Nulo/qmk_firmware
1
0
Fork 0
Code Releases Activity

3w6 - Refactor use of AVR only I2C functions (#14339)

Browse source 
* Refactor use of legacy i2c functions

* Align rev2

* Review fixes
This commit is contained in:
Joel Challis 2021-09-07 16:35:13 +01:00 committed by GitHub
parent e7a5c006d9
commit 04c0704b28
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 58 additions and 99 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

82
keyboards/3w6/rev1/matrix.c
View file

@ -35,8 +35,6 @@ extern i2c_status_t tca9555_status;
// | 0 | 1 | 0 | 0 | A2 | A1 | A0 |
// | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
#define I2C_ADDR 0b0100000
#define I2C_ADDR_WRITE ((I2C_ADDR << 1) | I2C_WRITE)
#define I2C_ADDR_READ ((I2C_ADDR << 1) | I2C_READ)
// Register addresses
#define IODIRA 0x06 // i/o direction register
@ -64,19 +62,14 @@ uint8_t init_tca9555(void) {
// - unused : input : 1
// - input : input : 1
// - driving : output : 0
tca9555_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_write(IODIRA, I2C_TIMEOUT);
if (tca9555_status) goto out;
// This means: write on pin 5 of port 0, read on rest
tca9555_status = i2c_write(0b11011111, I2C_TIMEOUT);
if (tca9555_status) goto out;
// This means: we will write on pins 0 to 2 on port 1. read rest
tca9555_status = i2c_write(0b11111000, I2C_TIMEOUT);
if (tca9555_status) goto out;
uint8_t conf[2] = {
// This means: write on pin 5 of port 0, read on rest
0b11011111,
// This means: we will write on pins 0 to 2 on port 1. read rest
0b11111000,
};
tca9555_status = i2c_writeReg(I2C_ADDR, IODIRA, conf, 2, I2C_TIMEOUT);
out:
i2c_stop();
return tca9555_status;
}
@ -192,36 +185,29 @@ static matrix_row_t read_cols(uint8_t row) {
if (tca9555_status) { // if there was an error
return 0;
} else {
uint8_t data = 0;
uint8_t port0 = 0;
uint8_t port1 = 0;
tca9555_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_write(IREGP0, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_start(I2C_ADDR_READ, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_read_ack(I2C_TIMEOUT);
if (tca9555_status < 0) goto out;
port0 = (uint8_t)tca9555_status;
tca9555_status = i2c_read_nack(I2C_TIMEOUT);
if (tca9555_status < 0) goto out;
port1 = (uint8_t)tca9555_status;
uint8_t data = 0;
uint8_t ports[2] = {0};
tca9555_status = i2c_readReg(I2C_ADDR, IREGP0, ports, 2, I2C_TIMEOUT);
if (tca9555_status) { // if there was an error
// do nothing
return 0;
} else {
uint8_t port0 = ports[0];
uint8_t port1 = ports[1];
// The initial state was all ones and any depressed key at a given column for the currently selected row will have its bit flipped to zero.
// The return value is a row as represented in the generic matrix code were the rightmost bits represent the lower columns and zeroes represent non-depressed keys while ones represent depressed keys.
// Since the pins are not ordered sequentially, we have to build the correct dataset from the two ports. Refer to the schematic to see where every pin is connected.
data |= ( port0 & 0x01 );
data |= ( port0 & 0x02 );
data |= ( port1 & 0x10 ) >> 2;
data |= ( port1 & 0x08 );
data |= ( port0 & 0x40 ) >> 2;
data = ~(data);
// The initial state was all ones and any depressed key at a given column for the currently selected row will have its bit flipped to zero.
// The return value is a row as represented in the generic matrix code were the rightmost bits represent the lower columns and zeroes represent non-depressed keys while ones represent depressed keys.
// Since the pins are not ordered sequentially, we have to build the correct dataset from the two ports. Refer to the schematic to see where every pin is connected.
data |= ( port0 & 0x01 );
data |= ( port0 & 0x02 );
data |= ( port1 & 0x10 ) >> 2;
data |= ( port1 & 0x08 );
data |= ( port0 & 0x40 ) >> 2;
data = ~(data);
tca9555_status = I2C_STATUS_SUCCESS;
out:
i2c_stop();
return data;
tca9555_status = I2C_STATUS_SUCCESS;
return data;
}
}
}
}
@ -263,18 +249,10 @@ static void select_row(uint8_t row) {
default: break;
}
tca9555_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_write(OREGP0, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_write(port0, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_write(port1, I2C_TIMEOUT);
if (tca9555_status) goto out;
uint8_t ports[2] = {port0, port1};
tca9555_status = i2c_writeReg(I2C_ADDR, OREGP0, ports, 2, I2C_TIMEOUT);
// Select the desired row by writing a byte for the entire GPIOB bus where only the bit representing the row we want to select is a zero (write instruction) and every other bit is a one.
// Note that the row - MATRIX_ROWS_PER_SIDE reflects the fact that being on the right hand, the columns are numbered from MATRIX_ROWS_PER_SIDE to MATRIX_ROWS, but the pins we want to write to are indexed from zero up on the GPIOB bus.
out:
i2c_stop();
}
}
}

