STM32 I2C RTOS 完整代码

uint8_t *i2c_data;
TaskHandle_t pendingTask;

void I2C1_EV_IRQHandler() {
  if (LL_I2C_IsActiveFlag_TXIS(I2C1))
    LL_I2C_TransmitData8(I2C1, (*i2c_data++));
  if (LL_I2C_IsActiveFlag_RXNE(I2C1))
    *i2c_data++ = LL_I2C_ReceiveData8(I2C1);
  if (LL_I2C_IsActiveFlag_STOP(I2C1)) {
    xTaskNotifyFromISR(pendingTask, 0, 0, NULL);
    LL_I2C_ClearFlag_STOP(I2C1);
  }
}

void I2C_TX_RTOS(uint8_t addr, uint8_t *data, uint8_t len) {
  i2c_data = data;
  pendingTask = xTaskGetCurrentTaskHandle();

  LL_I2C_HandleTransfer(I2C1, addr, LL_I2C_ADDRSLAVE_7BIT,
                        len, LL_I2C_MODE_AUTOEND,
                        LL_I2C_GENERATE_START_WRITE);
  xTaskNotifyWait(0, 0, NULL, portMAX_DELAY);
}

void I2C_RX_RTOS(uint8_t addr, uint8_t *data, uint8_t len) {
  i2c_data = data;
  pendingTask = xTaskGetCurrentTaskHandle();

  LL_I2C_HandleTransfer(I2C1, addr, LL_I2C_ADDRSLAVE_7BIT,
                        len, LL_I2C_MODE_AUTOEND,
                        LL_I2C_GENERATE_START_READ);
  xTaskNotifyWait(0, 0, NULL, portMAX_DELAY);
}

void I2C_Test_Task() {
  LL_I2C_EnableIT_TX(I2C1);
  LL_I2C_EnableIT_RX(I2C1);
  LL_I2C_EnableIT_STOP(I2C1);

  const uint8_t addr = 0x39 << 1;
  uint8_t data[2] = {0x42, 0b00010010};
  I2C_TX_RTOS(addr, data, sizeof(data));
  while (1) {
    vTaskDelay(100);
    uint8_t data2[1] = {0x56};
    I2C_TX_RTOS(addr, data2, sizeof(data2));
    uint8_t data_read[2];
    I2C_RX_RTOS(addr, data_read, sizeof(data_read));
    printf("CLEAR = %u\n", data_read[0] + (data_read[1] << 8));
  }
}

void StartDefaultTask(void *argument)
{
  /* USER CODE BEGIN 5 */
  I2C_Test_Task();
  /* USER CODE END 5 */
}

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