What is the USART boot protocol?

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by Grant.Edwards on Thu Apr 11 10:04:26 MST 2013
I'm trying to boot a Keil MCB1857 eval board through
USART 3, and the protocol described in the NXP user's
manual appears to be wrong.

I send a 0x3f as described in the NXP user manual,
and I expected to get back the string "OK\r\n", but
instead I get back "Syncrhonized\r\n".

So, I change my code to accept "Synchronized" instead
of "OK".  After I send the header and the file, I
expect to get back "OK\r\n" or "FAILED\r\n".  But, I
get neither -- I get back three bytes: "\xda\x00\r".

Where can I find a document describing the protocol
used to to download a binary to the LPC1800 when
booting via USART?