75
keyboards/3w6/rev2/matrix.c
View file

@ -35,8 +35,6 @@ extern i2c_status_t tca9555_status;
// | 0 | 1 | 0 | 0 | A2 | A1 | A0 |
// | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
#define I2C_ADDR 0b0100000
#define I2C_ADDR_WRITE ((I2C_ADDR << 1) | I2C_WRITE)
#define I2C_ADDR_READ ((I2C_ADDR << 1) | I2C_READ)
// Register addresses
#define IODIRA 0x06 // i/o direction register
@ -64,19 +62,14 @@ uint8_t init_tca9555(void) {
// - unused : input : 1
// - input : input : 1
// - driving : output : 0
tca9555_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_write(IODIRA, I2C_TIMEOUT);
if (tca9555_status) goto out;
// This means: read all pins of port 0
tca9555_status = i2c_write(0b11111111, I2C_TIMEOUT);
if (tca9555_status) goto out;
// This means: we will write on pins 0 to 3 on port 1. read rest
tca9555_status = i2c_write(0b11110000, I2C_TIMEOUT);
if (tca9555_status) goto out;
uint8_t conf[2] = {
// This means: read all pins of port 0
0b11111111,
// This means: we will write on pins 0 to 3 on port 1. read rest
0b11110000,
};
tca9555_status = i2c_writeReg(I2C_ADDR, IODIRA, conf, 2, I2C_TIMEOUT);
out:
i2c_stop();
return tca9555_status;
}
@ -194,32 +187,27 @@ static matrix_row_t read_cols(uint8_t row) {
} else {
uint8_t data = 0;
uint8_t port0 = 0;
tca9555_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_write(IREGP0, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_start(I2C_ADDR_READ, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_read_nack(I2C_TIMEOUT);
if (tca9555_status < 0) goto out;
port0 = ~(uint8_t)tca9555_status;
tca9555_status = i2c_readReg(I2C_ADDR, IREGP0, port0, 1, I2C_TIMEOUT);
if (tca9555_status) { // if there was an error
// do nothing
return 0;
} else {
uint8_t port0 = ports[0];
uint8_t port1 = ports[1];
// We read all the pins on GPIOA.
// The initial state was all ones and any depressed key at a given column for the currently selected row will have its bit flipped to zero.
// The return value is a row as represented in the generic matrix code were the rightmost bits represent the lower columns and zeroes represent non-depressed keys while ones represent depressed keys.
// the pins connected to eact columns are sequential, but in reverse order, and counting from zero down (col 5 -> GPIO04, col6 -> GPIO03 and so on).
data |= ( port0 & 0x01 ) << 4;
data |= ( port0 & 0x02 ) << 2;
data |= ( port0 & 0x04 );
data |= ( port0 & 0x08 ) >> 2;
data |= ( port0 & 0x10 ) >> 4;
// We read all the pins on GPIOA.
// The initial state was all ones and any depressed key at a given column for the currently selected row will have its bit flipped to zero.
// The return value is a row as represented in the generic matrix code were the rightmost bits represent the lower columns and zeroes represent non-depressed keys while ones represent depressed keys.
// the pins connected to eact columns are sequential, but in reverse order, and counting from zero down (col 5 -> GPIO04, col6 -> GPIO03 and so on).
data |= ( port0 & 0x01 ) << 4;
data |= ( port0 & 0x02 ) << 2;
data |= ( port0 & 0x04 );
data |= ( port0 & 0x08 ) >> 2;
data |= ( port0 & 0x10 ) >> 4;
tca9555_status = I2C_STATUS_SUCCESS;
out:
i2c_stop();
return data;
tca9555_status = I2C_STATUS_SUCCESS;
return data;
}
}
}
}
@ -256,20 +244,13 @@ static void select_row(uint8_t row) {
case 4: port1 &= ~(1 << 0); break;
case 5: port1 &= ~(1 << 1); break;
case 6: port1 &= ~(1 << 2); break;
case 7: port1 &= ~(1 << 3); break;
case 7: port0 &= ~(1 << 5); break;
default: break;
}
tca9555_status = i2c_writeReg(I2C_ADDR, OREGP1, port1, 2, I2C_TIMEOUT);
// Select the desired row by writing a byte for the entire GPIOB bus where only the bit representing the row we want to select is a zero (write instruction) and every other bit is a one.
// Note that the row - MATRIX_ROWS_PER_SIDE reflects the fact that being on the right hand, the columns are numbered from MATRIX_ROWS_PER_SIDE to MATRIX_ROWS, but the pins we want to write to are indexed from zero up on the GPIOB bus.
tca9555_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_write(OREGP1, I2C_TIMEOUT);
if (tca9555_status) goto out;
tca9555_status = i2c_write(port1, I2C_TIMEOUT);
if (tca9555_status) goto out;
out:
i2c_stop();
}
}
}