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qmk_firmware/drivers/arm/i2c_master.c

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/* Copyright 2018 Jack Humbert
* Copyright 2018 Yiancar
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* This library is only valid for STM32 processors.
* This library follows the convention of the AVR i2c_master library.
* As a result addresses are expected to be already shifted (addr << 1).
* I2CD1 is the default driver which corresponds to pins B6 and B7. This
* can be changed.
* Please ensure that HAL_USE_I2C is TRUE in the halconf.h file and that
* STM32_I2C_USE_I2C1 is TRUE in the mcuconf.h file. Pins B6 and B7 are used
* but using any other I2C pins should be trivial.
*/
#include "i2c_master.h"
#include "quantum.h"
#include <string.h>
#include <hal.h>
static uint8_t i2c_address;
adding Hadron v3 keyboard, QWIIC devices support, haptic feedback support (#4462) * add initial support for hadron ver3 * add initial support for hadron ver3 * pull qwiic support for micro_led to be modified for use in hadron's 64x24 ssd1306 oled display * initial work on OLED using qwiic driver * early work to get 128x32 oled working by redefining qwiic micro oled parameters. Currently working, but would affect qwiic's micro oled functionality * moved oled defines to config.h and added ifndef to micro_oled driver * WORKING :D - note, still work in progress to get the start location correct on the 128x32 display. * added equation to automatically calculate display offset based on screen width * adding time-out timer to oled display * changed read lock staus via read_led_state * lock indications fixes * Added scroll lock indication to oled * add support for DRV2605 haptic driver * Improve readabiity of DRV2605 driver. -added typedef for waveform library -added unions for registers * Update keyboards/hadron/ver2/keymaps/default/config.h Co-Authored-By: ishtob <ishtob@gmail.com> * Update keyboards/hadron/ver2/keymaps/default/config.h Co-Authored-By: ishtob <ishtob@gmail.com> * Update keyboards/hadron/ver2/keymaps/default/config.h Co-Authored-By: ishtob <ishtob@gmail.com> * Update keyboards/hadron/ver2/keymaps/default/config.h Co-Authored-By: ishtob <ishtob@gmail.com> * Fixes for PR * PR fixes * fix old persistent layer function to use new set_single_persistent_default_layer * fix issues with changing makefile defines that broken per-key haptic pulse * Comment fixes * Add definable parameter and auto-calibration based on motor choice
2018-12-04 16:04:57 +00:00
// This configures the I2C clock to 400khz assuming a 72Mhz clock
// For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
static const I2CConfig i2cconfig = {
STM32_TIMINGR_PRESC(15U) |
STM32_TIMINGR_SCLDEL(4U) | STM32_TIMINGR_SDADEL(2U) |
STM32_TIMINGR_SCLH(15U) | STM32_TIMINGR_SCLL(21U),
0,
0
};
__attribute__ ((weak))
void i2c_init(void)
{
adding Hadron v3 keyboard, QWIIC devices support, haptic feedback support (#4462) * add initial support for hadron ver3 * add initial support for hadron ver3 * pull qwiic support for micro_led to be modified for use in hadron's 64x24 ssd1306 oled display * initial work on OLED using qwiic driver * early work to get 128x32 oled working by redefining qwiic micro oled parameters. Currently working, but would affect qwiic's micro oled functionality * moved oled defines to config.h and added ifndef to micro_oled driver * WORKING :D - note, still work in progress to get the start location correct on the 128x32 display. * added equation to automatically calculate display offset based on screen width * adding time-out timer to oled display * changed read lock staus via read_led_state * lock indications fixes * Added scroll lock indication to oled * add support for DRV2605 haptic driver * Improve readabiity of DRV2605 driver. -added typedef for waveform library -added unions for registers * Update keyboards/hadron/ver2/keymaps/default/config.h Co-Authored-By: ishtob <ishtob@gmail.com> * Update keyboards/hadron/ver2/keymaps/default/config.h Co-Authored-By: ishtob <ishtob@gmail.com> * Update keyboards/hadron/ver2/keymaps/default/config.h Co-Authored-By: ishtob <ishtob@gmail.com> * Update keyboards/hadron/ver2/keymaps/default/config.h Co-Authored-By: ishtob <ishtob@gmail.com> * Fixes for PR * PR fixes * fix old persistent layer function to use new set_single_persistent_default_layer * fix issues with changing makefile defines that broken per-key haptic pulse * Comment fixes * Add definable parameter and auto-calibration based on motor choice
