NVIC_SystemReset(); works with STM32F103C but not with STM32F103R

[zlomennypez]

I tried the same code on both microcontrollers, but STM32F103RET6 freezes with NVIC_SystemReset(); Can you help me please?

[waclawek.jan]

What hardware? How is NRST connected? How is BOOT0 connected?

JW

[Tesla DeLorean]

If this, then BOOT pins via a 2x3 jumper/header block

https://community.st.com/s/question/0D53W00001vbbFNSAY/upload-works-well-code-isnt-running-on-custom-stm32f103

[Tesla DeLorean]

Reset can fail on these MCU's if the pin is driven HIGH externally.

It is both an input and output pin, and clamped to ground open-drain style but the NVIC_SystemReset() or the POR triggering on the VDDA threshold level.

External reset circuits are expected to clamp to ground to reset, but otherwise let it float, and have the on pin pull-up get it to the high state.

Make sure BOOT0 and BOOT1 aren't floating, these can cause other code to start, especially in circuits where the power supply has a slow rise time.

[zlomennypez]

This is connection of reset pin. As I said, everything works perfectly, the only thing is software reset with NVIC_SystemReset();

[Peter BENSCH]

You definitely have a mistake in the RESET drawing, because when you press the reset button, it makes a fat short circuit between 3.3V and GND. Or do you really have Reset permanently connected to 3.3V?

[Tesla DeLorean]

The previous iteration/schematic had a pull-up

[zlomennypez]

I have tried take off jumpers, but it didnt help.

[zlomennypez]

Thank you Peter for your answer. Boot pins are connected to jumpers like on bluepill board, to change logic 0 and 1. I will test it, where i s aproblem with booting.