rcc_clock_setup_in_hse_8mhz_out_72mhz();// use 8 MHz high speed external clock to generate 72 MHz internal clock
#if DEBUG
// enable functionalities for easier debug
DBGMCU_CR|=DBGMCU_CR_IWDG_STOP;// stop independent watchdog counter when code is halted
DBGMCU_CR|=DBGMCU_CR_WWDG_STOP;// stop window watchdog counter when code is halted
DBGMCU_CR|=DBGMCU_CR_STANDBY;// allow debug also in standby mode (keep digital part and clock powered)
DBGMCU_CR|=DBGMCU_CR_STOP;// allow debug also in stop mode (keep clock powered)
DBGMCU_CR|=DBGMCU_CR_SLEEP;// allow debug also in sleep mode (keep clock powered)
#else if !(DEBUG)
// setup watchdog to reset in case we get stuck (i.e. when an error occurred)
iwdg_set_period_ms(WATCHDOG_PERIOD);// set independent watchdog period
iwdg_start();// start independent watchdog
#endif
// setup board
@ -165,6 +171,18 @@ void main(void)
// minimal setup ready
printf("welcome to the STM32F1 CuVoodoo example code\n");// print welcome message
#if !(DEBUG)
// show watchdog information
printf("watchdog set to (%.2fs)\n",WATCHDOG_PERIOD/1000.0);
if(FLASH_OBR&FLASH_OBR_OPTERR){
printf("option bytes not set in flash: software wachtdog used (not started at reset)\n");
}elseif(FLASH_OBR&FLASH_OBR_WDG_SW){
printf("software wachtdog used (not started at reset)\n");
}else{
printf("hardware wachtdog used (started at reset)\n");
}
#endif
// setup RTC
printf("setup internal RTC: ");
rtc_auto_awake(RCC_LSE,32768-1);// ensure internal RTC is on, uses the 32.678 kHz LSE, and the prescale is set to our tick speed, else update backup registers accordingly (power off the micro-controller for the change to take effect)
