object_t*)start; \
return (type*)triple_buffer_begin_write_internal(sizeof(type) + LOCAL_OBJECT_EXTRA, tb); \
}\
void end_write_##name(uint8_t slave) { \
remote_object_t* obj = (remote_object_t*)&remote_object_##name; \
uint8_t* start = obj->buffer;\
start += slave * LOCAL_OBJECT_SIZE(obj->object_size); \
triple_buffer_object_t* tb = (triple_buffer_object_t*)start; \
triple_buffer_end_write_internal(tb); \
signal_data_written(); \
}\
type* read_##name() { \
remote_object_t* obj = (remote_object_t*)&remote_object_##name; \
uint8_t* start = obj->buffer + NUM_SLAVES * LOCAL_OBJECT_SIZE(obj->object_size);\
triple_buffer_object_t* tb = (triple_buffer_object_t*)start; \
return triple_buffer_read_internal(obj->object_size, tb); \
}
#define SLAVE_TO_MASTER_OBJECT(name, type) \
REMOTE_OBJECT_HELPER(name, type, 1, NUM_SLAVES) \
remote_object_##name##_t remote_object_##name = { \
.object = { \
.object_type = SLAVE_TO_MASTER, \
.object_size = sizeof(type), \
} \
}; \
type* begin_write_##name(void) { \
remote_object_t* obj = (remote_object_t*)&remote_object_##name; \
triple_buffer_object_t* tb = (triple_buffer_object_t*)obj->buffer; \
return (type*)triple_buffer_begin_write_internal(sizeof(type) + LOCAL_OBJECT_EXTRA, tb); \
}\
void end_write_##name(void) { \
remote_object_t* obj = (remote_object_t*)&remote_object_##name; \
triple_buffer_object_t* tb = (triple_buffer_object_t*)obj->buffer; \
triple_buffer_end_write_internal(tb); \
signal_data_written(); \
}\
type* read_##name(uint8_t slave) { \
remote_object_t* obj = (remote_object_t*)&remote_object_##name; \
uint8_t* start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size);\
start+=slave * REMOTE_OBJECT_SIZE(obj->object_size); \
triple_buffer_object_t* tb = (triple_buffer_object_t*)start; \
return triple_buffer_read_internal(obj->object_size, tb); \
}
#define REMOTE_OBJECT(name) (remote_object_t*)&remote_object_##name
void add_remote_objects(remote_object_t** remote_objects, uint32_t num_remote_objects);
void transport_recv_frame(uint8_t from, uint8_t* data, uint16_t size);
void update_transport(void);
#endif

78
quantum/serial_link/protocol/triple_buffered_object.c Normal file
View file

@ -0,0 +1,78 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include "serial_link/protocol/triple_buffered_object.h"
#include "serial_link/system/serial_link.h"
#include <stdbool.h>
#include <stddef.h>
#define GET_READ_INDEX() object->state & 3
#define GET_WRITE_INDEX() (object->state >> 2) & 3
#define GET_SHARED_INDEX() (object->state >> 4) & 3
#define GET_DATA_AVAILABLE() (object->state >> 6) & 1
#define SET_READ_INDEX(i) object->state = ((object->state & ~3) | i)
#define SET_WRITE_INDEX(i) object->state = ((object->state & ~(3 << 2)) | (i << 2))
#define SET_SHARED_INDEX(i) object->state = ((object->state & ~(3 << 4)) | (i << 4))
#define SET_DATA_AVAILABLE(i) object->state = ((object->state & ~(1 << 6)) | (i << 6))
void triple_buffer_init(triple_buffer_object_t* object) {
object->state = 0;
SET_WRITE_INDEX(0);
SET_READ_INDEX(1);
SET_SHARED_INDEX(2);
SET_DATA_AVAILABLE(0);
}
void* triple_buffer_read_internal(uint16_t object_size, triple_buffer_object_t* object) {
serial_link_lock();
if (GET_DATA_AVAILABLE()) {
uint8_t shared_index = GET_SHARED_INDEX();
uint8_t read_index = GET_READ_INDEX();
SET_READ_INDEX(shared_index);
SET_SHARED_INDEX(read_index);
SET_DATA_AVAILABLE(false);
serial_link_unlock();
return object->buffer + object_size * shared_index;
}
else {
serial_link_unlock();
return NULL;
}
}
void* triple_buffer_begin_write_internal(uint16_t object_size, triple_buffer_object_t* object) {
uint8_t write_index = GET_WRITE_INDEX();
return object->buffer + object_size * write_index;
}
void triple_buffer_end_write_internal(triple_buffer_object_t* object) {
serial_link_lock();
uint8_t shared_index = GET_SHARED_INDEX();
uint8_t write_index = GET_WRITE_INDEX();
SET_SHARED_INDEX(write_index);
SET_WRITE_INDEX(shared_index);
SET_DATA_AVAILABLE(true);
serial_link_unlock();
}

51
quantum/serial_link/protocol/triple_buffered_object.h Normal file
View file

@ -0,0 +1,51 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#ifndef SERIAL_LINK_TRIPLE_BUFFERED_OBJECT_H
#define SERIAL_LINK_TRIPLE_BUFFERED_OBJECT_H
#include <stdint.h>
typedef struct {
uint8_t state;
uint8_t buffer[] __attribute__((aligned(4)));
}triple_buffer_object_t;
void triple_buffer_init(triple_buffer_object_t* object);
#define triple_buffer_begin_write(object) \
(typeof(*object.buffer[0])*)triple_buffer_begin_write_internal(sizeof(*object.buffer[0]), (triple_buffer_object_t*)object)
#define triple_buffer_end_write(object) \
triple_buffer_end_write_internal((triple_buffer_object_t*)object)
#define triple_buffer_read(object) \
(typeof(*object.buffer[0])*)triple_buffer_read_internal(sizeof(*object.buffer[0]), (triple_buffer_object_t*)object)
void* triple_buffer_begin_write_internal(uint16_t object_size, triple_buffer_object_t* object);
void triple_buffer_end_write_internal(triple_buffer_object_t* object);
void* triple_buffer_read_internal(uint16_t object_size, triple_buffer_object_t* object);
#endif

