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About STM8S003 be reset continoustly

qloi
Associate

Hello everyone, I have got a problem but I can't resolve it.

I made a project read NMEA string from UART and show it to OLED 128x64 (I2C interface) with STM8s003F3P6. everything is OK when I tried to get GPS strings from UART and store them variable , with OLED also ok and I can show everything on it . But when I combine 2 libs(GPS parsing and OLED disp) I got very strange thing!. After power on, the circuit show all GPS data I need , it run few seconds and auto reset STM chip, all is restart and repeated same way?

I can't find where error, maybe stack overflow?

the code flow follow:

UART_ISR()
 
{
  newdata = get_GPS_data(); //get NMEA string , when get all, newdata = 1
}
 
 
 
main()
{
  while(1)
  {
      if(newdata)
     {
        newdata = 0;
        pro = GPS_parse();  //parsing GPS data and storge into variable
        If(pro)    //handled afer 2 sec (the UART received NMEA 2s period)
        {
            //pro = 0;
            _disable_interrupt();
            OLED_show();   //show data on OLED
            _enable_interrupt();
        }
  }
}

please help!

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