基于凌阳16位单片机的数字频率计

#include "SPCE061V004.H" void delay(); void dsp(); unsigned int g_Data[10] = {0x003f,0x0006,0x005b,0x004f,0x0066,0x006d,0x007d,0x0007,0x007f,0x006f}; unsigned int iData[5]; int main(void) { unsigned int t,i,j,m; unsigned long int f,k=0; t=0x0000; f=0x0000; *P_IOA_Dir=0xffff; *P_IOA_Attrib=0xffff; *P_IOA_Data=0x0000; *P_IOB_Dir=0xff00; *P_IOB_Attrib=0xff00; *P_IOB_Data=0xff00; *P_INT_Ctrl=C_IRQ1_TMA+C_IRQ2_TMB; //定时器A和B的溢出中断控制字设置; asm("INT OFF"); *P_TimerA_Ctrl=C_SourceA_1+C_SourceB_1024Hz; //TimerA:1024Hz *P_TimerA_Data=0xFDFF; //0.5 Second *P_TimerB_Ctrl=0x0207; //设置定时器B的时钟源为EXT1外部时钟源; *P_TimerB_Data=0x0000; L1: while(1) { *P_Watchdog_Clear = C_WDTCLR; m=0; if(*P_INT_Ctrl&C_IRQ1_TMA) { *P_INT_Clear=C_IRQ1_TMA; //clear INT flag t++; } if(*P_INT_Ctrl&C_IRQ2_TMB) { *P_INT_Clear=C_IRQ2_TMB; k=k+65535; } if(t==2) { *P_TimerB_Ctrl=0x0006; *P_TimerA_Ctrl=0x0006; f=*P_TimerB_Data+k; break; //TimerA定时一秒后,定时器A和B停止计数，跳出测频程序，进入数码管显示; } } i=f/10000; iData[4]=i; j=f%10000; i=j/1000; iData[3]=i; j=j%1000; i=j/100; iData[2]=i; j=j%100; i=j/10; iData[1]=i; j=j%10; iData[0]=j; if(f>99999) //最大显示99999HZ; iData[0]=iData[1]=iData[2]=iData[3]=iData[4]=9; while(1) { dsp(); m++; if(m>1000) goto L1; //显示一段时间后，再次进入测频程序; *P_Watchdog_Clear=0x0001; } } void delay() //延时子程序; { unsigned char j,k; for(j=0;j<2;j++) for(k=0;k<50;k++); } void dsp() //数码管显示子程序; { *P_IOA_Data=g_Data[iData[4]]; *P_IOB_Data=0xf7ff; delay(); *P_IOB_Data=0xffff; delay(); *P_IOA_Data=g_Data[iData[3]]; *P_IOB_Data=0xefff; delay(); *P_IOB_Data=0xffff; delay(); *P_IOA_Data=g_Data[iData[2]]; *P_IOB_Data=0xdfff; delay(); *P_IOB_Data=0xffff; delay(); *P_IOA_Data=g_Data[iData[1]]; *P_IOB_Data=0xbfff; delay(); *P_IOB_Data=0xffff; delay(); *P_IOA_Data=g_Data[iData[0]]; *P_IOB_Data=0x7fff; delay(); *P_IOB_Data=0xffff; }