265
quantum/serial_link/system/serial_link.c Normal file
View file

@ -0,0 +1,265 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include "report.h"
#include "host_driver.h"
#include "serial_link/system/serial_link.h"
#include "hal.h"
#include "serial_link/protocol/byte_stuffer.h"
#include "serial_link/protocol/transport.h"
#include "serial_link/protocol/frame_router.h"
#include "matrix.h"
#include <stdbool.h>
#include "print.h"
#include "config.h"
static event_source_t new_data_event;
static bool serial_link_connected;
static bool is_master = false;
static uint8_t keyboard_leds(void);
static void send_keyboard(report_keyboard_t *report);
static void send_mouse(report_mouse_t *report);
static void send_system(uint16_t data);
static void send_consumer(uint16_t data);
host_driver_t serial_driver = {
keyboard_leds,
send_keyboard,
send_mouse,
send_system,
send_consumer
};
// Define these in your Config.h file
#ifndef SERIAL_LINK_BAUD
#error "Serial link baud is not set"
#endif
#ifndef SERIAL_LINK_THREAD_PRIORITY
#error "Serial link thread priority not set"
#endif
static SerialConfig config = {
.sc_speed = SERIAL_LINK_BAUD
};
//#define DEBUG_LINK_ERRORS
static uint32_t read_from_serial(SerialDriver* driver, uint8_t link) {
const uint32_t buffer_size = 16;
uint8_t buffer[buffer_size];
uint32_t bytes_read = sdAsynchronousRead(driver, buffer, buffer_size);
uint8_t* current = buffer;
uint8_t* end = current + bytes_read;
while(current < end) {
byte_stuffer_recv_byte(link, *current);
current++;
}
return bytes_read;
}
static void print_error(char* str, eventflags_t flags, SerialDriver* driver) {
#ifdef DEBUG_LINK_ERRORS
if (flags & SD_PARITY_ERROR) {
print(str);
print(" Parity error\n");
}
if (flags & SD_FRAMING_ERROR) {
print(str);
print(" Framing error\n");
}
if (flags & SD_OVERRUN_ERROR) {
print(str);
uint32_t size = qSpaceI(&(driver->iqueue));
xprintf(" Overrun error, queue size %d\n", size);
}
if (flags & SD_NOISE_ERROR) {
print(str);
print(" Noise error\n");
}
if (flags & SD_BREAK_DETECTED) {
print(str);
print(" Break detected\n");
}
#else
(void)str;
(void)flags;
(void)driver;
#endif
}
bool is_serial_link_master(void) {
return is_master;
}
// TODO: Optimize the stack size, this is probably way too big
static THD_WORKING_AREA(serialThreadStack, 1024);
static THD_FUNCTION(serialThread, arg) {
(void)arg;
event_listener_t new_data_listener;
event_listener_t sd1_listener;
event_listener_t sd2_listener;
chEvtRegister(&new_data_event, &new_data_listener, 0);
eventflags_t events = CHN_INPUT_AVAILABLE
| SD_PARITY_ERROR | SD_FRAMING_ERROR | SD_OVERRUN_ERROR | SD_NOISE_ERROR | SD_BREAK_DETECTED;
chEvtRegisterMaskWithFlags(chnGetEventSource(&SD1),
&sd1_listener,
EVENT_MASK(1),
events);
chEvtRegisterMaskWithFlags(chnGetEventSource(&SD2),
&sd2_listener,
EVENT_MASK(2),
events);
bool need_wait = false;
while(true) {
eventflags_t flags1 = 0;
eventflags_t flags2 = 0;
if (need_wait) {
eventmask_t mask = chEvtWaitAnyTimeout(ALL_EVENTS, MS2ST(1000));
if (mask & EVENT_MASK(1)) {
flags1 = chEvtGetAndClearFlags(&sd1_listener);
print_error("DOWNLINK", flags1, &SD1);
}
if (mask & EVENT_MASK(2)) {
flags2 = chEvtGetAndClearFlags(&sd2_listener);
print_error("UPLINK", flags2, &SD2);
}
}
// Always stay as master, even if the USB goes into sleep mode
is_master |= usbGetDriverStateI(&USBD1) == USB_ACTIVE;
router_set_master(is_master);
need_wait = true;
need_wait &= read_from_serial(&SD2, UP_LINK) == 0;
need_wait &= read_from_serial(&SD1, DOWN_LINK) == 0;
update_transport();
}
}
void send_data(uint8_t link, const uint8_t* data, uint16_t size) {
if (link == DOWN_LINK) {
sdWrite(&SD1, data, size);
}
else {
sdWrite(&SD2, data, size);
}
}
static systime_t last_update = 0;
typedef struct {
matrix_row_t rows[MATRIX_ROWS];
} matrix_object_t;
static matrix_object_t last_matrix = {};
SLAVE_TO_MASTER_OBJECT(keyboard_matrix, matrix_object_t);
MASTER_TO_ALL_SLAVES_OBJECT(serial_link_connected, bool);
static remote_object_t* remote_objects[] = {
REMOTE_OBJECT(serial_link_connected),
REMOTE_OBJECT(keyboard_matrix),
};
void init_serial_link(void) {
serial_link_connected = false;
init_serial_link_hal();
add_remote_objects(remote_objects, sizeof(remote_objects)/sizeof(remote_object_t*));
init_byte_stuffer();
sdStart(&SD1, &config);
sdStart(&SD2, &config);
chEvtObjectInit(&new_data_event);
(void)chThdCreateStatic(serialThreadStack, sizeof(serialThreadStack),
SERIAL_LINK_THREAD_PRIORITY, serialThread, NULL);
}
void matrix_set_remote(matrix_row_t* rows, uint8_t index);
void serial_link_update(void) {
if (read_serial_link_connected()) {
serial_link_connected = true;
}
matrix_object_t matrix;
bool changed = false;
for(uint8_t i=0;i<MATRIX_ROWS;i++) {
matrix.rows[i] = matrix_get_row(i);
changed |= matrix.rows[i] != last_matrix.rows[i];
}
systime_t current_time = chVTGetSystemTimeX();
systime_t delta = current_time - last_update;
if (changed || delta > US2ST(1000)) {
last_update = current_time;
last_matrix = matrix;
matrix_object_t* m = begin_write_keyboard_matrix();
for(uint8_t i=0;i<MATRIX_ROWS;i++) {
m->rows[i] = matrix.rows[i];
}
end_write_keyboard_matrix();
*begin_write_serial_link_connected() = true;
end_write_serial_link_connected();
}
matrix_object_t* m = read_keyboard_matrix(0);
if (m) {
matrix_set_remote(m->rows, 0);
}
}
void signal_data_written(void) {
chEvtBroadcast(&new_data_event);
}
bool is_serial_link_connected(void) {
return serial_link_connected;
}
host_driver_t* get_serial_link_driver(void) {
return &serial_driver;
}
// NOTE: The driver does nothing, because the master handles everything
uint8_t keyboard_leds(void) {
return 0;
}
void send_keyboard(report_keyboard_t *report) {
(void)report;
}
void send_mouse(report_mouse_t *report) {
(void)report;
}
void send_system(uint16_t data) {
(void)data;
}
void send_consumer(uint16_t data) {
(void)data;
}

