8 years, 7 months ago.

LED blink program does't work properly on STM32F030R8. Why?

#include "mbed.h"

Serial serial(USBTX, USBRX);
DigitalOut led1(PA_5);

int main() {
    while(1) {
        serial.printf("Freq : %d Hz\r\n",SystemCoreClock);
        led1 = 1;
        wait(2);
        led1 = 0;
        wait(2);
        
    }
}

Board : Nucleo-F030R8

Selected the target board as above. Complied this on mbed.org nice and clean. Got the bin file downloaded and copied on to the Nucleo drive.

All drivers installed on PC and a virtual com port is showing. Opened Hyperterminal and could see nothing on it. LED toggles, but the timing is very long. It take long time to switch on and same with off.

I have another board Nucleo-F091RC, I switch the target board and compile it and transfer the bin file to the target board and it works perfect. Prints the frequency as

Freq : 48000000 Hz

So, I am not sure that the problem is with Nucleo-F030R8. In fact, I tried to create a simple circuit to STM32F030R8 and I programmed it with STLINK with the same code that I used on Nucleo-F030R8, same result there too.

I would appreciate anyone input on this help me overcome this issue.