STM32L431VCT6 Reset does not work on basic project created by STM32CubeMx

[mich35]

Hello,

I am using a sTM32L430 with a JTAG access through ST LINK V2 and STM32CubeIDE.

This project was created with STM32CubeMx and mainly contains a while(1) loop toggling a led.

After a power the program starts correctly (led toggles and current consumption is around 2mA)

After a reset the program does not start and the current consumption is around 16mA.

I checked the reset signal state with an oscilloscope and the waveform is correct.

Do you have any idea?

Best regards

Mich

[Bob S]

Starting a program from the IDE "run" button is different than by hardware reset or power-on.  The IDE will force the PC to the "Reset_Handler" address in the elf file (comes from the startup_stm32Lxxxxxx.s file) - ignoring the PC value in the vector table.  I don't recall off hand what it does with the stack pointer.  Hardware reset or power-on will use the vector table entries for SP and PC.

So you may have some issues with the vector table.  See if you have USER_VECT_TAB_ADDRESS defined to non-zero in system_stm32l4xx.c.

Other than that, use the debugger to set breakpoints in main() and in the assembly startup code then press the reset button and see what the code does.

[mich35]

It seems that it is an hardware issue with this hand soldered prototype.

I soldered a 2nd PCBA and there is not such issue.