hỏi về lập trình cơ bản cho pic6f877a

**thanh_30april** · 06-04-2011, 10:06 AM

Cac bac cho em hoi:
Em lap trinh dung chan ccp1 de tao xung PWM nhung khong hieu sao em mo phong va do tin hieu o chan PWM khong thay gi,mong cac bac chi giup.Day la code cua chuong trinh:
/////////////////////////////////////
#include <16f877A.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#byte porta=0x05
#use fast_io(a)
#use fast_io(c)
void main()
{
set_tris_a(0x00);
set_tris_c(0x00);
SETUP_CCP1(ccp_pwm);
SETUP_TIMER_2(T2_DIV_BY_4,200,1);
set_pwm1_duty(100);
while(1)
{
output_high(pin_a0);
delay_ms(10);
output_low(pin_a0);
delay_ms(10);
}
}

Em gui kem ca file mo phong.

06-04-2011, 10:06 AM	#1
thanh_30april Nhập môn đệ tử Tham gia ngày: Jan 2010 Bài gửi: 9 :	PWM voi pic 16f877a Cac bac cho em hoi: Em lap trinh dung chan ccp1 de tao xung PWM nhung khong hieu sao em mo phong va do tin hieu o chan PWM khong thay gi,mong cac bac chi giup.Day la code cua chuong trinh: ///////////////////////////////////// #include <16f877A.h> #fuses HS,NOWDT,NOPROTECT,NOLVP #use delay(clock=20000000) #byte porta=0x05 #use fast_io(a) #use fast_io(c) void main() { set_tris_a(0x00); set_tris_c(0x00); SETUP_CCP1(ccp_pwm); SETUP_TIMER_2(T2_DIV_BY_4,200,1); set_pwm1_duty(100); while(1) { output_high(pin_a0); delay_ms(10); output_low(pin_a0); delay_ms(10); } } Em gui kem ca file mo phong.