topic Re: mpc5748g uart rx dma and timeout problem in MPC5xxx

mpc5748g uart rx dma and timeout problem

1113240626 — Wed, 23 Apr 2025 01:48:06 GMT

I use mpc5748g to develop uart rx dma and timeout feature. But I encountered some problems.When I configured the program and ran it, the first rx timeout interrupt could enter and read data normally, but after that, the timeout interrupt kept triggering and I couldn't clear it. please help me!!

Re: mpc5748g uart rx dma and timeout problem

PetrS — Tue, 29 Apr 2025 07:41:20 GMT

Hi,

what is UARTPTO register setting. Does a UARTCTO reset on timeout?
You can try to set/clear SR bit on timeout as description of TO bit shows.

BR, Petr

Re: mpc5748g uart rx dma and timeout problem

1113240626 — Mon, 12 May 2025 02:19:05 GMT

Thank you for your reply!!

I have tried the following points, but none of them worked。

1、write UARTPTO for clear UARTCTO.

2、write 1 to TO bit。