[GigaDevice GD32F310 Review] +RTC Usage

jinglixixi

[GigaDevice GD32F310 Review] +RTC Usage [Copy link]

In the routine program of the development board, an RTC test program is provided, which displays the output content through the serial port, and can use the serial port to set the RTC initial test value and alarm prompt parameters. The test effect is shown in Figure 1.

Figure 1 Test results

After the program is modified, the timing function can be realized, and the effect is shown in Figure 2.

Figure 2 RTC timing

The modified display function is:

void rtc_show_time(void)
{
 rtc_current_time_get(&rtc_initpara);
 time_subsecond = rtc_subsecond_get();
printf("Current time: %0.2x:%0.2x:%0.2x \r\n", \
 rtc_initpara.rtc_hour, rtc_initpara.rtc_minute, rtc_initpara.rtc_second);
}

The corresponding main program is:

int main(void)
{
 systick_config();
 usart0_gpio_config();
 usart0_config();
 printf("\n\r ****************** RTC calendar alarm demo ******************\n\r");
 rcu_periph_clock_enable(RCU_PMU);
 pmu_backup_write_enable();
 rtc_pre_config();
 if(BKP_VALUE != RTC_BKP0) {
 rtc_setup();
 } else {
 if(RESET != rcu_flag_get(RCU_FLAG_PORRST)) {
 printf("power on reset occurred....\n\r");
 } else if(RESET != rcu_flag_get(RCU_FLAG_EPRST)) {
 printf("external reset occurred....\n\r");
 }
 printf("no need to configure RTC....\n\r");
 rtc_flag_clear(RTC_STAT_ALRM0F);
 exti_flag_clear(EXTI_17);
 rtc_show_time();
 rtc_show_alarm();
 }
 while(1){
 rtc_show_time();
 delay_1ms(1000);
 }
}

When adding an OLED screen display driver, the display effect shown in Figure 3 can be achieved by simply modifying the display program.

The corresponding display function is:

void rtc_show_time(void)
{
 rtc_current_time_get(&rtc_initpara);
 time_subsecond = rtc_subsecond_get();
OLED_ShowNum(20,4,rtc_initpara.rtc_hour/16*10+rtc_initpara.rtc_hour%16,2,16);
OLED_ShowNum(44,4,rtc_initpara.rtc_minute/16*10+rtc_initpara.rtc_minute%16,2,16);
OLED_ShowNum(68,4,rtc_initpara.rtc_second/16*10+rtc_initpara.rtc_second%16,2,16);
}

Figure 3 RTC electronic clock

Combined with the RTC parameter settings introduced above, a complete RTC electronic clock can be constructed.

lugl4313820

RTC clock is very practical. Thanks for sharing. You are a professional evaluation expert.

jinglixixi

lugl4313820 posted on 2022-5-24 06:20 RTC clock, very practical, thank you for sharing, professional evaluation expert.

How dare I, how dare I!

freebsder

Thanks for sharing, looking forward to the follow-up