S3C2440裸机开发RTC配置

#include "S3C2440.h" #include "led.h" #include "uart.h" //RTC滴答中断处理函数 void __irq RTC_Tick_Handler(void) { unsigned char date[12] = "2000-00-00 "; unsigned char time[9] = "00:00:00"; //清除滴答中断位 SRCPND = (1<<8); INTPND = (1<<8); RTCCON = 1;//RTC读写使能，BCD时钟、计数器、无复位 //读取年 if(BCDYEAR > 15) { date[2] = '0' + ((BCDYEAR & 0xf0) >> 4); date[3] = '0' + (BCDYEAR & 0x0f); } else { if(BCDYEAR >= 10) { date[2] = '1'; date[3] = '0' + (BCDYEAR - 10); } else { date[2] = '0'; date[3] = '0' + (BCDYEAR & 0x0f); } } //读取月 date[5] = '0' + ((BCDMON & 0x10) >> 4); date[6] = '0' + (BCDMON & 0x0f); //读取日 date[8] = '0' + ((BCDDATE & 0x30) >> 4); date[9] = '0' + (BCDDATE & 0x0f); //读取时 time[0] = '0' + ((BCDHOUR & 0x30) >> 4); time[1] = '0' + (BCDHOUR & 0x0f); //读取分 time[3] = '0' + ((BCDMIN & 0x70) >> 4); time[4] = '0' + (BCDMIN & 0x0f); //读取秒 time[6] = '0' + ((BCDSEC & 0x70) >> 4); time[7] = '0' + (BCDSEC & 0x0f); RTCCON = 0;//RTC读写禁止，BCD时钟、计数器、无复位 //串口发送日期 UART0_puts(date); UART0_puts(time); } //RTC闹钟中断处理函数 void __irq RTC_Alarm_Handler(void) { //清除中断位 SRCPND = (1<<30); INTPND = (1<<30); //串口发送 UART0_puts("闹钟响了！"); } //R设置RTC时间2022年12月12日01:40:00，星期一 void RTC_Set_Time(void) { RTCCON = 1;//RTC读写使能，BCD时钟、计数器、无复位 BCDYEAR = 0x22; BCDMON = 0x12; BCDDATE = 0x12; BCDDAY = 0X1; //设置时间 BCDHOUR = 0X1; BCDMIN = 0X40; BCDSEC = 0X00; RTCCON = 0;//RTC读写禁止，BCD时钟、计数器、无复位 } //读取RTC时间 void RTC_Read_Time(void) { unsigned char date[12] = "2000-00-00 "; unsigned char time[9] = "00:00:00"; RTCCON = 1;//RTC读写使能，BCD时钟、计数器、无复位 //读取年 if(BCDYEAR > 15) { date[2] = '0' + ((BCDYEAR & 0xf0) >> 4); date[3] = '0' + (BCDYEAR & 0x0f); } else { if(BCDYEAR >= 10) { date[2] = '1'; date[3] = '0' + (BCDYEAR - 10); } else { date[2] = '0'; date[3] = '0' + (BCDYEAR & 0x0f); } } //读取月 date[5] = '0' + ((BCDMON & 0x10) >> 4); date[6] = '0' + (BCDMON & 0x0f); //读取日 date[8] = '0' + ((BCDDATE & 0x30) >> 4); date[9] = '0' + (BCDDATE & 0x0f); //读取时 time[0] = '0' + ((BCDHOUR & 0x30) >> 4); time[1] = '0' + (BCDHOUR & 0x0f); //读取分 time[3] = '0' + ((BCDMIN & 0x70) >> 4); time[4] = '0' + (BCDMIN & 0x0f); //读取秒 time[6] = '0' + ((BCDSEC & 0x70) >> 4); time[7] = '0' + (BCDSEC & 0x0f); RTCCON = 0;//RTC读写禁止，BCD时钟、计数器、无复位 //串口发送日期 UART0_puts(date); UART0_puts(time); } //RTC滴答设置 void RTC_Tick_Init(void) { //清除滴答中断位 SRCPND = (1<<8); INTPND = (1<<8); INTMSK &= ~(1<<8); //使能滴答中断 pISR_TICK = (unsigned)RTC_Tick_Handler;//中断处理函数 /* 滴答时间周期 = （时间计数+1）/128 = （127+1）/128 = 1s */ TICNT |= ((1<<7) | (0x7f<<0));//使能中断，时间计数设置为127 } //RTC闹钟设置 void RTC_Alarm_Init(void) { RTCCON = 1;//RTC读写使能，BCD时钟、计数器、无复位 ALMSEC = 0;//秒闹钟设置为0，当秒数为0时，触发中断 RTCALM |= ((1<<6) | (1<<0));//使能全局闹钟，使能秒闹钟 RTCCON = 0;//RTC读写禁止，BCD时钟、计数器、无复位 //清除闹钟中断位 SRCPND = (1<<30); INTPND = (1<<30); INTMSK &= ~(1<<30);//使能闹钟中断 pISR_RTC = (unsigned)RTC_Alarm_Handler;//中断处理函数 }