[ST NUCLEO-U575ZI-Q Review] + RTC Electronic Clock

jinglixixi

[ST NUCLEO-U575ZI-Q Review] + RTC Electronic Clock [Copy link]

In the manufacturer's routine, an example of using RTC is provided. By combining it with the serial digital tube module, the effect of an electronic clock can be achieved, as shown in the figure below.

Timing effect

When realizing the electronic clock display effect, the RTC clock display function needs to be modified. The modified content is as follows:

static void RTC_TimeShow(uint8_t *showtime)
{
  RTC_DateTypeDef sdatestructureget;
  RTC_TimeTypeDef stimestructureget;
  HAL_RTC_GetTime(&hrtc, &stimestructureget, RTC_FORMAT_BIN);
  Write_Max7219(8,stimestructureget.Hours/10);
  Write_Max7219(7,stimestructureget.Hours%10);
  Write_Max7219(5,stimestructureget.Minutes/10);
  Write_Max7219(4,stimestructureget.Minutes%10);
  Write_Max7219(2,stimestructureget.Seconds/10);
  Write_Max7219(1,stimestructureget.Seconds%10);
}

It is worth noting that the timing value read by the RTC is presented in hexadecimal form, so the numerical display function needs to be modified to realize the display processing of hexadecimal numbers.

The main program to achieve the display effect above is:

int main(void)
{
  HAL_Init();
  HAL_PWR_EnableBkUpAccess();
  __HAL_RCC_BACKUPRESET_FORCE();
  __HAL_RCC_BACKUPRESET_RELEASE();
  SystemClock_Config();
  SystemPower_Config();
  MX_ICACHE_Init();
  MX_RTC_Init();
  BSP_LED_Init(LED2);
  BSP_LED_Init(LED3);
  RTCStatus = 1;
  
  app_MAX7219();
  Init_MAX7219();
  Write_Max7219(3,10);
  Write_Max7219(6,10);
  while (1)
  {
    RTC_TimeShow(aShowTime);
  }
}

In addition, in order to facilitate time adjustment, you can also add parameter input processing functions to perform time correction!

Video demonstration: https://www.bilibili.com/video/BV1pD4y1h7Yu/?vd_source=f302fc0cc3a0425328db53a3b92082ca

lugl4313820

66666, this one is unique.

jinglixixi

lugl4313820 posted on 2022-12-18 23:24 66666, this is unique.

Thanks for your support!!!

okhxyyo

Review summary: Free application | ST NUCLEO-U575ZI-Q https://en.eeworld.com/bbs/thread-1228653-1-1.html