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mirror of https://github.com/qmk/qmk_firmware.git synced 2024-12-27 20:09:59 +00:00
qmk_firmware/drivers/chibios/i2c_master.c
James Young c66df16644
2020 November 28 Breaking Changes Update ()
* Branch point for 2020 November 28 Breaking Change                                                

* Remove matrix_col_t to allow MATRIX_ROWS > 32 ()                                           

* Add support for soft serial to ATmega32U2 ()                                               

* Change MIDI velocity implementation to allow direct control of velocity value ()            

* Add ability to build a subset of all keyboards based on platform.                                

* Actually use eeprom_driver_init().                                                               

* Make bootloader_jump weak for ChibiOS. ()                                                  

* Joystick 16-bit support ()                                                                 

* Per-encoder resolutions ()                                                                 

* Share button state from mousekey to pointing_device ()                                     

* Add hotfix for chibios keyboards not wake ()                                               

* Add advanced/efficient RGB Matrix Indicators ()                                             

* Naming change.                                                                                   

* Support for STM32 GPIOF,G,H,I,J,K ()                                                       

* Add milc as a dependency and remove the installed milc ()                                  

* ChibiOS upgrade: early init conversions ()                                                 

* ChibiOS upgrade: configuration file migrator ()                                             

* Haptic and solenoid cleanup ()                                                              

* XD75 cleanup ()                                                                            

* OLED display update interval support ()                                                    

* Add definition based on currently-selected serial driver. ()                               

* New feature: Retro Tapping per key ()                                                      

* Allow for modification of output RGB values when using rgblight/rgb_matrix. ()             

* Add housekeeping task callbacks so that keyboards/keymaps are capable of executing code for each main loop iteration. ()

* Rescale both ChibiOS and AVR backlighting.                                                       

* Reduce Helix keyboard build variation ()                                                    

* Minor change to behavior allowing display updates to continue between task ticks ()        

* Some GPIO manipulations in matrix.c change to atomic. ()                                   

* qmk cformat ()                                                                             

* [Keyboard] Update the Speedo firmware for v3.0 ()                                          

* Maartenwut/Maarten namechange to evyd13/Evy ()                                             

* [quantum] combine repeated lines of code ()                                                

* Add step sequencer feature ()                                                               

* aeboards/ext65 refactor ()                                                                 

* Refactor xelus/dawn60 for Rev2 later ()                                                    

* add DEBUG_MATRIX_SCAN_RATE_ENABLE to common_features.mk ()                                 

* [Core] Added `add_oneshot_mods` & `del_oneshot_mods` ()                                    

* update chibios os usb for the otg driver ()                                                 

* Remove HD44780 References, Part 4 ()                                                       

* [Keyboard] Add Valor FRL TKL (+refactor) ()                                                

* Fix cursor position bug in oled_write_raw functions ()                                     

* Fixup version.h writing when using SKIP_VERSION=yes ()                                     

* Allow for certain code in the codebase assuming length of string. ()                       

* Add AT90USB support for serial.c ()                                                        

* Auto shift: support repeats and early registration ()                                       

* Rename ledmatrix.h to match .c file ()                                                      

* Split RGB_MATRIX_ENABLE into _ENABLE and _DRIVER ()                                        

* Split LED_MATRIX_ENABLE into _ENABLE and _DRIVER ()                                        

* Merge point for 2020 Nov 28 Breaking Change
2020-11-28 12:02:18 -08:00

122 lines
4.6 KiB
C

/* 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 "quantum.h"
#include "i2c_master.h"
#include <string.h>
#include <hal.h>
static uint8_t i2c_address;
static const I2CConfig i2cconfig = {
#if defined(USE_I2CV1_CONTRIB)
I2C1_CLOCK_SPEED,
#elif defined(USE_I2CV1)
I2C1_OPMODE,
I2C1_CLOCK_SPEED,
I2C1_DUTY_CYCLE,
#else
// This configures the I2C clock to 400khz assuming a 72Mhz clock
// For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
STM32_TIMINGR_PRESC(I2C1_TIMINGR_PRESC) | STM32_TIMINGR_SCLDEL(I2C1_TIMINGR_SCLDEL) | STM32_TIMINGR_SDADEL(I2C1_TIMINGR_SDADEL) | STM32_TIMINGR_SCLH(I2C1_TIMINGR_SCLH) | STM32_TIMINGR_SCLL(I2C1_TIMINGR_SCLL), 0, 0
#endif
};
static i2c_status_t chibios_to_qmk(const msg_t* status) {
switch (*status) {
case I2C_NO_ERROR:
return I2C_STATUS_SUCCESS;
case I2C_TIMEOUT:
return I2C_STATUS_TIMEOUT;
// I2C_BUS_ERROR, I2C_ARBITRATION_LOST, I2C_ACK_FAILURE, I2C_OVERRUN, I2C_PEC_ERROR, I2C_SMB_ALERT
default:
return I2C_STATUS_ERROR;
}
}
__attribute__((weak)) void i2c_init(void) {
static bool is_initialised = false;
if (!is_initialised) {
is_initialised = true;
// Try releasing special pins for a short time
palSetPadMode(I2C1_SCL_BANK, I2C1_SCL, PAL_MODE_INPUT);
palSetPadMode(I2C1_SDA_BANK, I2C1_SDA, PAL_MODE_INPUT);
chThdSleepMilliseconds(10);
#if defined(USE_GPIOV1)
palSetPadMode(I2C1_SCL_BANK, I2C1_SCL, I2C1_SCL_PAL_MODE);
palSetPadMode(I2C1_SDA_BANK, I2C1_SDA, I2C1_SDA_PAL_MODE);
#else
palSetPadMode(I2C1_SCL_BANK, I2C1_SCL, PAL_MODE_ALTERNATE(I2C1_SCL_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
palSetPadMode(I2C1_SDA_BANK, I2C1_SDA, PAL_MODE_ALTERNATE(I2C1_SDA_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
#endif
}
}
i2c_status_t i2c_start(uint8_t address) {
i2c_address = address;
i2cStart(&I2C_DRIVER, &i2cconfig);
return I2C_STATUS_SUCCESS;
}
i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout) {
i2c_address = address;
i2cStart(&I2C_DRIVER, &i2cconfig);
msg_t status = i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), data, length, 0, 0, TIME_MS2I(timeout));
return chibios_to_qmk(&status);
}
i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout) {
i2c_address = address;
i2cStart(&I2C_DRIVER, &i2cconfig);
msg_t status = i2cMasterReceiveTimeout(&I2C_DRIVER, (i2c_address >> 1), data, length, TIME_MS2I(timeout));
return chibios_to_qmk(&status);
}
i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const 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;
msg_t status = i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), complete_packet, length + 1, 0, 0, TIME_MS2I(timeout));
return chibios_to_qmk(&status);
}
i2c_status_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);
msg_t status = i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), &regaddr, 1, data, length, TIME_MS2I(timeout));
return chibios_to_qmk(&status);
}
void i2c_stop(void) { i2cStop(&I2C_DRIVER); }