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Friday, October 19, 2012

[Code PIC] Mạch đo điện dung

Code PIC mạch đo điện dung:

************************************************** *****************************
Project : Frequency Measurement
Author : pk
************************************************** *****************************/
#include <16f887.h>
#device *=16
#FUSES NOWDT, NOPUT,XT, NOPROTECT, NODEBUG, NOBROWNOUT, NOLVP, NOCPD, NOWRT
#use delay(clock = 4M)


#define LCD_ENABLE_PIN PIN_D3
#define LCD_RS_PIN PIN_D1
#define LCD_RW_PIN PIN_D2
#define LCD_DATA4 PIN_D4
#define LCD_DATA5 PIN_D5
#define LCD_DATA6 PIN_D6
#define LCD_DATA7 PIN_D7

/*
#define LCD_ENABLE_PIN PIN_C0
#define LCD_RS_PIN PIN_D0
#define LCD_RW_PIN PIN_C3
#define LCD_DATA4 PIN_E2
#define LCD_DATA5 PIN_E1
#define LCD_DATA6 PIN_E0
#define LCD_DATA7 PIN_A5
*/

#include <lcd.c>
#use fast_io(c)
//************************************************** ****************************
int i;
float temp,verify;
//************************************************** ****************************

#INT_CCP1
void synchronous_re(){
temp = get_timer1();
set_timer1(0);
}
//------------------------------------------------------------------------------
#INT_CCP2
void synchronous_fe(){
temp = get_timer1();
set_timer1(0);
}
//************************************************** ****************************
void lcd_put_int(int num){
int temp;
unsigned char i = 0, c[5];
temp = num;
if (temp != 0) {
while(temp){
c[i++] = temp%10;
temp /= 10;
}
while(i) lcd_putc(c[--i] + '0');
}
else lcd_putc('0');
}
//************************************************** ****************************
void lcd_put_float(float num){
unsigned int temp;

temp = num/1;
lcd_put_int(temp);
temp = (num - temp)*100;
lcd_putc(',');
lcd_put_int(temp);

}
//************************************************** ****************************
void main(){
set_tris_c(0xff);
set_tris_b(0xff);

lcd_init();
lcd_putc("STARTING");
for(i = 1; i < 9; i++){
lcd_putc(".");
delay_ms(100);
}
SETUP_TIMER_1(T1_INTERNAL|T1_DIV_BY_4);
//SETUP_TIMER_1(T1_INTERNAL|T1_DIV_BY_1);

SETUP_CCP1(CCP_CAPTURE_RE);
SETUP_CCP2(CCP_CAPTURE_FE);

ENABLE_INTERRUPTS(INT_CCP1);
ENABLE_INTERRUPTS(INT_CCP2);
ENABLE_INTERRUPTS(global);

lcd_putc('\f');
lcd_putc("TAN SO HIEN TAI:");

while(1){
if(temp != verify){
verify = temp;
lcd_gotoxy(1,2);
lcd_putc(" ");
lcd_gotoxy(5,2);
lcd_put_float(500000/temp);
lcd_putc("Hz");
delay_ms(100);
}
}
}

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