定时器的扩展
|
#include”reg51.h” #include”intrins.h” #define ST_0_5S 2500 #define ST_1S 5000 #define ST_1_5S 7500 #define ST_2S 10000 #define ST_2_5S 12500 #define ST_3S 15000 #define ST_3_5S 17500 #define ST_4S 20000 sbit LED1=P2^0; sbit LED2=P2^1; sbit LED3=P2^2; sbit LED4=P2^3; sbit LED5=P2^4; sbit LED6=P2^5; sbit LED7=P2^6; sbit LED8=P2^7; bit SoftTimer0Enable=0; unsigned int SoftTimer0Counter=0; bit SoftTimer0Over=0; bit SoftTimer1Enable=0; unsigned int SoftTimer1Counter=0; bit SoftTimer1Over=0; bit SoftTimer2Enable=0; unsigned int SoftTimer2Counter=0; bit SoftTimer2Over=0; bit SoftTimer3Enable=0; unsigned int SoftTimer3Counter=0; bit SoftTimer3Over=0; bit SoftTimer4Enable=0; unsigned int SoftTimer4Counter=0; bit SoftTimer4Over=0; bit SoftTimer5Enable=0; unsigned int SoftTimer5Counter=0; bit SoftTimer5Over=0; bit SoftTimer6Enable=0; unsigned int SoftTimer6Counter=0; bit SoftTimer6Over=0; bit SoftTimer7Enable=0; unsigned int SoftTimer7Counter=0; bit SoftTimer7Over=0; void main(void) { TMOD=0x02;//定时器工作方式2，自装 TH0=TL0=0x38;//设定硬件时基0.2ms ET0=1; TR0=1; EA=1; SoftTimer0Counter=ST_0_5S; SoftTimer0Enable=1; SoftTimer1Counter=ST_1S; SoftTimer1Enable=1; SoftTimer2Counter=ST_1_5S; SoftTimer2Enable=1; SoftTimer3Counter=ST_2S; SoftTimer3Enable=1; SoftTimer4Counter=ST_2_5S; SoftTimer4Enable=1; SoftTimer5Counter=ST_3S; SoftTimer5Enable=1; SoftTimer6Counter=ST_3_5S; SoftTimer6Enable=1; SoftTimer7Counter=ST_4S; SoftTimer7Enable=1; while(1) { if(_testbit_(SoftTimer0Over)) { SoftTimer0Counter=ST_0_5S; LED1=~LED1; } if(_testbit_(SoftTimer1Over)) { SoftTimer1Counter=ST_1S; LED2=~LED2; } if(_testbit_(SoftTimer2Over)) { SoftTimer2Counter=ST_1_5S; LED3=~LED3; } if(_testbit_(SoftTimer3Over)) { SoftTimer3Counter=ST_2S; LED4=~LED4; } if(_testbit_(SoftTimer4Over)) { SoftTimer4Counter=ST_2_5S; LED5=~LED5; } if(_testbit_(SoftTimer5Over)) { SoftTimer5Counter=ST_3S; LED6=~LED6; } if(_testbit_(SoftTimer6Over)) { SoftTimer6Counter=ST_3_5S; LED7=~LED7; } if(_testbit_(SoftTimer7Over)) { SoftTimer7Counter=ST_4S; LED8=~LED8; } } } void TimerBaseByTimer0(void) interrupt 1 { if(SoftTimer0Enable) { if(SoftTimer0Counter) { SoftTimer0Counter–; if(!SoftTimer0Counter) { SoftTimer0Over=1; } } } if(SoftTimer1Enable) { if(SoftTimer1Counter) { SoftTimer1Counter–; if(!SoftTimer1Counter) { SoftTimer1Over=1; } } } if(SoftTimer2Enable) { if(SoftTimer2Counter) { SoftTimer2Counter–; if(!SoftTimer2Counter) { SoftTimer2Over=1; } } } if(SoftTimer3Enable) { if(SoftTimer3Counter) { SoftTimer3Counter–; if(!SoftTimer3Counter) { SoftTimer3Over=1; } } } if(SoftTimer4Enable) { if(SoftTimer4Counter) { SoftTimer4Counter–; if(!SoftTimer4Counter) { SoftTimer4Over=1; } } } if(SoftTimer5Enable) { if(SoftTimer5Counter) { SoftTimer5Counter–; if(!SoftTimer5Counter) { SoftTimer5Over=1; } } } if(SoftTimer6Enable) { if(SoftTimer6Counter) { SoftTimer6Counter–; if(!SoftTimer6Counter) { SoftTimer6Over=1; } } } if(SoftTimer7Enable) { if(SoftTimer7Counter) { SoftTimer7Counter–; if(!SoftTimer7Counter) { SoftTimer7Over=1; } } } } |
