S3C2440 裸机时钟RTC (二)
>month = rBCDMON;
p_date->day = rBCDDATE;
p_date->week_day = rBCDDAY; //读取日期时间
p_date->hour = rBCDHOUR;
p_date->minute = rBCDMIN;
p_date->second = rBCDSEC;
rRTCCON=0x00; //RTC读写禁止，BCD时钟、计数器、无复位
}
/********************************
*
* TICK中断初始化
*
*********************************/
void RTC_tickIRQ_Init(U8 tick)
{
ClearPending(BIT_TICK); //清除标志位
EnableIrq(BIT_TICK); //使能中断源
pISR_TICK=(unsigned)RTC_tickHandler; //中断函数入口地址
rRTCCON=0x00;
rTICNT=(tick&0x7f)|0x80; //使能中断
}
/********************************
*
* 设置闹钟日期、 时间及其闹钟唤醒模式
*
*********************************/
void RTC_alarm_setdate(date *p_date,U8 mode)
{
rRTCCON = 0x01;
rALMYEAR = p_date->year;
rALMMON = p_date->month;
rALMDATE = p_date->day;
rALMHOUR = p_date->hour;
rALMMIN = p_date->minute;
rALMSEC = p_date->second;
rRTCALM = mode; //RTC闹钟控制寄存器
rRTCCON = 0x00;
ClearPending(BIT_RTC); //清除标志位
EnableIrq(BIT_RTC); //open RTC alarm INTERRUPT
pISR_RTC = (unsigned)RTC_alarmHandler;
}
void Main(void)
{
SelectFclk(2); //设置系统时钟 400M
ChangeClockDivider(2, 1); //设置分频 1：4：8
CalcBusClk(); //计算总线频率
rGPHCON &=~((3<<4)|(3<<6));
rGPHCON |=(2<<4)|(2<<6); //GPH2--TXD[0];GPH3--RXD[0]
rGPHUP=0x00; //使能上拉功能
Uart_Init(0,115200);
Uart_Select(0);
rGPBCON &=~((3<<10)|(3<<12)|(3<<14)|(3<<16)); //对GPBCON[10:17]清零
rGPBCON |=((1<<10)|(1<<12)|(1<<14)|(1<<16)); //设置GPB5~8为输出
rGPBUP &=~((1<<5)|(1<<6)|(1<<7)|(1<<8)); //设置GPB5~8的上拉功能
rGPBDAT |=(1<<5)|(1<<6)|(1<<7)|(1<<8); //关闭LED
Beep_Stop(); //蜂鸣器停止发声，蜂鸣器用作闹钟声
C_date.year = 0x12;
C_date.month = 0x05;
C_date.day = 0x09;
C_date.week_day = 0x03; //设置当前日期时间
C_date.hour = 0x12;
C_date.minute = 0x00;
C_date.second = 0x10;
RTC_setdate(&C_date);
C_date.second=0x20;
RTC_alarm_setdate(&C_date,0x41);//0x41表示使能RTC闹钟，以及使能秒时钟闹钟
RTC_tickIRQ_Init(127); // 设置1秒钟tick一次
Uart_Printf("\n ---实时时钟测试程序---\n");
while(Uart_GetKey()!= ESC_KEY)
{
LED1_OFF;
RTC_getdate(&C_date);
if(alarmflag)
{
alarmflag=0;
Uart_Printf("\nRTC ALARM %02x:%02x:%02x \n",C_date.hour,C_date.minute,C_date.second);
Beep_Freq_Set(1000);
delay(5);
Beep_Stop();
}
}
}
/********************************
*
* TICK中断
*
*********************************/
void __irq RTC_tickHandler(void)
{
ClearPending(BIT_TICK);
LED1_ON; //刷新LED1
Delay(500);
RTC_getdate(&C_date);
Uart_Printf("RTC TIME: %04x-%02x-%02x %s %02x:%02x:%02x\n", C_date.year,C_date.month,C_date.day,week_num[C_date.week_day], C_date.hour, C_date.minute, C_date.second );
}
/********************************
*
* TICK中断
*
*********************************/
void __irq RTC_alarmHandler(void)
{
alarmflag = 1;
ClearPending(BIT_RTC);
}