STM32F429DISO connection failed

[der-kyle]

Posted on January 26, 2015 at 21:27

Hello,

I hope you can help me. A long time I flashed and debugged my STM32F429DISC. And then the connection failed, the IDE (coocox) said, I should to check the cable connection. I tried to use an other program CoFlash to flash the STM32F4, but it fail, too. I assumed, I have the same error like in this tread: https://my.st.com/public/STe2ecommunities/mcu/Lists/STM32Discovery/Flat.aspx?RootFolder=https%3a%2f%2fmy.st.com%2fpublic%2fSTe2ecommunities%2fmcu%2fLists%2fSTM32Discovery%2fproblem%20in%20downloading%20program%20inflash&FolderCTID=0x01200200770978C69A1141439FE559EB459D75800084C20D8867EAD444A5987D47B... It becomes recommend to do this: 1.) Disconnect your board from usb or other voltage supply. 2.) Connect the BOOT0 Pin with High (3V). 3.) Plugin power/usb cable again. 4.) Start the Flash Loader Demonstrator software, doing a Flash Mass Erase. 5.) Disconnect the usb again. 6.) Disconnect the BOOT0 from High (3V). 7.) Plugin the USB, and check if the board works normal again. 8.) Investigate the code you flashed last time, as it is presumably the source of your trouble. In point 2.) I have the BOOT1 Pin connect with GND and BOOT0 with 3V. And Im at point 4.), but it dont works. In the pictures, you can see the problems. It can not erase. The only thing, I can do is to remove the write protection. I would like to ask you for help. Best regards, Dirk #stm32f4-connection-fail

[Tesla DeLorean]

Posted on January 26, 2015 at 21:31

I don't see a picture..

If you read the thread why wouldn't you be using ST-LINK Utilities?

[der-kyle]

Posted on January 26, 2015 at 21:44

Hello,

Sorry, I have some problems with the upload. I have problems with the ST Link , because the connection is fail. That is the reason, I tried to erase the flash, with the help of UART PA9/PA10 with the Flash  Loader Demonstrator. Best regards, Dirk

[Tesla DeLorean]

Posted on January 27, 2015 at 06:18

If BOOT0 is strapped high the ST-LINK utilities really should be able to gain access to the part. That it cannot suggest other issues. Check the SWD jumpers. Check the ''Connect under reset'' options, and check that SWD and not JTAG is used.

[der-kyle]

Posted on January 27, 2015 at 20:36

Hello,

thank you for your answer. Now, it works. I have tried different baud rates and 115200 was right. Best regards, Dirk