STM32F103 I2C BUSY FLAG Fix

gistfile1.txt

	GPIO_InitTypeDef GPIO_I2CInitStructure;
    /*Workaround p26 errata STM32F103*/
	__HAL_I2C_DISABLE(&hi2c1);
	//OD HIGHG
	GPIO_I2CInitStructure.Pin = I2C_SCL_PIN | I2C_SDA_PIN;
	GPIO_I2CInitStructure.Mode = GPIO_MODE_OUTPUT_OD;
	GPIO_I2CInitStructure.Pull = GPIO_PULLUP;
	HAL_GPIO_Init(I2C_PORT, &GPIO_I2CInitStructure);
	HAL_GPIO_WritePin(I2C_PORT, I2C_SCL_PIN, GPIO_PIN_SET);
	HAL_GPIO_WritePin(I2C_PORT, I2C_SDA_PIN, GPIO_PIN_SET);

	while(HAL_GPIO_ReadPin(I2C_PORT,I2C_SCL_PIN != GPIO_PIN_SET)
			&& HAL_GPIO_ReadPin(I2C_PORT,I2C_SCL_PIN != GPIO_PIN_SET));

	//OD SDA LOW
//	GPIO_I2CInitStructure.Pin = I2C_SDA_PIN;
//	GPIO_I2CInitStructure.Mode = GPIO_MODE_OUTPUT_OD;
//	GPIO_I2CInitStructure.Pull = GPIO_PULLDOWN;
//	HAL_GPIO_Init(POWERON_PORT, &GPIO_InitStructure);
	HAL_GPIO_WritePin(I2C_PORT, I2C_SDA_PIN, GPIO_PIN_RESET);
	while(HAL_GPIO_ReadPin(I2C_PORT,I2C_SDA_PIN != GPIO_PIN_RESET));
	//OD SDA LOW
//	GPIO_I2CInitStructure.Pin = I2C_SCL_PIN;
//	GPIO_I2CInitStructure.Mode = GPIO_MODE_OUTPUT_OD;
//	GPIO_I2CInitStructure.Pull = GPIO_PULLDOWN;
	HAL_GPIO_Init(I2C_PORT, &GPIO_I2CInitStructure);
	HAL_GPIO_WritePin(I2C_PORT, I2C_SCL_PIN, GPIO_PIN_RESET);
	while(HAL_GPIO_ReadPin(I2C_PORT,I2C_SCL_PIN != GPIO_PIN_RESET));
	//OD SDA LOW
//	GPIO_I2CInitStructure.Pin = I2C_SDA_PIN;
//	GPIO_I2CInitStructure.Mode = GPIO_MODE_OUTPUT_OD;
//	GPIO_I2CInitStructure.Pull = GPIO_PULLUP;
//	HAL_GPIO_Init(POWERON_PORT, &GPIO_InitStructure);
	HAL_GPIO_WritePin(I2C_PORT, I2C_SDA_PIN, GPIO_PIN_SET);
	while(HAL_GPIO_ReadPin(I2C_PORT,I2C_SDA_PIN != GPIO_PIN_SET));
	//OD SDA LOW
//	GPIO_I2CInitStructure.Pin = I2C_SCL_PIN;
//	GPIO_I2CInitStructure.Mode = GPIO_MODE_OUTPUT_OD;
//	GPIO_I2CInitStructure.Pull = GPIO_PULLUP;
//	HAL_GPIO_Init(POWERON_PORT, &GPIO_InitStructure);
	HAL_GPIO_WritePin(I2C_PORT, I2C_SCL_PIN, GPIO_PIN_SET);
	while(HAL_GPIO_ReadPin(I2C_PORT,I2C_SCL_PIN != GPIO_PIN_SET));

	GPIO_I2CInitStructure.Pin = I2C_SCL_PIN | I2C_SDA_PIN;
	GPIO_I2CInitStructure.Mode = GPIO_MODE_AF_OD;
	GPIO_I2CInitStructure.Pull = GPIO_PULLUP;
	HAL_GPIO_Init(I2C_PORT, &GPIO_I2CInitStructure);

	__HAL_RCC_AFIO_CLK_ENABLE();
    __HAL_AFIO_REMAP_I2C1_ENABLE();

    hi2c1.Instance->CR1 |=  I2C_CR1_SWRST;
    hi2c1.Instance->CR1 &=  ~I2C_CR1_SWRST;

	__HAL_I2C_ENABLE(&hi2c1);