2018-12-04 16:04:57 +00:00
// Try releasing special pins for a short time
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palSetPadMode(I2C1_BANK, I2C1_SCL, PAL_MODE_INPUT);
palSetPadMode(I2C1_BANK, I2C1_SDA, PAL_MODE_INPUT);
adding Hadron v3 keyboard, QWIIC devices support, haptic feedback support (#4462) * add initial support for hadron ver3 * add initial support for hadron ver3 * pull qwiic support for micro_led to be modified for use in hadron's 64x24 ssd1306 oled display * initial work on OLED using qwiic driver * early work to get 128x32 oled working by redefining qwiic micro oled parameters. Currently working, but would affect qwiic's micro oled functionality * moved oled defines to config.h and added ifndef to micro_oled driver * WORKING :D - note, still work in progress to get the start location correct on the 128x32 display. * added equation to automatically calculate display offset based on screen width * adding time-out timer to oled display * changed read lock staus via read_led_state * lock indications fixes * Added scroll lock indication to oled * add support for DRV2605 haptic driver * Improve readabiity of DRV2605 driver. -added typedef for waveform library -added unions for registers * Update keyboards/hadron/ver2/keymaps/default/config.h Co-Authored-By: ishtob <ishtob@gmail.com> * Update keyboards/hadron/ver2/keymaps/default/config.h Co-Authored-By: ishtob <ishtob@gmail.com> * Update keyboards/hadron/ver2/keymaps/default/config.h Co-Authored-By: ishtob <ishtob@gmail.com> * Update keyboards/hadron/ver2/keymaps/default/config.h Co-Authored-By: ishtob <ishtob@gmail.com> * Fixes for PR * PR fixes * fix old persistent layer function to use new set_single_persistent_default_layer * fix issues with changing makefile defines that broken per-key haptic pulse * Comment fixes * Add definable parameter and auto-calibration based on motor choice
2018-12-04 16:04:57 +00:00
chThdSleepMilliseconds(10);
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palSetPadMode(I2C1_BANK, I2C1_SCL, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN);
palSetPadMode(I2C1_BANK, I2C1_SDA, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN);
//i2cInit(); //This is invoked by halInit() so no need to redo it.
}
// This is usually not needed
uint8_t i2c_start(uint8_t address)
{
i2c_address = address;
i2cStart(&I2C_DRIVER, &i2cconfig);
return 0;
}
uint8_t i2c_transmit(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout)
{
i2c_address = address;
i2cStart(&I2C_DRIVER, &i2cconfig);
return i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), data, length, 0, 0, MS2ST(timeout));
}
uint8_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout)
{
i2c_address = address;
i2cStart(&I2C_DRIVER, &i2cconfig);
return i2cMasterReceiveTimeout(&I2C_DRIVER, (i2c_address >> 1), data, length, MS2ST(timeout));
}
uint8_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)
{
i2c_address = devaddr;
i2cStart(&I2C_DRIVER, &i2cconfig);
uint8_t complete_packet[length + 1];
for(uint8_t i = 0; i < length; i++)
{
complete_packet[i+1] = data[i];
}
complete_packet[0] = regaddr;
return i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), complete_packet, length + 1, 0, 0, MS2ST(timeout));
}
uint8_t i2c_readReg(uint8_t devaddr, uint8_t* regaddr, uint8_t* data, uint16_t length, uint16_t timeout)
{
i2c_address = devaddr;
i2cStart(&I2C_DRIVER, &i2cconfig);
return i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), regaddr, 1, data, length, MS2ST(timeout));
}
// This is usually not needed. It releases the driver to allow pins to become GPIO again.
uint8_t i2c_stop(uint16_t timeout)
{
i2cStop(&I2C_DRIVER);
return 0;
}