2054475_en-US

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S32K314 UART DMA transfer, how to call Lpuart_1_Uart_Ip_DmaTxCompleteCallback();

with S32K314, I am debugging Uart_AsyncSend on PIN140/PTC7/LPUART1_TX.

I plan to use DMA mode, the MCAL is generated with tresos studio 28.2

I can captuer the UART output data with oscilloscope, and the data is right what I send out.

But unfortunately, only one time transfer is OK.

After one time transfer, UartState/IsTxBusy is always '1'.

BytesRemaining is always the data length of what I sent and won't decrease, although the data already appeared on oscilloscope screen.

I think it is caused by Lpuart_1_Uart_Ip_DmaTxCompleteCallback().

After one major DMA loop, Lpuart_1_Uart_Ip_DmaTxCompleteCallback() will be triggered by interrupt. Is it right?

With PE debugger, I can not get the breakpoint in Lpuart_1_Uart_Ip_DmaTxCompleteCallback().

So I think there must be any errors to trigger Lpuart_1_Uart_Ip_DmaTxCompleteCallback().

could you tell me how to trigger Lpuart_1_Uart_Ip_DmaTxCompleteCallback() after UART DMA transfer completed?

Thanks

Re: S32K314 UART DMA transfer, how to call Lpuart_1_Uart_Ip_DmaTxCompleteCallback();

Hello @gufengzi,

The RM driver is the Resource driver in your RTD 2.0.3 configurator.

Anyway, the NVIC ISER registers are configured in Platform_Init().

Do you call the function?

Thank you,

BR, Daniel

Re: S32K314 UART DMA transfer, how to call Lpuart_1_Uart_Ip_DmaTxCompleteCallback();

hello Daniel,

I can not find DMAMUX and RM in my EB project.

Sorry the whole project can not be shared. how to create a support ticket?

Additionally, after I set 0xE000E100 to "1", it works well.

I think the reason is that I did not set the corresponding NVIC_ISER correctly.

Could you tell me how to set NVIC_ISER bit in EB project?

Thanks

Re: S32K314 UART DMA transfer, how to call Lpuart_1_Uart_Ip_DmaTxCompleteCallback();

Thank you, that looks correct.

What about the DMAMUX configuration in the RM configurator, can you share it?

Or can you share the whole project so that I can check it and test it on my side?

If you don't want to share it here, consider creating a support ticket.

Regards,

Daniel

Re: S32K314 UART DMA transfer, how to call Lpuart_1_Uart_Ip_DmaTxCompleteCallback();

do you think the handler is Dma0_Ch0_IRQHander?

I already configured it.

Re: S32K314 UART DMA transfer, how to call Lpuart_1_Uart_Ip_DmaTxCompleteCallback();

Hello @gufengzi,

I don't see the handler funtions in the screenshot you posted.

An example is attached to the case, it is for S32DS, but the configurator is very similar.

Regards,

Daniel

Re: S32K314 UART DMA transfer, how to call Lpuart_1_Uart_Ip_DmaTxCompleteCallback();

I already checked DMATCD0_IRQn.

Re: S32K314 UART DMA transfer, how to call Lpuart_1_Uart_Ip_DmaTxCompleteCallback();

Hello @gufengzi,

Did you enable the DMA interrupts in the PLATFORM configurator?

Thank you