STM32 L1 Discovery - Failed to read CPUID for Cortex device

ecatala · ‎2014-06-12

Posted on June 12, 2014 at 14:12

Hi,

I am using the IDE from EWARM IAR Embedded Workbench for ARM 6.40.2

and a ST-LINK to download the demo project to the evaluation board STM32L152RCT6 and I get the error Failed to read CPUID for Cortex device

Best regards,

Estanislao

Tesla DeLorean · ‎2014-06-12

Posted on June 12, 2014 at 15:43

Perhaps it is entering a low power mode and losing debug connectivity? You could reset with BOOT0 pulled/set high, this would get you into the System Loader and permit recovery of the board.

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