RT1021 Use the sample program 'edma_rb_transfer',EDMA_GetRemainingMajorLoopCount() return 0

[jzhou]

Use the sample program 'edma_rb_transfer'  EXAMPLE_LPUART_IRQHandler().

• The emergence of probability EDMA_GetRemainingMajorLoopCount() return 0,

  • Data receiving is abnormal.

  •  
  • What are the reasons that cause it to return 0? How can you avoid this problem?

  • The problem is probabilistic.

  •  
  • • void EXAMPLE_LPUART_IRQHandler(void)
      {
          uint32_t status            = LPUART_GetStatusFlags(EXAMPLE_LPUART);
          uint32_t enabledInterrupts = LPUART_GetEnabledInterrupts(EXAMPLE_LPUART);
       portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
          /* If new data arrived. */
          if ((0U != ((uint32_t)kLPUART_IdleLineFlag & status)) &&
              (0U != ((uint32_t)kLPUART_IdleLineInterruptEnable & enabledInterrupts)))
          {
              (void)LPUART_ClearStatusFlags(EXAMPLE_LPUART, kLPUART_IdleLineFlag);
              isIdleLineDetected = true;
              receivedBytes      = EXAMPLE_RING_BUFFER_SIZE -
                              EDMA_GetRemainingMajorLoopCount(EXAMPLE_LPUART_DMA_BASEADDR, LPUART_RX_DMA_CHANNEL);
              receivedBytes += (EXAMPLE_RING_BUFFER_SIZE * ringBufferFlag) - ringBufferIndex;
      
        EXAMPLE_ReadRingBuffer(g_ringBuffer, g_rxBuffer, receivedBytes);
      
              if (receivedBytes > 32U)
              {
                  __NOP();
              }
          }
          LPUART_TransferEdmaHandleIRQ(EXAMPLE_LPUART, &g_lpuartEdmaHandle);
          SDK_ISR_EXIT_BARRIER;
      }

[pierre_denis]

Hello Pavel,

Any update on this issue? We are also concerned.

Thank you in advance.

Regards

[Pavel_Hernandez]

Hello, sorry for the late response, I review the information and I see what you mentioned, I did a report about your comment to the SDK. 

Best regards,
Pavel

[Pavel_Hernandez]

Hello, my name is Pavel, and I will be supporting your case, let me get into your case and when I have more information, I will contact you.

Best regards,
Pavel

[jzhou]

@Pavel_Hernandez 

Hi, Pavel

• Thank you for your reply. Is there any progress on this issue?

•