63
quantum/serial_link/system/serial_link.h Normal file
View file

@ -0,0 +1,63 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#ifndef SERIAL_LINK_H
#define SERIAL_LINK_H
#include "host_driver.h"
#include <stdbool.h>
void init_serial_link(void);
void init_serial_link_hal(void);
bool is_serial_link_connected(void);
bool is_serial_link_master(void);
host_driver_t* get_serial_link_driver(void);
void serial_link_update(void);
#if defined(PROTOCOL_CHIBIOS)
#include "ch.h"
static inline void serial_link_lock(void) {
chSysLock();
}
static inline void serial_link_unlock(void) {
chSysUnlock();
}
void signal_data_written(void);
#else
inline void serial_link_lock(void) {
}
inline void serial_link_unlock(void) {
}
void signal_data_written(void);
#endif
#endif

61
quantum/serial_link/tests/Makefile Normal file
View file

@ -0,0 +1,61 @@
# The MIT License (MIT)
#
# Copyright (c) 2016 Fred Sundvik
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
CC = gcc
CFLAGS =
INCLUDES = -I. -I../../
LDFLAGS = -L$(BUILDDIR)/cgreen/build-c/src -shared
LDLIBS = -lcgreen
UNITOBJ = $(BUILDDIR)/serialtest/unitobj
DEPDIR = $(BUILDDIR)/serialtest/unit.d
UNITTESTS = $(BUILDDIR)/serialtest/unittests
DEPFLAGS = -MT $@ -MMD -MP -MF $(DEPDIR)/$*.Td
EXT = .so
UNAME := $(shell uname)
ifneq (, $(findstring MINGW, $(UNAME)))
EXT = .dll
endif
ifneq (, $(findstring CYGWIN, $(UNAME)))
EXT = .dll
endif
SRC = $(wildcard *.c)
TESTFILES = $(patsubst %.c, $(UNITTESTS)/%$(EXT), $(SRC))
$(shell mkdir -p $(DEPDIR) >/dev/null)
test: $(TESTFILES)
@$(BUILDDIR)/cgreen/build-c/tools/cgreen-runner --color $(TESTFILES)
$(UNITTESTS)/%$(EXT): $(UNITOBJ)/%.o
@mkdir -p $(UNITTESTS)
$(CC) $(LDFLAGS) -o $@ $^ $(LDLIBS)
$(UNITOBJ)/%.o : %.c
$(UNITOBJ)/%.o: %.c $(DEPDIR)/%.d
@mkdir -p $(UNITOBJ)
$(CC) $(CFLAGS) $(DEPFLAGS) $(INCLUDES) -c $< -o $@
@mv -f $(DEPDIR)/$*.Td $(DEPDIR)/$*.d
$(DEPDIR)/%.d: ;
.PRECIOUS: $(DEPDIR)/%.d
-include $(patsubst %,$(DEPDIR)/%.d,$(basename $(SRC)))

