Arduino for STM32

I have almost the same problem. I wrote an interrupt program based on stm32 F103C8T6. As a button, PB4 cannot be used, but PA2 has no problem. I thought this was because the JTAG function included PB4 as the Rst Pin. API "pinF1_DisconnectDebug(PB_4); // disable Serial wire JTAG configuration&qu...