students12
23-09-2006, 11:04 AM
Minh da lam nhu ban noi, mach da nap duoc, nhung khai bao cac thuoc tinh cua chip nhung the nao, ban co the noi giup minh duoc khong?
Co phai neu nhu su dung hai chan de noi thach anh thi mat 2 I/O ko?
Neu mac nhu ban thi minh con su dung duoc may I/O? vi minh muon su dung 2ADC, 1 cong xuat ra PWM.
minh viet doan chuong trinh sau:
#include<12f683.h>
#use delay(clock=4000000)
void main()
{
while(1)
{
output_high(Pin_A0);
delay(500);
output_low(Pin_A0);
delay(500);
}
}
Chuong trinh nay ko bien dich duoc.
no cu bao error : #use delay
va khi dung timer0() : thi chuong trinh viet nhu sau:
#include<12f683.h>
#use delay(clock=4000000)
void main()
{
set_timer0(0);
while(1)
{
output_high(Pin_A0);
if(get_timer()>500)
{
output_low(Pin_A0);
get_timer(0);
}
}
}
Cung khong thay den led nhap nhay gi ca, dung osillo do cung ko thay xung dau.
Con neu viet nhu sau thi co xung nhung ko deu:
#include<12f683.h>
void main()
{
while(1)
{
output_high(Pin_A0);
output_low(Pin_A0);
}
}
Vi minh dang tap tenh nghien cuu Pic, va dang lam bai tap lon rat gap.
Neu ban co chuong trinh xuat PWM tu dong theo tin hieu dien ap bien doi do ADC nhan ve thi gui cho minh tham khao thu nhe.
Cam on ban rat nhieu.
Co phai neu nhu su dung hai chan de noi thach anh thi mat 2 I/O ko?
Neu mac nhu ban thi minh con su dung duoc may I/O? vi minh muon su dung 2ADC, 1 cong xuat ra PWM.
minh viet doan chuong trinh sau:
#include<12f683.h>
#use delay(clock=4000000)
void main()
{
while(1)
{
output_high(Pin_A0);
delay(500);
output_low(Pin_A0);
delay(500);
}
}
Chuong trinh nay ko bien dich duoc.
no cu bao error : #use delay
va khi dung timer0() : thi chuong trinh viet nhu sau:
#include<12f683.h>
#use delay(clock=4000000)
void main()
{
set_timer0(0);
while(1)
{
output_high(Pin_A0);
if(get_timer()>500)
{
output_low(Pin_A0);
get_timer(0);
}
}
}
Cung khong thay den led nhap nhay gi ca, dung osillo do cung ko thay xung dau.
Con neu viet nhu sau thi co xung nhung ko deu:
#include<12f683.h>
void main()
{
while(1)
{
output_high(Pin_A0);
output_low(Pin_A0);
}
}
Vi minh dang tap tenh nghien cuu Pic, va dang lam bai tap lon rat gap.
Neu ban co chuong trinh xuat PWM tu dong theo tin hieu dien ap bien doi do ADC nhan ve thi gui cho minh tham khao thu nhe.
Cam on ban rat nhieu.