* 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.
*/
+#pragma once
#include "ch.h"
#include <hal.h>
+
+#if defined(STM32F1XX) || defined(STM32F1xx) || defined(STM32F2xx) || defined(STM32F4xx) || defined(STM32L0xx) || defined(STM32L1xx)
+ #define USE_I2CV1
+#endif
+
+#ifdef I2C1_BANK
+ #define I2C1_SCL_BANK I2C1_BANK
+ #define I2C1_SDA_BANK I2C1_BANK
+#endif
+
+#ifndef I2C1_SCL_BANK
+ #define I2C1_SCL_BANK GPIOB
+#endif
+
+#ifndef I2C1_SDA_BANK
+ #define I2C1_SDA_BANK GPIOB
+#endif
+
+#ifndef I2C1_SCL
+ #define I2C1_SCL 6
+#endif
+#ifndef I2C1_SDA
+ #define I2C1_SDA 7
+#endif
+
+#ifdef USE_I2CV1
+ #ifndef I2C1_OPMODE
+ #define I2C1_OPMODE OPMODE_I2C
+ #endif
+ #ifndef I2C1_CLOCK_SPEED
+ #define I2C1_CLOCK_SPEED 100000 /* 400000 */
+ #endif
+ #ifndef I2C1_DUTY_CYCLE
+ #define I2C1_DUTY_CYCLE STD_DUTY_CYCLE /* FAST_DUTY_CYCLE_2 */
+ #endif
+#else
+ // The default PAL alternate modes are used to signal that the pins are used for I2C
+ #ifndef I2C1_SCL_PAL_MODE
+ #define I2C1_SCL_PAL_MODE 4
+ #endif
+ #ifndef I2C1_SDA_PAL_MODE
+ #define I2C1_SDA_PAL_MODE 4
+ #endif
+
+ // The default timing values below configures the I2C clock to 400khz assuming a 72Mhz clock
+ // For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
+ #ifndef I2C1_TIMINGR_PRESC
+ #define I2C1_TIMINGR_PRESC 15U
+ #endif
+ #ifndef I2C1_TIMINGR_SCLDEL
+ #define I2C1_TIMINGR_SCLDEL 4U
+ #endif
+ #ifndef I2C1_TIMINGR_SDADEL
+ #define I2C1_TIMINGR_SDADEL 2U
+ #endif
+ #ifndef I2C1_TIMINGR_SCLH
+ #define I2C1_TIMINGR_SCLH 15U
+ #endif
+ #ifndef I2C1_TIMINGR_SCLL
+ #define I2C1_TIMINGR_SCLL 21U
+ #endif
+#endif
+
#ifndef I2C_DRIVER
#define I2C_DRIVER I2CD1
#endif
+typedef int16_t i2c_status_t;
+
+#define I2C_STATUS_SUCCESS (0)
+#define I2C_STATUS_ERROR (-1)
+#define I2C_STATUS_TIMEOUT (-2)
+
void i2c_init(void);
-uint8_t i2c_start(uint8_t address);
-uint8_t i2c_transmit(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout);
-uint8_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout);
-uint8_t i2c_transmit_receive(uint8_t address, uint8_t * tx_body, uint16_t tx_length, uint8_t * rx_body, uint16_t rx_length);
-uint8_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
-uint8_t i2c_readReg(uint8_t devaddr, uint8_t* regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
-uint8_t i2c_stop(uint16_t timeout);
+i2c_status_t i2c_start(uint8_t address);
+i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_transmit_receive(uint8_t address, uint8_t * tx_body, uint16_t tx_length, uint8_t * rx_body, uint16_t rx_length);
+i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
+void i2c_stop(void);