ADSP-BF533的例程源码21：RTC实时时钟

/******************************************************** * * 北京四维卓信电子有限公司 * http://www.openadsp.com * * 【OpenADSP开源社区】 * http://www.openadsp.com/bbs/ * ********************************************************/ #include <cdefBF533.h> void Set_PLL(unsigned int pmsel,unsigned int pssel) { unsigned int new_PLL_CTL; *pPLL_DIV = pssel; asm("ssync;"); new_PLL_CTL = (pmsel & 0x3f) << 9; *pSIC_IWR |= 0xffffffff; if (new_PLL_CTL != *pPLL_CTL) { *pPLL_CTL = new_PLL_CTL; asm("ssync;"); asm("idle;"); } } void Init_EBIU(void) { *pEBIU_AMBCTL0 = 0x7bb07bb0; *pEBIU_AMBCTL1 = 0xffc07bb0; *pEBIU_AMGCTL = 0x000f; } void main(void) { int time_flag=0; int day = 0; int hours = 12; int min = 15; int sec = 30; unsigned long times; Set_PLL(16,4); Init_EBIU(); *pRTC_PREN = 1; *pRTC_ISTAT = 0; *pRTC_ICTL = 0; *pRTC_STAT = (day<<17)|(hours<<12)|(min<<6)|(sec); while(1) { times = *pRTC_STAT; day = (times>>17)&0x7fff; hours = (times>>12)&0x1f; min = (times>>6)&0x3f; sec = times &0x3f; if(time_flag != sec) { time_flag = sec; printf("time is %d day %d:%d:%d\n",day,hours,min,sec); } } }