Nguyên văn bởi vakk (Post 61986)

#include <pic16f886.h>
#include <htc.h>
__CONFIG(FOSC_HS&WDTE_OFF&PWRTE_ON&MCLRE_ON&CP_OFF &CPD_OFF&BOREN_OFF&IESO_OFF&FCMEN_OFF&LVP_OFF&DEBU G_OFF);
__CONFIG(BOR4V_BOR21V&WRT_OFF);
int i=0;

const unsigned int sine[500]={400,405,409,414,418,423,427,432,436,441,445,450, 454,459,463,467,472,476,481,485,489,494,498,503,
507,511,515,520,524,528,532,537,541,545,549,553,55 7,561,565,569,573,577,581,585,589,593,597,600,604,
608,612,615,619,622,626,629,633,636,640,643,646,65 0,653,656,659,662,665,668,671,674,677,680,683,686,
688,691,694,696,699,701,704,706,709,711,713,715,71 8,720,722,724,726,728,729,731,733,735,736,738,739,
741,742,744,745,746,747,749,750,751,752,753,754,75 4,755,756,757,757,758,758,759,759,759,760,760,760,
760,760,760,760,760,760,759,759,759,758,758,757,75 7,756,755,754,754,753,752,751,750,749,748,746,745,
744,742,741,740,738,736,735,733,731,730,728,726,72 4,722,720,718,716,713,711,709,707,704,702,699,697,
694,691,689,686,683,681,678,675,672,669,666,663,66 0,656,653,650,647,643,640,637,633,630,626,623,619,
616,612,608,605,601,597,593,589,586,582,578,574,57 0,566,562,558,554,550,546,541,537,533,529,525,520,
516,512,507,503,499,494,490,486,481,477,472,468,46 4,459,455,450,446,441,437,432,428,423,419,414,410,
405,401,396,392,387,382,378,373,369,364,360,355,35 1,347,342,338,333,329,324,320,315,311,307,302,298,
294,289,285,281,277,272,268,264,260,256,251,247,24 3,239,235,231,227,223,219,215,212,208,204,200,196,
193,189,185,182,178,175,171,168,164,161,157,154,15 1,148,144,141,138,135,132,129,126,123,120,117,115,
112,109,107,104,101,99,96,94,92,89,87,85,83,81,79, 77,75,73,71,69,67,66,64,62,61,
59,58,56,55,54,53,52,50,49,48,47,47,46,45,44,44,43 ,42,42,41,41,41,40,40,40,
40,40,40,40,40,40,41,41,41,42,42,43,43,44,45,45,46 ,47,48,49,50,51,52,53,55,
56,57,59,60,62,63,65,67,68,70,72,74,76,78,80,82,84 ,86,89,91,93,96,98,100,103,
106,108,111,114,116,119,122,125,128,131,134,137,14 0,143,146,150,153,156,159,163,166,170,173,177,180,
184,188,191,195,199,202,206,210,214,218,222,226,23 0,234,238,242,246,250,254,258,262,266,271,275,279,
283,288,292,296,301,305,309,314,318,323,327,331,33 6,340,345,349,354,358,363,367,372,376,381,385,390,
394
};
void PORT(void)
{
TRISA=0x00;
TRISB=0x00;
TRISC=0x00;
PORTA=0x00;
PORTB=0x00;
PORTC=0x00;
}

void setduty(int duty)
{
int temp;
temp=duty&0x003;
CCP1CON=(CCP1CON&0x8C)|(temp<<4);
CCPR1L=duty>>2;

}


void PWM(void)
{
T2CON=0x00;//pre=1,post=1
TMR2IE=0;
TMR2IF=0;
TMR2=0;
PR2=199;
CCP1CON=0x8C;

PWM1CON=0x04;

}
void main(void)
{
PORT();

PWM();
TMR2ON=1;
while(1)
{
RC0^=1;

setduty(sine[i]);
while(!TMR2IF){}
i++;
if(i>=500) i=0;

TMR2IF=0;
}
}