STM32F103C8T6 Unable to burn again

[tyw]

"I recently bought an STM32F030C8T6 chip, but when I was programming it, I didn't enable the debug interface as Serial Wire. As a result, although the first programming was successful, I can no longer program it through the Serial Wire interface. How can I solve this problem?"

[Karl Yamashita]

what are you using, STM32Cube Programmer? What does it report?

I assume this is a custom PCB? I assume VREF is connected since you got JTAG to work, but is it the same programming cable for SWD?

Schematic would help.

[tyw]

The PCB written is the STM32F103C8T6 minimum system development board
I'm using vscode to burn STM32F103C8T6 through ST link. Debugging console prompt:
For help, type "help".
Type "apropos word" to search for commands related to "word".
Add symbol file "D:/desktop/test/test/build/Debug/test. elf"
Add symbol table from file "D:/desktop/test/test/build/Debug/test. elf"
(y or n) [answered Y; input not from terminal]
Reading symbols from D:/desktop/test/test/build/Debug/test. elf
Failed to decode cstring 'could not connect (error 138): {}

[tyw]

I'm using vscode to burn STM32F103C8T6 through ST link. Debugging console prompt:
For help, type "help".
Type "apropos word" to search for commands related to "word".
Add symbol file "D:/desktop/test/test/build/Debug/test. elf"
Add symbol table from file "D:/desktop/test/test/build/Debug/test. elf"
(y or n) [answered Y; input not from terminal]
Reading symbols from D:/desktop/test/test/build/Debug/test. elf
Failed to decode cstring 'could not connect (error 138): {}

[Karl Yamashita]

What OS are you using? How are you programming? Run & debug button? What is in your launch.json file?

[MM..1]

F103 or F030 ??? But simply SWD require NRST line for this and under reset config ….

[tyw]

I don't understand. Could you explain it in detail? Thank you!

[MM..1]

Your board is simple and lack this feature . Normal pinout is https://community.platformio.org/uploads/default/original/2X/c/ceaddead685e6219f5c5d5c8eb57979991978816.png

Use button RESET manualy in right moment and maybe you flash code, but plan next code dont use pins SWD and not use STOP or STANDBY low power mode.

[tyw]

The PCB written is the STM32F103C8T6 minimum system development board

[Andrew Neil]

The PCB written is the STM32F103C8T6 minimum system development board

The is no such things as “the STM32F103C8T6 minimum system development board” - that does not uniquely or unambiguously identify any particular board.

Many vendors have things  they call a “minimum development board”.

You need to give the specific manufacturer and part number - preferably post a link to what you bought.

Some good, clear photos of your setup would help.

 

But what you describe sounds like a so-called “Blue (or black) Pill” - this is not an ST product, and most likely contains a fake /clone STM32 chip.

 

Also what SWD programmer are you using? If it says “ST-Link”, is it genuine?

 

See also: