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187
workspace/TS100/Core/Src/FRToSI2C.cpp
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187
workspace/TS100/Core/Src/FRToSI2C.cpp
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/*
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* FRToSI2C.cpp
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*
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* Created on: 14Apr.,2018
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* Author: Ralim
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*/
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#include "hardware.h"
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#include "FRToSI2C.hpp"
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#define I2CUSESDMA
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I2C_HandleTypeDef* FRToSI2C::i2c;
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SemaphoreHandle_t FRToSI2C::I2CSemaphore;
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void FRToSI2C::CpltCallback() {
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i2c->State = HAL_I2C_STATE_READY; // Force state reset (even if tx error)
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if (I2CSemaphore) {
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xSemaphoreGiveFromISR(I2CSemaphore, NULL);
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}
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}
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void FRToSI2C::Mem_Read(uint16_t DevAddress, uint16_t MemAddress,
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uint16_t MemAddSize, uint8_t* pData, uint16_t Size) {
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if (I2CSemaphore == NULL) {
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// no RToS, run blocking code
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HAL_I2C_Mem_Read(i2c, DevAddress, MemAddress, MemAddSize, pData, Size,
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5000);
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} else {
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// RToS is active, run threading
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// Get the mutex so we can use the I2C port
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// Wait up to 1 second for the mutex
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if (xSemaphoreTake(I2CSemaphore, (TickType_t)50) == pdTRUE) {
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#ifdef I2CUSESDMA
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if (HAL_I2C_Mem_Read(i2c, DevAddress, MemAddress, MemAddSize,
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pData, Size,500) != HAL_OK) {
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I2C1_ClearBusyFlagErratum();
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xSemaphoreGive(I2CSemaphore);
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}
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xSemaphoreGive(I2CSemaphore);
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#else
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HAL_I2C_Mem_Read(i2c, DevAddress, MemAddress, MemAddSize, pData, Size,
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5000);
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xSemaphoreGive(I2CSemaphore);
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#endif
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} else {
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}
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}
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}
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void FRToSI2C::I2C_RegisterWrite(uint8_t address, uint8_t reg, uint8_t data) {
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Mem_Write(address, reg, I2C_MEMADD_SIZE_8BIT, &data, 1);
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}
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uint8_t FRToSI2C::I2C_RegisterRead(uint8_t add, uint8_t reg) {
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uint8_t tx_data[1];
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Mem_Read(add, reg, I2C_MEMADD_SIZE_8BIT, tx_data, 1);
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return tx_data[0];
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}
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void FRToSI2C::Mem_Write(uint16_t DevAddress, uint16_t MemAddress,
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uint16_t MemAddSize, uint8_t* pData, uint16_t Size) {
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if (I2CSemaphore == NULL) {
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// no RToS, run blocking code
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HAL_I2C_Mem_Write(i2c, DevAddress, MemAddress, MemAddSize, pData, Size,
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5000);
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} else {
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// RToS is active, run threading
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// Get the mutex so we can use the I2C port
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// Wait up to 1 second for the mutex
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if (xSemaphoreTake(I2CSemaphore, (TickType_t)50) == pdTRUE) {
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#ifdef I2CUSESDMA
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if (HAL_I2C_Mem_Write(i2c, DevAddress, MemAddress, MemAddSize,
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pData, Size,500) != HAL_OK) {
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I2C1_ClearBusyFlagErratum();
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xSemaphoreGive(I2CSemaphore);
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}
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xSemaphoreGive(I2CSemaphore);
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#else
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if (HAL_I2C_Mem_Write(i2c, DevAddress, MemAddress, MemAddSize, pData,
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Size, 5000) != HAL_OK) {
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}
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xSemaphoreGive(I2CSemaphore);
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#endif
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} else {
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}
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}
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}
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void FRToSI2C::Transmit(uint16_t DevAddress, uint8_t* pData, uint16_t Size) {
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if (I2CSemaphore == NULL) {
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// no RToS, run blocking code
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HAL_I2C_Master_Transmit(i2c, DevAddress, pData, Size, 5000);
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} else {
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// RToS is active, run threading
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// Get the mutex so we can use the I2C port
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// Wait up to 1 second for the mutex
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if (xSemaphoreTake(I2CSemaphore, (TickType_t)50) == pdTRUE) {
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#ifdef I2CUSESDMA
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if (HAL_I2C_Master_Transmit_DMA(i2c, DevAddress, pData, Size)
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!= HAL_OK) {
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I2C1_ClearBusyFlagErratum();
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xSemaphoreGive(I2CSemaphore);
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}
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#else
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HAL_I2C_Master_Transmit(i2c, DevAddress, pData, Size, 5000);
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xSemaphoreGive(I2CSemaphore);
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#endif
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} else {
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}
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}
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}
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void FRToSI2C::I2C1_ClearBusyFlagErratum() {
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GPIO_InitTypeDef GPIO_InitStruct;
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int timeout = 100;
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int timeout_cnt = 0;
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// 1. Clear PE bit.
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i2c->Instance->CR1 &= ~(0x0001);
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/**I2C1 GPIO Configuration
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PB6 ------> I2C1_SCL
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PB7 ------> I2C1_SDA
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*/
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// 2. Configure the SCL and SDA I/Os as General Purpose Output Open-Drain, High level (Write 1 to GPIOx_ODR).
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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GPIO_InitStruct.Pin = SCL_Pin;
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HAL_GPIO_Init(SCL_GPIO_Port, &GPIO_InitStruct);
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HAL_GPIO_WritePin(SCL_GPIO_Port, SCL_Pin, GPIO_PIN_SET);
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GPIO_InitStruct.Pin = SDA_Pin;
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HAL_GPIO_Init(SDA_GPIO_Port, &GPIO_InitStruct);
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HAL_GPIO_WritePin(SDA_GPIO_Port, SDA_Pin, GPIO_PIN_SET);
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while (GPIO_PIN_SET != HAL_GPIO_ReadPin(SDA_GPIO_Port, SDA_Pin)) {
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//Move clock to release I2C
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HAL_GPIO_WritePin(SCL_GPIO_Port, SCL_Pin, GPIO_PIN_RESET);
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asm("nop");
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asm("nop");
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asm("nop");
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asm("nop");
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HAL_GPIO_WritePin(SCL_GPIO_Port, SCL_Pin, GPIO_PIN_SET);
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timeout_cnt++;
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if (timeout_cnt > timeout)
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return;
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}
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// 12. Configure the SCL and SDA I/Os as Alternate function Open-Drain.
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GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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GPIO_InitStruct.Pin = SCL_Pin;
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HAL_GPIO_Init(SCL_GPIO_Port, &GPIO_InitStruct);
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GPIO_InitStruct.Pin = SDA_Pin;
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HAL_GPIO_Init(SDA_GPIO_Port, &GPIO_InitStruct);
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HAL_GPIO_WritePin(SCL_GPIO_Port, SCL_Pin, GPIO_PIN_SET);
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HAL_GPIO_WritePin(SDA_GPIO_Port, SDA_Pin, GPIO_PIN_SET);
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// 13. Set SWRST bit in I2Cx_CR1 register.
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i2c->Instance->CR1 |= 0x8000;
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asm("nop");
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// 14. Clear SWRST bit in I2Cx_CR1 register.
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i2c->Instance->CR1 &= ~0x8000;
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asm("nop");
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// 15. Enable the I2C peripheral by setting the PE bit in I2Cx_CR1 register
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i2c->Instance->CR1 |= 0x0001;
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// Call initialization function.
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HAL_I2C_Init(i2c);
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}
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