嵌入式系统原理及应用教程第5剖析.ppt

5.5.4 定时部件应用实例 //RTC时钟显示 void Display_Rtc(void) { int year,tmp,key; int month,date,weekday,hour,min,sec; Uart_Printf([ Display RTC Test ]\n); Uart_Printf(0. RTC Initialize 1. RTC Time Setting 2. Only RTC Display\n\n); Uart_Printf(Selet : ); key = Uart_GetIntNum(); Uart_Printf(\n\n); isInit = key; if(isInit == 0) { Rtc_Init(); isInit = 2; } 5.5.4 定时部件应用实例 else if(isInit == 1) { Rtc_TimeSet(); isInit = 2; } rRTCCON = 0x01; Uart_Printf(Press any key to exit.\n\n); while(!Uart_GetKey()) { while(1) { if(rBCDYEAR == 0x99) year = 0x1999; else year = 0x2000 + rBCDYEAR; month = rBCDMON; weekday = rBCDDAY; date = rBCDDATE; hour = rBCDHOUR; 5.5.4 定时部件应用实例 min = rBCDMIN; sec = rBCDSEC; if(sec!=tmp) { tmp = sec; break; } } Uart_Printf(%2x : %2x : %2x %10s, %2x/%2x/%4x\n,hour,min,sec,day[weekday],month,date,year); } rRTCCON = 0x0; //No reset, Merge BCD counters, 1/32768, RTC Control disable(for power consumption) } //RTC定时器报警测试 void Test_Rtc_Alarm(void) { Uart_Printf([ RTC Alarm Test for S3C2440 ]\n); Rtc_Init(); 5.5.4 定时部件应用实例 rRTCCON = 0x01; //无复位, 合并ＢＣＤ计数器, 1/32768, RTC控制使能 rALMYEAR = TESTYEAR2 ; rALMMON = TESTMONTH2; rALMDATE = TESTDATE2 ; rALMHOUR = TESTHOUR2 ; rALMMIN = TESTMIN2 ; rALMSEC = TESTSEC2 + 9; Uart_Printf(After 9 sec, alarm interrupt will occur.. \n); isRtcInt = 0; pISR_RTC = (unsigned int)Rtc_Int; rRTCALM = 0x7f; //全局变量,Year,Month,Day,Hour,Minute,Second 报警使能 rRTCCON = 0x0;