PIC16F877A的50HZ正弦波 PIC16F877A的50HZ正弦波

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1 #include //包含单片机内部资源预定义 2 #include 3 4 unsigned char const sin_32[]={104,109,114,119,124,128,133,137,142,146,150,154,157,161,164,//15 5 167,169,172,174,176,177,178,179,180,180,180,180,179,178,176,175,173,171,168,165,//20 6 162,159,156,152,148,144,140,135,131,126,121,116,111,106,101,96,91,86,81,76,72,67,63,//23 7 58,54,50,46,43,39,36,33,31,28,26,24,23,22,21,20,20,20,20,21,22,24,25,27,29,32,35,38,//42 8 41,44,48,52,56,60,65,69,74,79,84,89,94,99 9 }; //浮点型精度高，换其他会出现尖角 10 11 void work0(); 12 unsigned char set_pwm; 13 void main(void) 14 { 15work0(); 16while(1) 17{ 18} 19 } 20 21 void work0()//m=0.8; T=(PR2+1)*4*f*TIMR2分频 22 { 23//CCPR1L=0X00; //设置CCP1,0%的脉宽输出 24TRISC=0X00; //PORTC are outputs 25CCP1CON=0x0C; //0000 1100，设置CCP1为PWM工作方式，且工作循环位的低两位为00 26PR2=199; //设置PWM周期:(PR2+1)*4*Tosc*(TMR2预分频数1)=200u(5k) 27T2CON=0x04; //Tc赋值=T*D=(PR2+1)*D=200*D 28CCP1IE=1; 29INTCON=0xC0; //GIE=1,开总中断，开启第一外设中断外围功能模块中断 30TMR2IE=1; TMR2IF=0; 31 } 32 33 //interrupt// 34 void interrupt pic(void) 35 { 36if(TMR2IF&TMR2IE) 37{ 38set_pwm++; 39TMR2IF=0; CCP1IF=0; 40CCPR1L=sin_32[set_pwm]; 41if(set_pwm==99) set_pwm=0; 42} 43 }

【PIC16F877A的50HZ正弦波】
转载于:https://www.cnblogs.com/wangh0802PositiveANDupward/archive/2012/08/11/2633416.html