How does HAL_UART_Transmit_IT() triggered Interrupt handler HAL_UART_IRQHandler() for data sending?
HAL_StatusTypeDef HAL_UART_Transmit_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size){ /* Check that a Tx process is not already ongoing */ if (huart->gState == HAL_UART_STATE_READY) { if ((pData == NULL) || (Size == 0U)) { return HAL_...