topic S32K344 UART0 Issue: Junk Bytes in S32K

S32K344 UART0 Issue: Junk Bytes

aadyaa — Fri, 30 Jun 2023 12:30:27 GMT

I'm facing an issue with the UART0 module on the S32K344 microcontroller. When attempting to send data, I'm encountering the transmission of junk bytes. I have provided the relevant details below:

Microcontroller: S32K344
UART0 pins: PTA3 (UART0_TX) and PTA2 (UART0_RX)
I have attached the Teraterm console output demonstrating the received junk bytes. Additionally, I made the necessary LPUART0 settings in S32 Design Studio, but the issue persists.

It's worth noting that LPUART3 in the same code functions correctly, highlighting the specific problem with UART0.

I kindly request assistance from the NXP community in addressing this issue. If anyone has experience with the S32K344 UART0 module or can provide guidance on DMA usage, your insights would be greatly appreciated.

Re: S32K344 UART0 Issue: Junk Bytes

Robin_Shen — Mon, 03 Jul 2023 07:39:07 GMT

LPUART_0 is clocked by AIPS_PLAT_CLK. But the LPUART3 is clocked by AIPS_SLOW_CLK. Please change the setting of Mcu Clock Frequency Select.

Best Regards,
Robin
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Re: S32K344 UART0 Issue: Junk Bytes

aadyaa — Mon, 03 Jul 2023 10:30:57 GMT

@Robin_Shen Thank you for your support. The issue got resolved with your input.