UART + DMA and IDLE line interrupt with HAL layer does not work as expected Hello,I am trying to update some code to use UART with DMA for receiving instead of the polling method.I want the implementation to work for messages of unknown length so I use the HAL_UARTEx_ReceiveToIdle_DMA function.I know that the maximum message length i can receive is MAX_LEN (=1024) so I call HAL_UARTEx_ReceiveToIdle_DMA(&huart2, my_buffer, MAX_LEN)The problem I noticed is that sometimes when I get in the HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size) , the value of "Size" is equal to 1 even though I send 5 bytes in the UART. From what i understand, that this is because in the HAL_UART_IRQHandler (that is called when the line goes IDLE), there is this code:[...]
/* Check if DMA mode is enabled in UART */
if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
{
/* DMA mode enabled */
/* Check received length : If all expected data are received, do nothing,
(DMA cplt callback will be called).
Otherwise, if at least one data has already b
