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基于正点原子的RTC
实验效果 LCD屏幕显示年月日时分秒设置任意时间到时间蜂鸣器启动直接 上代码 函数 简单说 就是初始化各个部件 然后让LED1 闪烁来提示系统的正常运行 显示屏显示实时时间 #include "led.h" #include "delay.h" #include "key.h" #include "sys.h" #include "lcd.h" #include "usart.h" #include "usmart.h" #include "rtc.h" #include "oled.h" #include "beep.h" int main(void) { u8 t=0; delay_init(); NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); uart_init(115200); // LED_Init(); // LCD_Init(); OLED_Init(); // OLED_Clear(); usmart_dev.init(SystemCoreClock/1000000); // BEEP_Init(); RTC_Init(); // POINT_COLOR=RED;// LCD_ShowString(60,50,200,16,16,"Elite STM32"); LCD_ShowString(60,70,200,16,16,"RTC TEST"); LCD_ShowString(60,90,200,16,16,"ATOM@ALIENTEK"); LCD_ShowString(60,110,200,16,16,"2015/1/14"); //ÏÔʾʱ¼ä POINT_COLOR=BLUE;// LCD_ShowString(60,130,200,16,16," - - "); LCD_ShowString(60,162,200,16,16," : : "); while(1) { if(t!=calendar.sec) { t=calendar.sec; //LCD_ShowNum(60,130,calendar.w_year,4,16); OLED_ShowNum(0,2,calendar.w_year,4,16); //LCD_ShowNum(100,130,calendar.w_month,2,16); OLED_ShowNum(0,4,calendar.w_month,2,16); //LCD_ShowNum(124,130,calendar.w_date,2,16); OLED_ShowNum(0,6,calendar.w_date,2,16); switch(calendar.week) { case 0: LCD_ShowString(60,148,200,16,16,"Sunday "); break; case 1: LCD_ShowString(60,148,200,16,16,"Monday "); break; case 2: LCD_ShowString(60,148,200,16,16,"Tuesday "); break; case 3: LCD_ShowString(60,148,200,16,16,"Wednesday"); break; case 4: LCD_ShowString(60,148,200,16,16,"Thursday "); break; case 5: LCD_ShowString(60,148,200,16,16,"Friday "); break; case 6: LCD_ShowString(60,148,200,16,16,"Saturday "); break; } LCD_ShowNum(60,162,calendar.hour,2,16); LCD_ShowNum(84,162,calendar.min,2,16); LCD_ShowNum(108,162,calendar.sec,2,16); LED0=!LED0; } delay_ms(10); }; } RTC配置函数 这里说明一下 我的代码是可以直接复制替换的 说下基于原子我修改了哪些 使能了时钟和闹钟中断 之前只使能了时钟(RTC_ITConfig(RTC_IT_SEC|RTC_IT_ALR, ENABLE);) 调用了设置闹钟值的函数(RTC_Alarm_Set(2021,1,13,16,39,59);) 在闹钟中断的函数中 增加了蜂鸣器 启动 BEEP=1; #include "sys.h" #include "delay.h" #include "usart.h" #include "rtc.h" #include "led.h" #include "beep.h" _calendar_obj calendar; static void RTC_NVIC_Config(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } u8 RTC_Init(void) { u8 temp=0; RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); PWR_BackupAccessCmd(ENABLE); if (BKP_ReadBackupRegister(BKP_DR1) != 0x5051) { BKP_DeInit(); RCC_LSEConfig(RCC_LSE_ON); while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET&&temp<250) { temp++; delay_ms(10); } if(temp>=250)return 1; RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); RCC_RTCCLKCmd(ENABLE); RTC_WaitForLastTask(); RTC_WaitForSynchro(); RTC_ITConfig(RTC_IT_SEC|RTC_IT_ALR, ENABLE); RTC_WaitForLastTask(); RTC_EnterConfigMode(); RTC_SetPrescaler(32767); RTC_WaitForLastTask(); RTC_Set(2021,1,13,16,38,59); RTC_Alarm_Set(2021,1,13,16,39,59); RTC_ExitConfigMode(); BKP_WriteBackupRegister(BKP_DR1, 0X5051); } else//ϵͳ¼ÌÐø¼Æʱ { RTC_WaitForSynchro(); RTC_ITConfig(RTC_IT_SEC, ENABLE); RTC_WaitForLastTask(); } RTC_NVIC_Config(); RTC_Get(); return 0; } void RTC_IRQHandler(void) { if (RTC_GetITStatus(RTC_IT_SEC) != RESET) { RTC_Get(); } if(RTC_GetITStatus(RTC_IT_ALR)!