view Small_CPU/Inc/i2c.h @ 328:4fe5400567e7 I2C_Improvment

Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery The errata describes a possible problem in operation between 88kHz and 100kHz => Set speed as recommended as work around. Based on reference implementation only one filter should be use. Choice was digital because only drawback is lag of wakeup functionality which is not used I2C communication may be randomly interrupted e.g. by a RTE reset or firmware update => reworked recovery function to get I2C devices in idle state again (Clk and SDA HIGH)
author ideenmodellierer
date Wed, 17 Jul 2019 22:42:15 +0200
parents 9ecc2e60418d
children cb3870f79e9d
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/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef I2C_H
#define I2C_H

/* Pressure Sensor */
#define DEVICE_PRESSURE        			0xEE 	// 2019 hardware (gen 3) will use 0xEC (MS5837), all other use 0xEE (MS5803)

/* Compass/Accelerometer */
#define DEVICE_ACCELARATOR_MMA8452Q 	0x38	// Hardware gen 1 (Two chip solution with MMA8452Q and HMC5883L)
#define DEVICE_COMPASS_HMC5883L			0x3C	// Hardware gen 1

#define DEVICE_COMPASS_303D				0x3C 	// Hardware gen 2 (Single chip solution LSM303D)
#define	DEVICE_COMPASS_303AGR			0x3C	// Hardware gen 3 (Single chip solution LSM303AGR)

/* Battery Gas Gauge */
#define DEVICE_BATTERYGAUGE 			0xC8 	// LTC2941 battery gauge


/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"

HAL_StatusTypeDef I2C_Master_Transmit(  uint16_t DevAddress, uint8_t *pData, uint16_t Size);
HAL_StatusTypeDef I2C_Master_TransmitNoStop(  uint16_t DevAddress, uint8_t *pData, uint16_t Size);
HAL_StatusTypeDef I2C_Master_Receive(  uint16_t DevAddress, uint8_t *pData, uint16_t Size);
HAL_StatusTypeDef MX_I2C1_Init(void);
void I2C_DeInit(void);
HAL_StatusTypeDef I2C1_Status(void);

GPIO_PinState MX_I2C1_TestAndClear(void);

//void I2C_Error(void);


#endif /* I2C_H */