【OKdo E1双核Cortex M33开发板】基于OKdo E1开发板的RTC电子时钟

jinglixixi · 发表于 2020-11-25 00:12:59

本帖最后由 jinglixixi 于 2020-12-10 11:42 编辑

在LPC55S69的内核中配置了RTC计时器，并在函数库中也提供了相应的函数支持。为此，我们只需要调用相关的函数并为它配置一个显示屏就可实现RTC电子时钟的功能。

实现图示效果的主程序为：

int main(void)
{
uint32_t sec,i;
uint32_t currSeconds;
uint8_t index;
rtc_datetime_t date;
/* Board pin, clock, debug console init */
/* attach 12 MHz clock to FLEXCOMM0 (debug console) */
CLOCK_AttachClk(BOARD_DEBUG_UART_CLK_ATTACH);
/* Enable the RTC 32K Oscillator */
// SYSCON->RTCOSCCTRL |= SYSCON_RTCOSCCTRL_EN_MASK;
BOARD_InitPins();
BOARD_BootClockFROHF96M();
BOARD_InitDebugConsole();
/* Init RTC */
RTC_Init(RTC);
app_oled_init();
OLED_Init();
OLED_Clear();
OLED_ShowString(0,0,"OKDOE1 TEST",16);
OLED_ShowString(0,2,"RTC & OLED",16);
OLED_ShowString(0,5," : :",16);
/* Set a start date time and start RT */
date.year = 2020U;
date.month = 11U;
date.day = 11U;
date.hour = 19U;
date.minute = 0;
date.second = 0;
/* RTC time counter has to be stopped before setting the date & time in the TSR register */
RTC_StopTimer(RTC);
/* Set RTC time to default */
RTC_SetDatetime(RTC, &date);
/* Enable RTC alarm interrupt */
RTC_EnableInterrupts(RTC, kRTC_AlarmInterruptEnable);
/* Enable at the NVIC */
EnableIRQ(RTC_IRQn);
/* Start the RTC time counter */
RTC_StartTimer(RTC);
/* This loop will set the RTC alarm */
while (1)
{
busyWait = true;
index = 0;
sec = 0;
/* Get date time */
RTC_GetDatetime(RTC, &date);
OLED_ShowNum(0,5,date.hour,2,16);
OLED_ShowNum(24,5,date.minute,2,16);
OLED_ShowNum(48,5,date.second,2,16);
for(i=0;i<10000;i++);
}
}