506
quantum/serial_link/tests/byte_stuffer_tests.c Normal file
View file

@ -0,0 +1,506 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include <cgreen/cgreen.h>
#include <cgreen/mocks.h>
#include "serial_link/protocol/byte_stuffer.h"
#include "serial_link/protocol/byte_stuffer.c"
#include "serial_link/protocol/frame_validator.h"
#include "serial_link/protocol/physical.h"
static uint8_t sent_data[MAX_FRAME_SIZE*2];
static uint16_t sent_data_size;
Describe(ByteStuffer);
BeforeEach(ByteStuffer) {
init_byte_stuffer();
sent_data_size = 0;
}
AfterEach(ByteStuffer) {}
void validator_recv_frame(uint8_t link, uint8_t* data, uint16_t size) {
mock(data, size);
}
void send_data(uint8_t link, const uint8_t* data, uint16_t size) {
memcpy(sent_data + sent_data_size, data, size);
sent_data_size += size;
}
Ensure(ByteStuffer, receives_no_frame_for_a_single_zero_byte) {
never_expect(validator_recv_frame);
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, receives_no_frame_for_a_single_FF_byte) {
never_expect(validator_recv_frame);
byte_stuffer_recv_byte(0, 0xFF);
}
Ensure(ByteStuffer, receives_no_frame_for_a_single_random_byte) {
never_expect(validator_recv_frame);
byte_stuffer_recv_byte(0, 0x4A);
}
Ensure(ByteStuffer, receives_no_frame_for_a_zero_length_frame) {
never_expect(validator_recv_frame);
byte_stuffer_recv_byte(0, 1);
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, receives_single_byte_valid_frame) {
uint8_t expected[] = {0x37};
expect(validator_recv_frame,
when(size, is_equal_to(1)),
when(data, is_equal_to_contents_of(expected, 1))
);
byte_stuffer_recv_byte(0, 2);
byte_stuffer_recv_byte(0, 0x37);
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, receives_three_bytes_valid_frame) {
uint8_t expected[] = {0x37, 0x99, 0xFF};
expect(validator_recv_frame,
when(size, is_equal_to(3)),
when(data, is_equal_to_contents_of(expected, 3))
);
byte_stuffer_recv_byte(0, 4);
byte_stuffer_recv_byte(0, 0x37);
byte_stuffer_recv_byte(0, 0x99);
byte_stuffer_recv_byte(0, 0xFF);
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, receives_single_zero_valid_frame) {
uint8_t expected[] = {0};
expect(validator_recv_frame,
when(size, is_equal_to(1)),
when(data, is_equal_to_contents_of(expected, 1))
);
byte_stuffer_recv_byte(0, 1);
byte_stuffer_recv_byte(0, 1);
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, receives_valid_frame_with_zeroes) {
uint8_t expected[] = {5, 0, 3, 0};
expect(validator_recv_frame,
when(size, is_equal_to(4)),
when(data, is_equal_to_contents_of(expected, 4))
);
byte_stuffer_recv_byte(0, 2);
byte_stuffer_recv_byte(0, 5);
byte_stuffer_recv_byte(0, 2);
byte_stuffer_recv_byte(0, 3);
byte_stuffer_recv_byte(0, 1);
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, receives_two_valid_frames) {
uint8_t expected1[] = {5, 0};
uint8_t expected2[] = {3};
expect(validator_recv_frame,
when(size, is_equal_to(2)),
when(data, is_equal_to_contents_of(expected1, 2))
);
expect(validator_recv_frame,
when(size, is_equal_to(1)),
when(data, is_equal_to_contents_of(expected2, 1))
);
byte_stuffer_recv_byte(1, 2);
byte_stuffer_recv_byte(1, 5);
byte_stuffer_recv_byte(1, 1);
byte_stuffer_recv_byte(1, 0);
byte_stuffer_recv_byte(1, 2);
byte_stuffer_recv_byte(1, 3);
byte_stuffer_recv_byte(1, 0);
}
Ensure(ByteStuffer, receives_valid_frame_after_unexpected_zero) {
uint8_t expected[] = {5, 7};
expect(validator_recv_frame,
when(size, is_equal_to(2)),
when(data, is_equal_to_contents_of(expected, 2))
);
byte_stuffer_recv_byte(1, 3);
byte_stuffer_recv_byte(1, 1);
byte_stuffer_recv_byte(1, 0);
byte_stuffer_recv_byte(1, 3);
byte_stuffer_recv_byte(1, 5);
byte_stuffer_recv_byte(1, 7);
byte_stuffer_recv_byte(1, 0);
}
Ensure(ByteStuffer, receives_valid_frame_after_unexpected_non_zero) {
uint8_t expected[] = {5, 7};
expect(validator_recv_frame,
when(size, is_equal_to(2)),
when(data, is_equal_to_contents_of(expected, 2))
);
byte_stuffer_recv_byte(0, 2);
byte_stuffer_recv_byte(0, 9);
byte_stuffer_recv_byte(0, 4); // This should have been zero
byte_stuffer_recv_byte(0, 0);
byte_stuffer_recv_byte(0, 3);
byte_stuffer_recv_byte(0, 5);
byte_stuffer_recv_byte(0, 7);
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, receives_a_valid_frame_with_over254_non_zeroes_and_then_end_of_frame) {
uint8_t expected[254];
int i;
for (i=0;i<254;i++) {
expected[i] = i + 1;
}
expect(validator_recv_frame,
when(size, is_equal_to(254)),
when(data, is_equal_to_contents_of(expected, 254))
);
byte_stuffer_recv_byte(0, 0xFF);
for (i=0;i<254;i++) {
byte_stuffer_recv_byte(0, i+1);
}
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, receives_a_valid_frame_with_over254_non_zeroes_next_byte_is_non_zero) {
uint8_t expected[255];
int i;
for (i=0;i<254;i++) {
expected[i] = i + 1;
}
expected[254] = 7;
expect(validator_recv_frame,
when(size, is_equal_to(255)),
when(data, is_equal_to_contents_of(expected, 255))
);
byte_stuffer_recv_byte(0, 0xFF);
for (i=0;i<254;i++) {
byte_stuffer_recv_byte(0, i+1);
}
byte_stuffer_recv_byte(0, 2);
byte_stuffer_recv_byte(0, 7);
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, receives_a_valid_frame_with_over254_non_zeroes_next_byte_is_zero) {
uint8_t expected[255];
int i;
for (i=0;i<254;i++) {
expected[i] = i + 1;
}
expected[254] = 0;
expect(validator_recv_frame,
when(size, is_equal_to(255)),
when(data, is_equal_to_contents_of(expected, 255))
);
byte_stuffer_recv_byte(0, 0xFF);
for (i=0;i<254;i++) {
byte_stuffer_recv_byte(0, i+1);
}
byte_stuffer_recv_byte(0, 1);
byte_stuffer_recv_byte(0, 1);
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, receives_two_long_frames_and_some_more) {
uint8_t expected[515];
int i;
int j;
for (j=0;j<2;j++) {
for (i=0;i<254;i++) {
expected[i+254*j] = i + 1;
}
}
for (i=0;i<7;i++) {
expected[254*2+i] = i + 1;
}
expect(validator_recv_frame,
when(size, is_equal_to(515)),
when(data, is_equal_to_contents_of(expected, 510))
);
byte_stuffer_recv_byte(0, 0xFF);
for (i=0;i<254;i++) {
byte_stuffer_recv_byte(0, i+1);
}
byte_stuffer_recv_byte(0, 0xFF);
for (i=0;i<254;i++) {
byte_stuffer_recv_byte(0, i+1);
}
byte_stuffer_recv_byte(0, 8);
byte_stuffer_recv_byte(0, 1);
byte_stuffer_recv_byte(0, 2);
byte_stuffer_recv_byte(0, 3);
byte_stuffer_recv_byte(0, 4);
byte_stuffer_recv_byte(0, 5);
byte_stuffer_recv_byte(0, 6);
byte_stuffer_recv_byte(0, 7);
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, receives_an_all_zeros_frame_that_is_maximum_size) {
uint8_t expected[MAX_FRAME_SIZE] = {};
expect(validator_recv_frame,
when(size, is_equal_to(MAX_FRAME_SIZE)),
when(data, is_equal_to_contents_of(expected, MAX_FRAME_SIZE))
);
int i;
byte_stuffer_recv_byte(0, 1);
for(i=0;i<MAX_FRAME_SIZE;i++) {
byte_stuffer_recv_byte(0, 1);
}
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, doesnt_recv_a_frame_thats_too_long_all_zeroes) {
