topic Re: UART RX interrupt ussye in S32K

UART RX interrupt ussye

547416104 — Sat, 05 Nov 2022 06:06:35 GMT

Hello EveryOne,

I just use the UART module on the MCU:S32K144 100pin, I find the UART interrupt is occured, and read the data, I find the data is same with the uart TX data，as normal design, it is not My wanted data. How can I to config the SDK, and fix the issue.

Re: UART RX interrupt ussye

Robin_Shen — Mon, 07 Nov 2022 03:22:27 GMT

Please refer to the lpuart_echo_s32k144 example in SDK:

Call LPUART_DRV_ReceiveData start receive 1 byte UART data, the 1 byte data is already received into buffer[] after enter UART_EVENT_RX_FULL rxCallback.

Don't know why you call LPUART_DRV_ReceiveData(INST_LPUART0, &uart_Rx_Date, 1u) at line 52, the data should already in in BD18333_Read.RxData[] when enter UART_EVENT_RX_FULL event.

Best Regards,
Robin
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Re: UART RX interrupt ussye

547416104 — Mon, 07 Nov 2022 05:34:08 GMT

Hello Robin，

I just follow your suggest to reconfig the uart module, I find the issue is also occured.

when I sent data through UART, then the RX ISR is callback, debug and find the BD18333_Read.RxData value is same with the TX data.

The hope result is the RX ISR is callback only when UART receive the new data, it should not same with the UART TX data.

Re: UART RX interrupt ussye

Robin_Shen — Mon, 07 Nov 2022 07:56:35 GMT

Please tell me how to reproduce this issue.(Maybe you can send a test project to me)
I tried test uart_pal_echo_s32k144 based on your screenshot and couldn't find the issue.
After call UART_SendData(&uart_instance, txbuffer, 1U); send data output, then call UART_ReceiveData(&uart_instance, buffer, 1U); I didn't see the value in buffer equal to txbuffer.

Re: UART RX interrupt ussye

547416104 — Wed, 09 Nov 2022 03:31:23 GMT

hello Robin, The issue is fixed yesterday, thanks. but I have a new issue now, I can not receive the response data, I wii upload the project files later.

Re: UART RX interrupt ussye

Robin_Shen — Wed, 09 Nov 2022 04:02:58 GMT

You are welcome!
I am glad to hear that it works now.

For new issue, it is recommended to recreate a new question in community.
Thank you for your understanding.

Re: UART RX interrupt ussye

547416104 — Wed, 09 Nov 2022 05:52:43 GMT

Hello Robin,

I just pass a problem "S32K144 UART can not receive data", and attach the uart_pal configure and uart driver code. could you help to check, thanks