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下列这段程序为定时 1s 的溢出中断程序,计时时间在数码管上进行显示。有关该程序叙述正确的是() interrupt void isrT1Out(void) { uint8 temp; DisableInterrupt(); if(ledbuf[3]==0x3A) { ledbuf[3]='0'; ledbuf[2]++; if(ledbuf[2]=='6') { ledbuf[2]='0'; ledbuf[1]++; if(ledbuf[1]==0x3A) { ledbuf[1]='0'; ledbuf[0]++; if(ledbuf[0]=='4') ledbuf[0]='0'; } } } temp = TPM_CSTR(1); TPM_CSTR(1) &= ~(TPM1SC_TOF_MASK); EnableInterrupt(); }A.
该程序不能实现所要求功能
B.
计时最长时间为 60 分钟
C.
计时到最大时间后停止计时
D.
ledbuf[] 需定义为全局变量
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