Solved
STM32 WB55 Nucleo I2c3
Hi
I`m trying to read temperature from a Sensirion STS3X sensor using I2C3 with PB13 and PB14 configured
My problem is , during tranmission I2C_WaitOnTXISFlagUntilTimeout returns HAL_ERROR and I can`t talk to sensor.
I have used Cube project to generate files
I2C Init
static void MX_I2C3_Init(void)
{
/* USER CODE BEGIN I2C3_Init 0 */
/* USER CODE END I2C3_Init 0 */
/* USER CODE BEGIN I2C3_Init 1 */
/* USER CODE END I2C3_Init 1 */
hi2c3.Instance = I2C3;
hi2c3.Init.Timing = 0x20502B38;
hi2c3.Init.OwnAddress1 = 0;
hi2c3.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c3.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c3.Init.OwnAddress2 = 0;
hi2c3.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
hi2c3.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c3.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c3) != HAL_OK)
{
Error_Handler();
}
/** Configure Analogue filter
*/
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c3, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
{
Error_Handler();
}
/** Configure Digital filter
*/
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c3, 0) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN I2C3_Init 2 */
/* USER CODE END I2C3_Init 2 */
}main loop
while (1)
{
int32_t temperature;
float temperature_degree;
sts3x_measure_blocking_read(&temperature);
temperature_degree = temperature / 1000.0f;
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}sensor readings
void sts3x_measure_blocking_read(int32_t *temperature) {
sts3x_measure();
HAL_Delay(50);
sts3x_read(temperature);
HAL_Delay(50);
}
void sts3x_measure()
{
if(HAL_I2C_Master_Transmit(&hi2c3, STS3X_ADDRESS, sts3x_cmd_measure, 1, HAL_MAX_DELAY) != HAL_OK)
{
Error_Handler();
}
}
void sts3x_read(int32_t *temperature) {
uint16_t word;
if(HAL_I2C_Master_Receive(&hi2c3, STS3X_ADDRESS, &word, 2, HAL_MAX_DELAY)!= HAL_OK)
{
Error_Handler();
}
*temperature = ((21875 * (int32_t) word) >> 13) - 45000;
}
/* USER CODE END 4 */for some reason , I receive error while transmitting
while (hi2c->XferCount > 0U)
{
/* Wait until TXIS flag is set */
if (I2C_WaitOnTXISFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
return HAL_ERROR; //Everytime I endup here
}
/* Write data to TXDR */And on the line levels SCL and SDA does not change,. But if I set them as GPIO Outputs and set/reset them I can monitor the change.
Has anyone experienced this ? I`m not sure what Am I doing wrong
Thanks