单片机交通灯c程序 只有红绿灯 和数码显示.doc

参考51单片机C语言创新教程温子祺等著。源码转自：51单片机C语言创新教程。/*实验名称:交通灯实验 *描 述:交通灯实验要求红灯亮15秒，绿灯亮10秒，黄灯亮5秒， 当红灯切换为绿灯或者绿灯切换为红灯， 要实现灯闪烁。红灯、绿灯、黄灯的点亮持续时间可以通过串口来修改， 并在下一个循环中更新数值。 *作 者:温子祺 *修改日期:2010/5/4 *说 明:代码注释与讲解详见51单片机C语言创新教程温子祺等著，北京航空航天大学出版社 */#include stc.htypedef unsigned char UINT8;typedef unsigned intUINT16;typedef unsigned long UINT32; typedef char INT8;typedef int INT16;typedef long INT32; #define TIMER0_INITIAL_VALUE 5000#define HIGH 1#define LOW 0#define ON 1#define OFF 0#define SEG_PORT P0#define LS164_DATA(x) if(x)P0_4=1;else P0_4=0; #define LS164_CLK(x) if(x)P0_5=1;else P0_5=0; #define NORTH_R_LIGHT(x) if(x)P2_0=0;else P2_0=1;#define NORTH_Y_LIGHT(x) if(x)P2_1=0;else P2_1=1;#define NORTH_G_LIGHT(x) if(x)P2_2=0;else P2_2=1;#define SOUTH_R_LIGHT(x) if(x)P2_3=0;else P2_3=1;#define SOUTH_Y_LIGHT(x) if(x)P2_4=0;else P2_4=1;#define SOUTH_G_LIGHT(x) if(x)P2_5=0;else P2_5=1;#define TRAFFIC_STATUS_1 0#define TRAFFIC_STATUS_2 1#define TRAFFIC_STATUS_3 2 #define UART_MARKER 0xEE UINT8 Timer0IRQEvent=0;UINT8 Time1SecEvent=0;UINT8 Time500MsEvent=0;UINT8 TimeCount=0;UINT8 SegCurPosition=0;UINT8 LightOrgCount4=15,5,15,5;UINT8 LightCurCount4=15,5,15,5;UINT8 TrafficLightStatus=0;code UINT8 SegCode10 =0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90; UINT8 SegBuf4 =0;code UINT8 SegPosition4=0x07,0x0b,0x0d,0x0e;typedef struct _LIGHT_VAL UINT8 Head; UINT8 val4; LIGHT_VAL;typedef union _LIGHT_VAL_EX LIGHT_VAL lv; UINT8 p5; LIGHT_VAL_EX;void LS164Send(UINT8 byte) UINT8 j; for(j=0;j=7;j+) if(byte&(1=4) SegCurPosition=0; void TimerInit(void) TH1 = 0; TL1 = 0; TH0 = (65536-TIMER0_INITIAL_VALUE)/256; TL0 = (65536-TIMER0_INITIAL_VALUE)%256; /定时1MS TMOD = 0x51;/*01010001 T1计数,T0定时*/ void Timer0Start(void) TR0 = 1;/启动计时器1 ET0 = 1;void Timer0Stop(void) TR0 = 0;/启动计时器1 ET0 = 0; void PortInit(void) P0=P1=P2=P3=0xFF;void UartInit(void)SCON=0x40;T2CON=0x34;RCAP2L=0xD9;RCAP2H=0xFF;REN=1; ES=1;void UartSendByte(UINT8 byte)SBUF=byte; while(TI=0); TI=0;void UartPrintfString(INT8 *str)while(str & *str) UartSendByte(*str+); void main(void) UINT8 i=0;PortInit();TimerInit(); Timer0Start(); UartInit(); RefreshDisplayBuf(LightCurCount0); EA=1; NORTH_R_LIGHT(ON); SOUTH_G_LIGHT(ON);while(1) if(Timer0IRQEvent) Timer0IRQEvent=0; TimeCount+; if(TimeCount=200) TimeCount=0;if(LightCurCount0) TrafficLightStatus=0; else if(LightCurCount1) TrafficLightStatus=1; else if(LightCurCount2) TrafficLightStatus=2; else if(LightCurCount3) TrafficLightStatus=3; else for(i=0;i=5) for(cnt=1;cnt5;cnt+) LightOrgCountcnt-1=LightValEx.lv.valcnt; LightCurCountcnt-1=LightValEx.lv.valcnt; cnt=0; UartPrintfString(设置交通灯完成rn); else cnt=0; void Timer0IRQ(