【RA4L1-SENSOR】RTC实时时钟

在使用SLCDC配置好段码LCD屏之后，则么能不用来显示个时间呢
下面展示下配置RTC的流程


时钟源要选择外部低俗时钟，就是图中的Sub-clock
Frequency Comparision Value(LOCO):时钟源分频，外部低速晶振是32.768khz,故这里分频选择256-1，即32768/256 = 128Hz
Automatic Adjustment Mode：自动校准模式，用于校正Sub-Clock震荡过快或过慢引起的误差，这里选择使能
Automatic Adjustment Period：自动校正的时间，这里选择10秒
Callback：中断回调函数，还配置了闹钟中断和周期型中断优先级

RTC时间结构体，用于配置时间或者读取时间

实验代码，使用串口发送时间，并在段码LCD屏上显示

rtc_time_t time_set =
{
	.tm_year = 2025 - 1900, //年份要减去1900
	.tm_mday = 13,
	.tm_wday = 5,
	.tm_mon = 6 - 1, //0-11表示1-12月，所以要减去1
	.tm_hour = 11,
	.tm_min = 48,
	.tm_sec = 0,
	
};

rtc_time_t time_get;

void hal_entry(void)
{
	fsp_err_t err;
	err = SysTick_Init();
    assert(FSP_SUCCESS == err);
	
	err = g_slcdc0.p_api->open(g_slcdc0.p_ctrl,g_slcdc0.p_cfg);
    assert(FSP_SUCCESS == err);
	
	R_BSP_SoftwareDelay(5, BSP_DELAY_UNITS_MILLISECONDS);
	
	err = g_slcdc0.p_api->start(g_slcdc0.p_ctrl);
    assert(FSP_SUCCESS == err);
	
	err = g_uart9.p_api->open(&g_uart9_ctrl, &g_uart9_cfg);
    assert(FSP_SUCCESS == err);

	err = g_rtc0.p_api->open(g_rtc0.p_ctrl,g_rtc0.p_cfg);
    assert(FSP_SUCCESS == err);
	
	err = g_rtc0.p_api->calendarTimeSet(g_rtc0.p_ctrl,&time_set);
    assert(FSP_SUCCESS == err);

	err = g_rtc0.p_api->periodicIrqRateSet(g_rtc0.p_ctrl,RTC_PERIODIC_IRQ_SELECT_1_SECOND);
    assert(FSP_SUCCESS == err);
	while(1)
	{
//		printf("1");
//		SysTick_Delay_ms(500);
	}
#if BSP_TZ_SECURE_BUILD
    /* Enter non-secure code */
    R_BSP_NonSecureEnter();
#endif
}


void rtc_callback(rtc_callback_args_t *p_args)
{
	if(p_args->event == RTC_EVENT_PERIODIC_IRQ)
	{
		g_rtc0.p_api->calendarTimeGet(g_rtc0.p_ctrl,&time_get);
		printf ("%d年%d月%d日%d:%d:%d\r\n", time_get.tm_year + 1900, 
			time_get.tm_mon + 1, time_get.tm_mday,
			time_get.tm_hour, time_get.tm_min, time_get.tm_sec);
		LCD_ShowTime(&time_get);
	}
}

LCD显示时间代码

void LCD_ShowTime(rtc_time_t * const p_time)
{
	LCD_ShowSingleNum(1,(uint8_t)p_time->tm_hour/10,0);
	LCD_ShowSingleNum(2,(uint8_t)p_time->tm_hour%10,1);
	LCD_ShowSingleNum(3,(uint8_t)p_time->tm_min/10,0);
	LCD_ShowSingleNum(4,(uint8_t)p_time->tm_min%10,1);
	LCD_ShowSingleNum(5,(uint8_t)p_time->tm_sec/10,0);
	LCD_ShowSingleNum(6,(uint8_t)p_time->tm_sec%10,0);
	
}