Posted on October 09, 2017 at 19:27I have been trying to get this to work for a few days now, read over several topics here and nothing I have tried has worked...
I tried all the suggestions here as well
https://community.st.com/0D50X00009XkXWwSAN
nothing helps.
I am trying to use the I2C HAL in slave mode, and none of the callbacks get called. I turn an LED on in I2C1_IRQHandler but none of the callbacks seem to get called. Also, even after resetting the CPU the code acts as if there is data ready to be read even before I start a transaction.
Start.
Get Data? 0, 2
WHILE: Wait for I2C: 22
WHILE: Wait for I2C: 22
WHILE: Wait for I2C: 22
Code below:
/**
* @brief This function handles I2C1 event global interrupt / I2C1 wake-up interrupt through EXTI line 23.
*/
void I2C1_IRQHandler(void)
{
/* USER CODE BEGIN I2C1_IRQn 0 */
HAL_GPIO_WritePin(PWR_LED_GPIO_Port, PWR_LED_Pin, 1); // LED Turns on here - as expected
/* USER CODE END I2C1_IRQn 0 */
if (hi2c1.Instance->ISR & (I2C_FLAG_BERR | I2C_FLAG_ARLO | I2C_FLAG_OVR)) {
HAL_I2C_ER_IRQHandler(&hi2c1);
HAL_GPIO_WritePin(PWR_LED_GPIO_Port, PWR_LED_Pin, 0); // NO errors so LED stays on.
} else {
HAL_I2C_EV_IRQHandler(&hi2c1);
}
/* USER CODE BEGIN I2C1_IRQn 1 */
/* USER CODE END I2C1_IRQn 1 */
}
int main(void)
{
/* USER CODE BEGIN 1 */
char buf[64];
int ret;
char buffer[128];
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_I2C1_Init();
MX_USART2_UART_Init();
/* Initialize interrupts */
MX_NVIC_Init();
/* USER CODE BEGIN 2 */
snprintf(buffer, 128, 'Start.\r\n');
HAL_UART_Transmit(&huart2, (uint8_t *)buffer, strlen(buffer), 1000);
while ((ret = HAL_I2C_GetState(&hi2c1)) != HAL_I2C_STATE_READY)
{
snprintf(buffer, 128, 'Wait for I2C: %x\r\n', ret);
HAL_UART_Transmit(&huart2, (uint8_t *)buffer, strlen(buffer), 1000);
HAL_Delay(1000);
}
//ret = HAL_I2C_Slave_Receive_IT(&hi2c1, buf, sizeof(buf));
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);
HAL_Delay(100);
ret = HAL_I2C_Slave_Receive_IT(&hi2c1, buf, 1); // Always returns data even if I never did an I2C transcation.
snprintf(buffer, 128, 'Get Data? %d, %x\r\n', ret, buf[0]);
HAL_UART_Transmit(&huart2, (uint8_t *)buffer, strlen(buffer), 1000);
while ((ret = HAL_I2C_GetState(&hi2c1)) != HAL_I2C_STATE_READY)
{ // code gets stuck here forever
snprintf(buffer, 128, 'WHILE: Wait for I2C: %x\r\n', ret);
HAL_UART_Transmit(&huart2, (uint8_t *)buffer, strlen(buffer), 1000);
HAL_Delay(1000);
}
//ret = HAL_I2C_Slave_Receive(&hi2c1, buf, sizeof(buf), 100);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
Has anyone got Interrupt driven I2C Slave to work with STM32Cube? Most of the questions/discussions I have read here seem to have not been solved... Should I just switch to another serial interface, or processor?
Any help greatly appreciated.
Thanks,
Mike
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