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Author Topic: lpc2129 problem  (Read 1234 times)
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riteshjain_82
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« on: May 25, 2009, 12:11:39 12:11 »

Hello
i have design a lpc2129 board in which i have facing problem in ISP.
while debugging i found the after sending '?' char on serial terminal it send "Synchronized<CR><LF>" properly but after i again send "Synchronized<CR><LF>" back it send garbage value and communicate disturb so ISP couldn't perform can anyone help where is the problem
i am using crystal of 12MHZ and using the max232 chip (notmax3232) where i pulled up the rx line by 10k

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cat53
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« Reply #1 on: July 31, 2009, 02:48:01 02:48 »

Could you send the complete input/output ?

Did you receive string "Synchronized<CR><LF>" literally ?  I didn't see any where in User manual of LPC21xx (ISP) section mentions of "Synchronized" string or any return code equivalent.
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riteshjain_82
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« Reply #2 on: July 31, 2009, 12:36:22 12:36 »

Yes
this is done by the bootloder inside the arm
now my problem was also solved it is fault os max232 chip
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