unable to program or erase the flash

lakshmikantha85 · ‎2011-10-02

Posted on October 02, 2011 at 15:31

Hi,

I want to use PA13 (multiplexed with JTMS) as GPIO pin of stm32f103. So i configured AFIO_MAPR reg (SWJ_CFG[2:0] - 100 --> JTAG-DP Disabled and SW-DP Disabled) .

Now i am unable to program or erase flash. Please help.

Tesla DeLorean · ‎2011-10-02

Posted on October 02, 2011 at 19:04

Use to BOOTx pins so it runs the system loader, and not your code that disables the JTAG.

In the future consider checking a GPIO pin before disabling the JTAG, or providing a serial console to re-enable it for programming, or sending firmware updates directly.

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Dmitry Novikov · ‎2016-12-21

Posted on December 21, 2016 at 09:22

Hi, I have the same error and found 3 another threads with this. Looks like there is error with writing to AFIO->MAPR register.

https://community.st.com/0D50X00009XkYWnSAN