PN7642, LPUART examples not working

Parmiss — Fri, 17 May 2024 10:31:39 GMT

Hi,

I have problems with lpuart poll/interrupt examples on devkit OM27642EVK. PN7642 SDK 2.12.5.

There is a wait inside LPUART_Init() which makes the mcu reset over and over:
PN76_Common_Wait(50);
I tried removing this wait and added a for loop instead. Then, there is no reset but I only see some junk on putty when it tries to write the app starting msg. And if I type in putty to get an echo, LPUART_PollReceive fails.

I have set the jumpers/switches according to the readme and I use ftdi cable and putty to send/receive uart packets. Is there any common/obvious mistake in my setup?
Why should PN76_Common_Wait() fail? Can I just replace it?

Re: PN7642, LPUART examples not working

danielchen — Sat, 07 Sep 2024 12:57:10 GMT

I know this problem is fixed; it is happened on the PN7642 previous versions , the possible solution is to update the software of the PN7642 , the latest version can be found at the installation folder of cockpit. Or you can run demo pnev7642fama_check_nxpfw_update to update firmware to the latest version.

If you can not update the binary in mass storage mode, please refer to below thread.

Solved: PN7642 Mass Storage Device Activation - NXP Community

In case other customers are having the same issue, I hope this can help.

topic PN7642, LPUART examples not working in Other NXP Products

PN7642, LPUART examples not working

Re: PN7642, LPUART examples not working