uint8_t expected[1] = {0};
never_expect(validator_recv_frame);
int i;
byte_stuffer_recv_byte(0, 1);
for(i=0;i<MAX_FRAME_SIZE;i++) {
byte_stuffer_recv_byte(0, 1);
}
byte_stuffer_recv_byte(0, 1);
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, received_frame_is_aborted_when_its_too_long) {
uint8_t expected[1] = {1};
expect(validator_recv_frame,
when(size, is_equal_to(1)),
when(data, is_equal_to_contents_of(expected, 1))
);
int i;
byte_stuffer_recv_byte(0, 1);
for(i=0;i<MAX_FRAME_SIZE;i++) {
byte_stuffer_recv_byte(0, 1);
}
byte_stuffer_recv_byte(0, 2);
byte_stuffer_recv_byte(0, 1);
byte_stuffer_recv_byte(0, 0);
}
Ensure(ByteStuffer, does_nothing_when_sending_zero_size_frame) {
assert_that(sent_data_size, is_equal_to(0));
byte_stuffer_send_frame(0, NULL, 0);
}
Ensure(ByteStuffer, send_one_byte_frame) {
uint8_t data[] = {5};
byte_stuffer_send_frame(1, data, 1);
uint8_t expected[] = {2, 5, 0};
assert_that(sent_data_size, is_equal_to(sizeof(expected)));
assert_that(sent_data, is_equal_to_contents_of(expected, sizeof(expected)));
}
Ensure(ByteStuffer, sends_two_byte_frame) {
uint8_t data[] = {5, 0x77};
byte_stuffer_send_frame(0, data, 2);
uint8_t expected[] = {3, 5, 0x77, 0};
assert_that(sent_data_size, is_equal_to(sizeof(expected)));
assert_that(sent_data, is_equal_to_contents_of(expected, sizeof(expected)));
}
Ensure(ByteStuffer, sends_one_byte_frame_with_zero) {
uint8_t data[] = {0};
byte_stuffer_send_frame(0, data, 1);
uint8_t expected[] = {1, 1, 0};
assert_that(sent_data_size, is_equal_to(sizeof(expected)));
assert_that(sent_data, is_equal_to_contents_of(expected, sizeof(expected)));
}
Ensure(ByteStuffer, sends_two_byte_frame_starting_with_zero) {
uint8_t data[] = {0, 9};
byte_stuffer_send_frame(1, data, 2);
uint8_t expected[] = {1, 2, 9, 0};
assert_that(sent_data_size, is_equal_to(sizeof(expected)));
assert_that(sent_data, is_equal_to_contents_of(expected, sizeof(expected)));
}
Ensure(ByteStuffer, sends_two_byte_frame_starting_with_non_zero) {
uint8_t data[] = {9, 0};
byte_stuffer_send_frame(1, data, 2);
uint8_t expected[] = {2, 9, 1, 0};
assert_that(sent_data_size, is_equal_to(sizeof(expected)));
assert_that(sent_data, is_equal_to_contents_of(expected, sizeof(expected)));
}
Ensure(ByteStuffer, sends_three_byte_frame_zero_in_the_middle) {
uint8_t data[] = {9, 0, 0x68};
byte_stuffer_send_frame(0, data, 3);
uint8_t expected[] = {2, 9, 2, 0x68, 0};
assert_that(sent_data_size, is_equal_to(sizeof(expected)));
assert_that(sent_data, is_equal_to_contents_of(expected, sizeof(expected)));
}
Ensure(ByteStuffer, sends_three_byte_frame_data_in_the_middle) {
uint8_t data[] = {0, 0x55, 0};
byte_stuffer_send_frame(0, data, 3);
uint8_t expected[] = {1, 2, 0x55, 1, 0};
assert_that(sent_data_size, is_equal_to(sizeof(expected)));
assert_that(sent_data, is_equal_to_contents_of(expected, sizeof(expected)));
}
Ensure(ByteStuffer, sends_three_byte_frame_with_all_zeroes) {
uint8_t data[] = {0, 0, 0};
byte_stuffer_send_frame(0, data, 3);
uint8_t expected[] = {1, 1, 1, 1, 0};
assert_that(sent_data_size, is_equal_to(sizeof(expected)));
assert_that(sent_data, is_equal_to_contents_of(expected, sizeof(expected)));
}
Ensure(ByteStuffer, sends_frame_with_254_non_zeroes) {
uint8_t data[254];
int i;
for(i=0;i<254;i++) {
data[i] = i + 1;
}
byte_stuffer_send_frame(0, data, 254);
uint8_t expected[256];
expected[0] = 0xFF;
for(i=1;i<255;i++) {
expected[i] = i;
}
expected[255] = 0;
assert_that(sent_data_size, is_equal_to(sizeof(expected)));
assert_that(sent_data, is_equal_to_contents_of(expected, sizeof(expected)));
}
Ensure(ByteStuffer, sends_frame_with_255_non_zeroes) {
uint8_t data[255];
int i;
for(i=0;i<255;i++) {
data[i] = i + 1;
}
byte_stuffer_send_frame(0, data, 255);
uint8_t expected[258];
expected[0] = 0xFF;
for(i=1;i<255;i++) {
expected[i] = i;
}
expected[255] = 2;
expected[256] = 255;
expected[257] = 0;
assert_that(sent_data_size, is_equal_to(sizeof(expected)));
assert_that(sent_data, is_equal_to_contents_of(expected, sizeof(expected)));
}
Ensure(ByteStuffer, sends_frame_with_254_non_zeroes_followed_by_zero) {
uint8_t data[255];
int i;
for(i=0;i<254;i++) {
data[i] = i + 1;
}
data[255] = 0;
byte_stuffer_send_frame(0, data, 255);
uint8_t expected[258];
expected[0] = 0xFF;
for(i=1;i<255;i++) {
expected[i] = i;
}
expected[255] = 1;
expected[256] = 1;
expected[257] = 0;
assert_that(sent_data_size, is_equal_to(sizeof(expected)));
assert_that(sent_data, is_equal_to_contents_of(expected, sizeof(expected)));
}
Ensure(ByteStuffer, sends_and_receives_full_roundtrip_small_packet) {
uint8_t original_data[] = { 1, 2, 3};
byte_stuffer_send_frame(0, original_data, sizeof(original_data));
expect(validator_recv_frame,
when(size, is_equal_to(sizeof(original_data))),
when(data, is_equal_to_contents_of(original_data, sizeof(original_data)))
);
int i;
for(i=0;i<sent_data_size;i++) {
byte_stuffer_recv_byte(1, sent_data[i]);
}
}
Ensure(ByteStuffer, sends_and_receives_full_roundtrip_small_packet_with_zeros) {
uint8_t original_data[] = { 1, 0, 3, 0, 0, 9};
byte_stuffer_send_frame(1, original_data, sizeof(original_data));
expect(validator_recv_frame,
when(size, is_equal_to(sizeof(original_data))),
when(data, is_equal_to_contents_of(original_data, sizeof(original_data)))
);
int i;
for(i=0;i<sent_data_size;i++) {
byte_stuffer_recv_byte(0, sent_data[i]);
}
}
Ensure(ByteStuffer, sends_and_receives_full_roundtrip_254_bytes) {
uint8_t original_data[254];
int i;
for(i=0;i<254;i++) {
original_data[i] = i + 1;
}
byte_stuffer_send_frame(0, original_data, sizeof(original_data));
expect(validator_recv_frame,
when(size, is_equal_to(sizeof(original_data))),
when(data, is_equal_to_contents_of(original_data, sizeof(original_data)))
);
for(i=0;i<sent_data_size;i++) {
byte_stuffer_recv_byte(1, sent_data[i]);
}
}
Ensure(ByteStuffer, sends_and_receives_full_roundtrip_256_bytes) {
uint8_t original_data[256];
int i;
for(i=0;i<254;i++) {
original_data[i] = i + 1;
}
original_data[254] = 22;
original_data[255] = 23;
byte_stuffer_send_frame(0, original_data, sizeof(original_data));
expect(validator_recv_frame,
when(size, is_equal_to(sizeof(original_data))),
when(data, is_equal_to_contents_of(original_data, sizeof(original_data)))
);
for(i=0;i<sent_data_size;i++) {
byte_stuffer_recv_byte(1, sent_data[i]);
}
}
Ensure(ByteStuffer, sends_and_receives_full_roundtrip_254_bytes_and_then_zero) {
uint8_t original_data[255];
int i;
for(i=0;i<254;i++) {
original_data[i] = i + 1;
}
original_data[254] = 0;
byte_stuffer_send_frame(0, original_data, sizeof(original_data));
expect(validator_recv_frame,
when(size, is_equal_to(sizeof(original_data))),
when(data, is_equal_to_contents_of(original_data, sizeof(original_data)))
);
for(i=0;i<sent_data_size;i++) {
byte_stuffer_recv_byte(1, sent_data[i]);
}
}

