凌阳61单片机使用7段数码管显示数字时钟地程序.docVIP

凌阳61单片机使用7段数码管显示数字时钟的程序 #include SPCE061v004.h #include unspmacro.h //中断函数定义 void IRQ1(void) __attribute__((ISR)); void IRQ5(void) __attribute__((ISR)); void IRQ6(void) __attribute__((ISR)); enum { RUN, CHGSECOND, CHGMINUTE, CHGHOUR } clock_status; //时钟的状态 unsigned int hour,minute,second; unsigned int show_hour, show_minute, show_second; enum { NOKEY, PRESSING, PRESSED } key_status; //键盘按下与否的状态 unsigned key_code; // 7段LED数码管的字形码，采用高八位输出，决定显示的字形，如: 0、1等 const unsigned int zhixingma[] = { 0x3f00, 0x0600, 0x5b00, 0x4f00, 0x6600, 0x6d00, 0x7c00, 0x0700, 0x7f00,0x6f00 }; //数码管选择的位段码,决定哪一位数码管显示 const unsigned int weiduanma[] = {0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040}; //数码管的两个DD引脚,为时,中间的冒号亮 const unsigned int wei_DD = 0x0081; void display(unsigned int wei, unsigned int number) { *P_IOA_Data = zhixingma[number]; //设置位段码时，不能改变冒号的状态 *P_IOB_Data = weiduanma[wei] | (*P_IOB_Buffer wei_DD); } //取反数码管中间的冒号 void opposite_dots() { *P_IOB_Data = wei_DD ^ (*P_IOB_Buffer); } void delay(unsigned int howlong) { while(howlong--){ unsigned int temp = 0x00ff; *P_Watchdog_Clear = 1; while(temp--); } } void init() { INT_OFF(); *P_IOA_Dir = 0xff00; *P_IOA_Attrib = 0xff00; *P_IOB_Dir = 0x00ff; *P_IOB_Attrib = 0x00ff; *P_TimerA_Data = 0xffff - 256; *P_TimerA_Ctrl = C_SourceA_1 | C_SourceB_256Hz; *P_INT_Ctrl = C_IRQ1_TMA | C_IRQ6_TMB2 | C_IRQ5_2Hz; INT_IRQ(); } void change_clock() { unsigned int key_code = get_key(); static unsigned int max; switch(key_code){ // key_code == 0 will do nothing case 1: switch( clock_status ){ case CHGSECOND: if(++second == 60) second = 0; break; case CHGMINUTE: if(++minute == 60) minute = 0; break; case CHGHOUR: if(++hour == 24) hour =0; break; default