HAL_UART_TxCpltCallback callback not serviced on completion

[kudiarasum]

Posted on December 29, 2015 at 16:26

I

am developing application for stm32l0 using CUBEmx and keil, my intention is totransmit command to modem and receiveresponse , so I have used to Transmit data and receive data through UART RX DMA.

I am able to transmit data through hlpuart1 ,

huart2

successfully , but unable to getHAL_UART_TxCpltCallback on data reception ,

I have enabled breakpoint and checked Rx and Tx buffer , as expected transmitted data in TxBuffer

received in RXBuffer, But callback has not serviced.

Main loop

if(current_state == IDLE){

                                                                current_state = TRANSMITTING;

                                                                HAL_UART_Receive_DMA(&hlpuart1,RxBuffer,6);

                                                                HAL_UART_Transmit(&hlpuart1,TxBuffer,sizeof(TxBuffer),1000);

                                                                HAL_Delay(5000);

                                                  HAL_UART_Transmit(&huart2,RxBuffer,6,1000);

                                                while(current_state != RECV_READY)   (Control stalled here because current stare  not cleared  by

HAL_UART_TxCpltCallback

)

                                                {

                                                }

                                                HAL_UART_Transmit(&huart2,TxBuffer,6,1000);

                                                current_state = IDLE;

                                 }

void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)

{

current_state = RECV_READY;

}

Any one can throw some light where I made mistake

#stm32l0 #uart2-dma-interrupt

[Amel NASRI]

Posted on December 29, 2015 at 17:47

Hi murugesan.kudiarasu,

HAL_UART_TxCpltCallback is invoked when you are in interrupt mode or DMA mode.In polling mode using HAL_UART_Transmit, this callback is not needed.-Mayla-

[kudiarasum]

Posted on December 30, 2015 at 06:57

Hi Mayla,

Thank for correcting me, By mistake i have used  HAL_UART_TxCpltCallback instead of  HAL_UART_RxCpltCallback ,  already configured DMA to receive data Through LPUART_RX in CubeMX, Even now the callback is not serving on receive complete.

[kudiarasum]

Posted on December 30, 2015 at 07:00

Hi ,

I have attached the latest source (main.c) file ________________ Attachments : main.c : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I1CZ&d=%2Fa%2F0X0000000bjq%2F.jxak7oMpny8nxhMqb0TgpSr10nkDDeFEaf.1rzosqU&asPdf=false

[Amel NASRI]

Posted on December 30, 2015 at 11:15

Himurugesan.kudiarasu,

Is theUARTx_IRQHandler added in your file stm32l0xx_it.c file:

void
USARTx_IRQHandler(
void
)
{
HAL_UART_IRQHandler(&UartHandle);
}

-Mayla-

[kudiarasum]

Posted on December 31, 2015 at 06:11

Hi Mayla,

Yes, its there in the file, please find the attached files stm32l0xx_it.c and main .c ________________ Attachments : main.c : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I1CU&d=%2Fa%2F0X0000000bjo%2F.6tZtqd87hJTJS3b5qKXSUS_Akty7oMAlznFx2ClWNM&asPdf=falsestm32l0xx_it.c : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I12G&d=%2Fa%2F0X0000000bjn%2F2VUhMW6CsLJ8QcsQJKh9aGswUNnGsqW7EzMebn3ciA4&asPdf=false

[Tesla DeLorean]

Posted on December 31, 2015 at 13:51

Expectations dictate that this should be volatile

uart_current_state current_state = IDLE;