231
quantum/serial_link/tests/frame_router_tests.c Normal file
View file

@ -0,0 +1,231 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include <cgreen/cgreen.h>
#include <cgreen/mocks.h>
#include "serial_link/protocol/byte_stuffer.c"
#include "serial_link/protocol/frame_validator.c"
#include "serial_link/protocol/frame_router.c"
#include "serial_link/protocol/transport.h"
static uint8_t received_data[256];
static uint16_t received_data_size;
typedef struct {
uint8_t sent_data[256];
uint16_t sent_data_size;
} receive_buffer_t;
typedef struct {
receive_buffer_t send_buffers[2];
} router_buffer_t;
router_buffer_t router_buffers[8];
router_buffer_t* current_router_buffer;
Describe(FrameRouter);
BeforeEach(FrameRouter) {
init_byte_stuffer();
memset(router_buffers, 0, sizeof(router_buffers));
current_router_buffer = 0;
}
AfterEach(FrameRouter) {}
typedef struct {
uint32_t data;
uint8_t extra[16];
} frame_buffer_t;
void send_data(uint8_t link, const uint8_t* data, uint16_t size) {
receive_buffer_t* buffer = &current_router_buffer->send_buffers[link];
memcpy(buffer->sent_data + buffer->sent_data_size, data, size);
buffer->sent_data_size += size;
}
static void receive_data(uint8_t link, uint8_t* data, uint16_t size) {
int i;
for(i=0;i<size;i++) {
byte_stuffer_recv_byte(link, data[i]);
}
}
static void activate_router(uint8_t num) {
current_router_buffer = router_buffers + num;
router_set_master(num==0);
}
static void simulate_transport(uint8_t from, uint8_t to) {
activate_router(to);
if (from > to) {
receive_data(DOWN_LINK,
router_buffers[from].send_buffers[UP_LINK].sent_data,
router_buffers[from].send_buffers[UP_LINK].sent_data_size);
}
else if(to > from) {
receive_data(UP_LINK,
router_buffers[from].send_buffers[DOWN_LINK].sent_data,
router_buffers[from].send_buffers[DOWN_LINK].sent_data_size);
}
}
void transport_recv_frame(uint8_t from, uint8_t* data, uint16_t size) {
mock(from, data, size);
}
Ensure(FrameRouter, master_broadcast_is_received_by_everyone) {
frame_buffer_t data;
data.data = 0xAB7055BB;
activate_router(0);
router_send_frame(0xFF, (uint8_t*)&data, 4);
assert_that(router_buffers[0].send_buffers[DOWN_LINK].sent_data_size, is_greater_than(0));
assert_that(router_buffers[0].send_buffers[UP_LINK].sent_data_size, is_equal_to(0));
expect(transport_recv_frame,
when(from, is_equal_to(0)),
when(size, is_equal_to(4)),
when(data, is_equal_to_contents_of(&data.data, 4))
);
simulate_transport(0, 1);
assert_that(router_buffers[1].send_buffers[DOWN_LINK].sent_data_size, is_greater_than(0));
assert_that(router_buffers[1].send_buffers[UP_LINK].sent_data_size, is_equal_to(0));
expect(transport_recv_frame,
when(from, is_equal_to(0)),
when(size, is_equal_to(4)),
when(data, is_equal_to_contents_of(&data.data, 4))
);
simulate_transport(1, 2);
assert_that(router_buffers[2].send_buffers[DOWN_LINK].sent_data_size, is_greater_than(0));
assert_that(router_buffers[2].send_buffers[UP_LINK].sent_data_size, is_equal_to(0));
}
Ensure(FrameRouter, master_send_is_received_by_targets) {
frame_buffer_t data;
data.data = 0xAB7055BB;
activate_router(0);
router_send_frame((1 << 1) | (1 << 2), (uint8_t*)&data, 4);
assert_that(router_buffers[0].send_buffers[DOWN_LINK].sent_data_size, is_greater_than(0));
assert_that(router_buffers[0].send_buffers[UP_LINK].sent_data_size, is_equal_to(0));
simulate_transport(0, 1);
assert_that(router_buffers[1].send_buffers[DOWN_LINK].sent_data_size, is_greater_than(0));
assert_that(router_buffers[1].send_buffers[UP_LINK].sent_data_size, is_equal_to(0));
expect(transport_recv_frame,
when(from, is_equal_to(0)),
when(size, is_equal_to(4)),
when(data, is_equal_to_contents_of(&data.data, 4))
);
simulate_transport(1, 2);
assert_that(router_buffers[2].send_buffers[DOWN_LINK].sent_data_size, is_greater_than(0));
assert_that(router_buffers[2].send_buffers[UP_LINK].sent_data_size, is_equal_to(0));
expect(transport_recv_frame,
when(from, is_equal_to(0)),
when(size, is_equal_to(4)),
when(data, is_equal_to_contents_of(&data.data, 4))
);
simulate_transport(2, 3);
assert_that(router_buffers[3].send_buffers[DOWN_LINK].sent_data_size, is_greater_than(0));
assert_that(router_buffers[3].send_buffers[UP_LINK].sent_data_size, is_equal_to(0));
}
Ensure(FrameRouter, first_link_sends_to_master) {
frame_buffer_t data;
data.data = 0xAB7055BB;
activate_router(1);
router_send_frame(0, (uint8_t*)&data, 4);
assert_that(router_buffers[1].send_buffers[UP_LINK].sent_data_size, is_greater_than(0));
assert_that(router_buffers[1].send_buffers[DOWN_LINK].sent_data_size, is_equal_to(0));
expect(transport_recv_frame,
when(from, is_equal_to(1)),
when(size, is_equal_to(4)),
when(data, is_equal_to_contents_of(&data.data, 4))
);
simulate_transport(1, 0);
assert_that(router_buffers[0].send_buffers[DOWN_LINK].sent_data_size, is_equal_to(0));
assert_that(router_buffers[0].send_buffers[UP_LINK].sent_data_size, is_equal_to(0));
}
Ensure(FrameRouter, second_link_sends_to_master) {
frame_buffer_t data;
data.data = 0xAB7055BB;
activate_router(2);
router_send_frame(0, (uint8_t*)&data, 4);
assert_that(router_buffers[2].send_buffers[UP_LINK].sent_data_size, is_greater_than(0));
assert_that(router_buffers[2].send_buffers[DOWN_LINK].sent_data_size, is_equal_to(0));
simulate_transport(2, 1);
assert_that(router_buffers[1].send_buffers[UP_LINK].sent_data_size, is_greater_than(0));
assert_that(router_buffers[1].send_buffers[DOWN_LINK].sent_data_size, is_equal_to(0));
expect(transport_recv_frame,
when(from, is_equal_to(2)),
when(size, is_equal_to(4)),
when(data, is_equal_to_contents_of(&data.data, 4))
);
simulate_transport(1, 0);
assert_that(router_buffers[0].send_buffers[DOWN_LINK].sent_data_size, is_equal_to(0));
assert_that(router_buffers[0].send_buffers[UP_LINK].sent_data_size, is_equal_to(0));
}
Ensure(FrameRouter, master_sends_to_master_does_nothing) {
frame_buffer_t data;
data.data = 0xAB7055BB;
activate_router(0);
router_send_frame(0, (uint8_t*)&data, 4);
assert_that(router_buffers[0].send_buffers[UP_LINK].sent_data_size, is_equal_to(0));
assert_that(router_buffers[0].send_buffers[DOWN_LINK].sent_data_size, is_equal_to(0));
}
Ensure(FrameRouter, link_sends_to_other_link_does_nothing) {
frame_buffer_t data;
data.data = 0xAB7055BB;
activate_router(1);
router_send_frame(2, (uint8_t*)&data, 4);
assert_that(router_buffers[1].send_buffers[UP_LINK].sent_data_size, is_equal_to(0));
assert_that(router_buffers[1].send_buffers[DOWN_LINK].sent_data_size, is_equal_to(0));
}
Ensure(FrameRouter, master_receives_on_uplink_does_nothing) {
frame_buffer_t data;
data.data = 0xAB7055BB;
activate_router(1);
router_send_frame(0, (uint8_t*)&data, 4);
assert_that(router_buffers[1].send_buffers[UP_LINK].sent_data_size, is_greater_than(0));
assert_that(router_buffers[1].send_buffers[DOWN_LINK].sent_data_size, is_equal_to(0));
never_expect(transport_recv_frame);
activate_router(0);
receive_data(UP_LINK,
router_buffers[1].send_buffers[UP_LINK].sent_data,
router_buffers[1].send_buffers[UP_LINK].sent_data_size);
assert_that(router_buffers[0].send_buffers[UP_LINK].sent_data_size, is_equal_to(0));
assert_that(router_buffers[0].send_buffers[DOWN_LINK].sent_data_size, is_equal_to(0));
}

