Cant connect to stm32 discovery

shinobi · ‎2011-09-30

Posted on October 01, 2011 at 00:11

I have a problem with stm32 discovery. I am using IAR 6.21.3 and I constantly get the following error:

Fatal error: Faild to read CPUID from Cortex device

Session aborted!

ST-Link Utility is also giving me an error:

No target connected

Everything was running fine up until recently when I changed rcc (rcc_cfgr to be precise) and this error popped up. Since then I can't make any kind of connection with the board.

Please, give me some suggestions as to what could have gone wrong and how to fix it. Thanks in advance!

Tesla DeLorean · ‎2011-09-30

Posted on October 01, 2011 at 05:02

Get BOOT0 High (SB16 Off), and BOOT1 Low (SB2 On - Default), it will then boot into the system loader instead of your application.

Also be sure to use SWD mode.

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shinobi · ‎2011-10-01

Posted on October 01, 2011 at 19:18

It worked! Thank you so much!