LPCXpresso824 MAX won't autobaud for ISP

scruffmeister — Tue, 10 Sep 2024 20:42:12 GMT

I have an LPCXpresso824 MAX board. I know that it is working as I can run the SDK examples for the UART and of course "blinky".

I am trying to put it into ISP mode and load a file using Flashmagic. With blinky loaded (so I know if user code is running) I hold down SW2 and reset the board before releasing SW2.

This should put the board into ISP mode and I can see that my LED no longer blinks suggesting user code is not running.

I then try to synchronize using Flashmagic (9600 baud) but it times out as "failed to autobaud". I have tried:

1. Both settings for JP3 (board is RevC)

2. Restarting into ISP mode while holding SW2 both with "reset SW3" and by physically disconnecting/reconnecting the USB cable.

I must be missing something, what am I doing wrong?

Re: LPCXpresso824 MAX won't autobaud for ISP

Alice_Yang — Wed, 11 Sep 2024 07:39:16 GMT

Hello @scruffmeister

Please make sure connect the correct UART pins. Use PIO0_0 as RXD and PIO0_4 as TXD.

Alice_Yang_0-1726040258438.png

Not the J3 on board.

Alice

topic LPCXpresso824 MAX won't autobaud for ISP in LPC Microcontrollers

LPCXpresso824 MAX won't autobaud for ISP

Re: LPCXpresso824 MAX won't autobaud for ISP