101
quantum/serial_link/tests/frame_validator_tests.c Normal file
View file

@ -0,0 +1,101 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include <cgreen/cgreen.h>
#include <cgreen/mocks.h>
#include "serial_link/protocol/frame_validator.c"
void route_incoming_frame(uint8_t link, uint8_t* data, uint16_t size) {
mock(data, size);
}
void byte_stuffer_send_frame(uint8_t link, uint8_t* data, uint16_t size) {
mock(data, size);
}
Describe(FrameValidator);
BeforeEach(FrameValidator) {}
AfterEach(FrameValidator) {}
Ensure(FrameValidator, doesnt_validate_frames_under_5_bytes) {
never_expect(route_incoming_frame);
uint8_t data[] = {1, 2};
validator_recv_frame(0, 0, 1);
validator_recv_frame(0, data, 2);
validator_recv_frame(0, data, 3);
validator_recv_frame(0, data, 4);
}
Ensure(FrameValidator, validates_one_byte_frame_with_correct_crc) {
uint8_t data[] = {0x44, 0x04, 0x6A, 0xB3, 0xA3};
expect(route_incoming_frame,
when(size, is_equal_to(1)),
when(data, is_equal_to_contents_of(data, 1))
);
validator_recv_frame(0, data, 5);
}
Ensure(FrameValidator, does_not_validate_one_byte_frame_with_incorrect_crc) {
uint8_t data[] = {0x44, 0, 0, 0, 0};
never_expect(route_incoming_frame);
validator_recv_frame(1, data, 5);
}
Ensure(FrameValidator, validates_four_byte_frame_with_correct_crc) {
uint8_t data[] = {0x44, 0x10, 0xFF, 0x00, 0x74, 0x4E, 0x30, 0xBA};
expect(route_incoming_frame,
when(size, is_equal_to(4)),
when(data, is_equal_to_contents_of(data, 4))
);
validator_recv_frame(1, data, 8);
}
Ensure(FrameValidator, validates_five_byte_frame_with_correct_crc) {
uint8_t data[] = {1, 2, 3, 4, 5, 0xF4, 0x99, 0x0B, 0x47};
expect(route_incoming_frame,
when(size, is_equal_to(5)),
when(data, is_equal_to_contents_of(data, 5))
);
validator_recv_frame(0, data, 9);
}
Ensure(FrameValidator, sends_one_byte_with_correct_crc) {
uint8_t original[] = {0x44, 0, 0, 0, 0};
uint8_t expected[] = {0x44, 0x04, 0x6A, 0xB3, 0xA3};
expect(byte_stuffer_send_frame,
when(size, is_equal_to(sizeof(expected))),
when(data, is_equal_to_contents_of(expected, sizeof(expected)))
);
validator_send_frame(0, original, 1);
}
Ensure(FrameValidator, sends_five_bytes_with_correct_crc) {
uint8_t original[] = {1, 2, 3, 4, 5, 0, 0, 0, 0};
uint8_t expected[] = {1, 2, 3, 4, 5, 0xF4, 0x99, 0x0B, 0x47};
expect(byte_stuffer_send_frame,
when(size, is_equal_to(sizeof(expected))),
when(data, is_equal_to_contents_of(expected, sizeof(expected)))
);
validator_send_frame(0, original, 5);
}

