48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
#include "base.h"
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#include "rtc.h"
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int RTC_InitNormal (RTC_InitStruct *init)
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{
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RTC_InitTypeDef RTC_InitStructure;
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u16 retry=0X1FFF;
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);//使能PWR时钟
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PWR_BackupAccessCmd(ENABLE); //使能后备寄存器访问
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if(RTC_ReadBackupRegister(RTC_BKP_DR0)!=0x5050) //是否第一次配置?
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{
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RCC_LSEConfig(RCC_LSE_ON);//LSE 开启
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while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) //检查指定的RCC标志位设置与否,等待低速晶振就绪
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{
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retry++;
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if (init->delay_ms)
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init->delay_ms(10);
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}
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if(retry==0)return -1; //LSE 开启失败.
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RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); //设置RTC时钟(RTCCLK),选择LSE作为RTC时钟
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RCC_RTCCLKCmd(ENABLE); //使能RTC时钟
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RTC_InitStructure.RTC_AsynchPrediv = 0x7F;//RTC异步分频系数(1~0X7F)
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RTC_InitStructure.RTC_SynchPrediv = 0xFF;//RTC同步分频系数(0~7FFF)
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RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;//RTC设置为,24小时格式
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RTC_Init(&RTC_InitStructure);
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RTC_TimeTypeDef time={0};
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time.RTC_Hours=12;
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time.RTC_H12=RTC_H12_AM;
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RTC_SetTime (RTC_Format_BIN,&time);
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RTC_DateTypeDef data={0};
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data.RTC_Year=19;data.RTC_Month=12;data.RTC_Date=3;data.RTC_WeekDay=1;
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RTC_SetDate(RTC_Format_BIN,&data);
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RTC_WriteBackupRegister(RTC_BKP_DR0,0x5050); //标记已经初始化过了
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}
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return 0;
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}
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