= RESET) { RTC_ClearITPendingBit(RTC_IT_ALR); RTC_Get(); printf("Alarm Time:%d-%d-%d %d:%d:%dn",calendar.w_year,calendar.w_month,calendar.w_date,calendar.hour,calendar.min,calendar.sec); BEEP=1; } RTC_ClearITPendingBit(RTC_IT_SEC|RTC_IT_OW); RTC_WaitForLastTask(); } u8 Is_Leap_Year(u16 year) { if(year%4==0) // { if(year%100==0) { if(year%400==0)return 1; else return 0; }else return 1; }else return 0; } u8 const table_week[12]={0,3,3,6,1,4,6,2,5,0,3,5}; const u8 mon_table[12]={31,28,31,30,31,30,31,31,30,31,30,31}; u8 RTC_Set(u16 syear,u8 smon,u8 sday,u8 hour,u8 min,u8 sec) { u16 t; u32 seccount=0; if(syear<1970||syear>2099)return 1; for(t=1970;t if(Is_Leap_Year(t))seccount+=31622400; else seccount+=31536000; } smon-=1; for(t=0;t seccount+=(u32)mon_table[t]*86400; if(Is_Leap_Year(syear)&&t==1)seccount+=86400; } seccount+=(u32)(sday-1)*86400; seccount+=(u32)hour*3600; seccount+=(u32)min*60; seccount+=sec; RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); PWR_BackupAccessCmd(ENABLE); // RTC_SetCounter(seccount); // RTC_WaitForLastTask(); // return 0; } u8 RTC_Alarm_Set(u16 syear,u8 smon,u8 sday,u8 hour,u8 min,u8 sec) { u16 t; u32 seccount=0; if(syear<1970||syear>2099)return 1; for(t=1970;t if(Is_Leap_Year(t))seccount+=31622400; else seccount+=31536000; } smon-=1; for(t=0;t seccount+=(u32)mon_table[t]*86400; if(Is_Leap_Year(syear)&&t==1)seccount+=86400; } seccount+=(u32)(sday-1)*86400; seccount+=(u32)hour*3600; seccount+=(u32)min*60; seccount+=sec; //ÉèÖÃʱÖÓ RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); PWR_BackupAccessCmd(ENABLE); RTC_SetAlarm(seccount); RTC_WaitForLastTask(); return 0; } u8 RTC_Get(void) { static u16 daycnt=0; u32 timecount=0; u32 temp=0; u16 temp1=0; timecount=RTC_GetCounter(); temp=timecount/86400; if(daycnt!=temp) { daycnt=temp; temp1=1970; while(temp>=365) { if(Is_Leap_Year(temp1)) { if(temp>=366)temp-=366; else {temp1++;break;} } else temp-=365; //ƽÄê temp1++; } calendar.w_year=temp1; temp1=0; while(temp>=28) { if(Is_Leap_Year(calendar.w_year)&&temp1==1) { if(temp>=29)temp-=29; else break; } else { if(temp>=mon_table[temp1])temp-=mon_table[temp1]; else break; } temp1++; } calendar.w_month=temp1+1; calendar.w_date=temp+1; } temp=timecount%86400; calendar.hour=temp/3600; calendar.min=(temp%3600)/60; calendar.sec=(temp%3600)%60; calendar.week=RTC_Get_Week(calendar.w_year,calendar.w_month,calendar.w_date); return 0; } u8 RTC_Get_Week(u16 year,u8 month,u8 day) { u16 temp2; u8 yearH,yearL; yearH=year/100; yearL=year%100; if (yearH>19)yearL+=100; temp2=yearL+yearL/4; temp2=temp2%7; temp2=temp2+day+table_week[month-1]; if (yearL%4==0&&month<3)temp2--; return(temp2%7); } 小贴士: RTC 具有写保护功能每次操作都要修改掉 if (BKP_ReadBackupRegister(BKP_DR1) != 0x5051) BKP_WriteBackupRegister(BKP_DR1, 0X5051); 所有行代码的值最就是5051和5050m 如果程序报错很可能是以下 没有添加蜂鸣器源文件和头文件 主函数没有初始化蜂鸣器 |
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