168
quantum/serial_link/tests/transport_tests.c Normal file
View file

@ -0,0 +1,168 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include <cgreen/cgreen.h>
#include <cgreen/mocks.h>
#include "serial_link/protocol/transport.c"
#include "serial_link/protocol/triple_buffered_object.c"
void signal_data_written(void) {
mock();
}
static uint8_t sent_data[2048];
static uint16_t sent_data_size;
void router_send_frame(uint8_t destination, uint8_t* data, uint16_t size) {
mock(destination);
memcpy(sent_data + sent_data_size, data, size);
sent_data_size += size;
}
typedef struct {
uint32_t test;
} test_object1_t;
typedef struct {
uint32_t test1;
uint32_t test2;
} test_object2_t;
MASTER_TO_ALL_SLAVES_OBJECT(master_to_slave, test_object1_t);
MASTER_TO_SINGLE_SLAVE_OBJECT(master_to_single_slave, test_object1_t);
SLAVE_TO_MASTER_OBJECT(slave_to_master, test_object1_t);
static remote_object_t* test_remote_objects[] = {
REMOTE_OBJECT(master_to_slave),
REMOTE_OBJECT(master_to_single_slave),
REMOTE_OBJECT(slave_to_master),
};
Describe(Transport);
BeforeEach(Transport) {
add_remote_objects(test_remote_objects, sizeof(test_remote_objects) / sizeof(remote_object_t*));
sent_data_size = 0;
}
AfterEach(Transport) {}
Ensure(Transport, write_to_local_signals_an_event) {
begin_write_master_to_slave();
expect(signal_data_written);
end_write_master_to_slave();
begin_write_slave_to_master();
expect(signal_data_written);
end_write_slave_to_master();
begin_write_master_to_single_slave(1);
expect(signal_data_written);
end_write_master_to_single_slave(1);
}
Ensure(Transport, writes_from_master_to_all_slaves) {
update_transport();
test_object1_t* obj = begin_write_master_to_slave();
obj->test = 5;
expect(signal_data_written);
end_write_master_to_slave();
expect(router_send_frame,
when(destination, is_equal_to(0xFF)));
update_transport();
transport_recv_frame(0, sent_data, sent_data_size);
test_object1_t* obj2 = read_master_to_slave();
assert_that(obj2, is_not_equal_to(NULL));
assert_that(obj2->test, is_equal_to(5));
}
Ensure(Transport, writes_from_slave_to_master) {
update_transport();
test_object1_t* obj = begin_write_slave_to_master();
obj->test = 7;
expect(signal_data_written);
end_write_slave_to_master();
expect(router_send_frame,
when(destination, is_equal_to(0)));
update_transport();
transport_recv_frame(3, sent_data, sent_data_size);
test_object1_t* obj2 = read_slave_to_master(2);
assert_that(read_slave_to_master(0), is_equal_to(NULL));
assert_that(obj2, is_not_equal_to(NULL));
assert_that(obj2->test, is_equal_to(7));
}
Ensure(Transport, writes_from_master_to_single_slave) {
update_transport();
test_object1_t* obj = begin_write_master_to_single_slave(3);
obj->test = 7;
expect(signal_data_written);
end_write_master_to_single_slave(3);
expect(router_send_frame,
when(destination, is_equal_to(4)));
update_transport();
transport_recv_frame(0, sent_data, sent_data_size);
test_object1_t* obj2 = read_master_to_single_slave();
assert_that(obj2, is_not_equal_to(NULL));
assert_that(obj2->test, is_equal_to(7));
}
Ensure(Transport, ignores_object_with_invalid_id) {
update_transport();
test_object1_t* obj = begin_write_master_to_single_slave(3);
obj->test = 7;
expect(signal_data_written);
end_write_master_to_single_slave(3);
expect(router_send_frame,
when(destination, is_equal_to(4)));
update_transport();
sent_data[sent_data_size - 1] = 44;
transport_recv_frame(0, sent_data, sent_data_size);
test_object1_t* obj2 = read_master_to_single_slave();
assert_that(obj2, is_equal_to(NULL));
}
Ensure(Transport, ignores_object_with_size_too_small) {
update_transport();
test_object1_t* obj = begin_write_master_to_slave();
obj->test = 7;
expect(signal_data_written);
end_write_master_to_slave();
expect(router_send_frame);
update_transport();
sent_data[sent_data_size - 2] = 0;
transport_recv_frame(0, sent_data, sent_data_size - 1);
test_object1_t* obj2 = read_master_to_slave();
assert_that(obj2, is_equal_to(NULL));
}
Ensure(Transport, ignores_object_with_size_too_big) {
update_transport();
test_object1_t* obj = begin_write_master_to_slave();
obj->test = 7;
expect(signal_data_written);
end_write_master_to_slave();
expect(router_send_frame);
update_transport();
sent_data[sent_data_size + 21] = 0;
transport_recv_frame(0, sent_data, sent_data_size + 22);
test_object1_t* obj2 = read_master_to_slave();
assert_that(obj2, is_equal_to(NULL));
}

82
quantum/serial_link/tests/triple_buffered_object_tests.c Normal file
View file

@ -0,0 +1,82 @@
/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include <cgreen/cgreen.h>
#include "serial_link/protocol/triple_buffered_object.c"
typedef struct {
uint8_t state;
uint32_t buffer[3];
}test_object_t;
test_object_t test_object;
Describe(TripleBufferedObject);
BeforeEach(TripleBufferedObject) {
triple_buffer_init((triple_buffer_object_t*)&test_object);
}
AfterEach(TripleBufferedObject) {}
Ensure(TripleBufferedObject, writes_and_reads_object) {
*triple_buffer_begin_write(&test_object) = 0x3456ABCC;
triple_buffer_end_write(&test_object);
assert_that(*triple_buffer_read(&test_object), is_equal_to(0x3456ABCC));
}
Ensure(TripleBufferedObject, does_not_read_empty) {
assert_that(triple_buffer_read(&test_object), is_equal_to(NULL));
}
Ensure(TripleBufferedObject, writes_twice_and_reads_object) {
*triple_buffer_begin_write(&test_object) = 0x3456ABCC;
triple_buffer_end_write(&test_object);
*triple_buffer_begin_write(&test_object) = 0x44778899;
triple_buffer_end_write(&test_object);
assert_that(*triple_buffer_read(&test_object), is_equal_to(0x44778899));
}
Ensure(TripleBufferedObject, performs_another_write_in_the_middle_of_read) {
*triple_buffer_begin_write(&test_object) = 1;
triple_buffer_end_write(&test_object);
uint32_t* read = triple_buffer_read(&test_object);
*triple_buffer_begin_write(&test_object) = 2;
triple_buffer_end_write(&test_object);
assert_that(*read, is_equal_to(1));
assert_that(*triple_buffer_read(&test_object), is_equal_to(2));
assert_that(triple_buffer_read(&test_object), is_equal_to(NULL));
}
Ensure(TripleBufferedObject, performs_two_writes_in_the_middle_of_read) {
*triple_buffer_begin_write(&test_object) = 1;
triple_buffer_end_write(&test_object);
uint32_t* read = triple_buffer_read(&test_object);
*triple_buffer_begin_write(&test_object) = 2;
triple_buffer_end_write(&test_object);
*triple_buffer_begin_write(&test_object) = 3;
triple_buffer_end_write(&test_object);
assert_that(*read, is_equal_to(1));
assert_that(*triple_buffer_read(&test_object), is_equal_to(3));
assert_that(triple_buffer_read(&test_object), is_equal_to(NULL));
}