上述程序的简化版，去除了使能条件
|
#include”reg51.h” #include”intrins.h” #define ST_0_5S 2500 #define ST_1S 5000 #define ST_1_5S 7500 #define ST_2S 10000 #define ST_2_5S 12500 #define ST_3S 15000 #define ST_3_5S 17500 #define ST_4S 20000 sbit LED1=P2^0; sbit LED2=P2^1; sbit LED3=P2^2; sbit LED4=P2^3; sbit LED5=P2^4; sbit LED6=P2^5; sbit LED7=P2^6; sbit LED8=P2^7; unsigned int SoftTimer0Counter=0; bit SoftTimer0Over=0; unsigned int SoftTimer1Counter=0; bit SoftTimer1Over=0; unsigned int SoftTimer2Counter=0; bit SoftTimer2Over=0; unsigned int SoftTimer3Counter=0; bit SoftTimer3Over=0; unsigned int SoftTimer4Counter=0; bit SoftTimer4Over=0; unsigned int SoftTimer5Counter=0; bit SoftTimer5Over=0; unsigned int SoftTimer6Counter=0; bit SoftTimer6Over=0; unsigned int SoftTimer7Counter=0; bit SoftTimer7Over=0; void main(void) { TMOD=0x02;//定时器工作方式2 TH0=TL0=0x38;//设定硬件时基0.2ms ET0=1; TR0=1; EA=1; SoftTimer0Counter=ST_0_5S; SoftTimer1Counter=ST_1S; SoftTimer2Counter=ST_1_5S; SoftTimer3Counter=ST_2S; SoftTimer4Counter=ST_2_5S; SoftTimer5Counter=ST_3S; SoftTimer6Counter=ST_3_5S; SoftTimer7Counter=ST_4S; while(1) { if(_testbit_(SoftTimer0Over)) { SoftTimer0Counter=ST_0_5S; LED1=~LED1; } if(_testbit_(SoftTimer1Over)) { SoftTimer1Counter=ST_1S; LED2=~LED2; } if(_testbit_(SoftTimer2Over)) { SoftTimer2Counter=ST_1_5S; LED3=~LED3; } if(_testbit_(SoftTimer3Over)) { SoftTimer3Counter=ST_2S; LED4=~LED4; } if(_testbit_(SoftTimer4Over)) { SoftTimer4Counter=ST_2_5S; LED5=~LED5; } if(_testbit_(SoftTimer5Over)) { SoftTimer5Counter=ST_3S; LED6=~LED6; } if(_testbit_(SoftTimer6Over)) { SoftTimer6Counter=ST_3_5S; LED7=~LED7; } if(_testbit_(SoftTimer7Over)) { SoftTimer7Counter=ST_4S; LED8=~LED8; } } } void TimerBaseByTimer0(void) interrupt 1 { if(SoftTimer0Counter) { SoftTimer0Counter–; if(!SoftTimer0Counter) { SoftTimer0Over=1; } } if(SoftTimer1Counter) { SoftTimer1Counter–; if(!SoftTimer1Counter) { SoftTimer1Over=1; } } if(SoftTimer2Counter) { SoftTimer2Counter–; if(!SoftTimer2Counter) { SoftTimer2Over=1; } } if(SoftTimer3Counter) { SoftTimer3Counter–; if(!SoftTimer3Counter) { SoftTimer3Over=1; } } if(SoftTimer4Counter) { SoftTimer4Counter–; if(!SoftTimer4Counter) { SoftTimer4Over=1; } } if(SoftTimer5Counter) { SoftTimer5Counter–; if(!SoftTimer5Counter) { SoftTimer5Over=1; } } if(SoftTimer6Counter) { SoftTimer6Counter–; if(!SoftTimer6Counter) { SoftTimer6Over=1; } } if(SoftTimer7Counter) { SoftTimer7Counter–; if(!SoftTimer7Counter) { SoftTimer7Over=1; } } } |