#include <ioavr.h>
#include <ina90.h>
#include "delay.h"
#include <stdbool.h>
// my defines :
#define set(port,pin) port |= (1<<pin)
#define reset(port,pin) port &= ~(1<<pin)
#define invert(port,pin) port ^= (1<<pin)
#define input_rf (PINB&(1<<PINB1))
#define output_relay PORTD
#define high 1
#define low 0
#define true 1
#define false 0
#define timer_on TCCR0B=0x02
#define timer_off TCCR0B=0x00
// my prototype :
void default_setting (void);
// global variables:
unsigned long int i,j;
float result;
unsigned char num_of_bit,remote_temp[24],remote_crc[24],remote_final[24];
bool start_bit,remote_read,low_state,high_state,state_bit;
int main( void )
{
static unsigned char k;
CLKPR=0x80;
CLKPR=0x00;
DDRD=0xFF;
default_setting();
TIMSK0=0x01; // Timer/Counter 0 Interrupt(s) initialization
__enable_interrupt();
while (1)
{
// Place your code here
if((start_bit==false)&&(remote_read==true)){
timer_off;
for(k=0;k<24;k++)
remote_crc[k]=remote_temp[k];
// invert(PORTD,1);
default_setting();
}
}
}
// set the defult setting of variables and flags:
void default_setting (void){
start_bit=false;
remote_read=false;
low_state=false;
high_state=true;
state_bit=low;
num_of_bit=0;
i=0;
j=0;
TCNT0=0xF6;
timer_on ;
/* Timer/Counter 0 initialization
Clock source: System Clock
Clock value: 1000.000 kHz
Mode: Normal top=0xFF*/
}
// Timer 0 overflow interrupt service routine
#pragma vector=TIMER0_OVF_vect
__interrupt void TIMER0_OVF(void){
// Reinitialize Timer 0 value
TCNT0=0xF6;
// Place your code here
if(input_rf&&high_state)i++,low_state=true;
if((input_rf==false)&&low_state)j++,high_state=false;
if(input_rf&&low_state)low_state=false;
if((high_state==0)&&(low_state==0)&&(remote_read==0)){
result=j/i;
if(result>5)num_of_bit=0,start_bit=0;//this is start bit or premble in data sheet
else{
if((i>j)&&(start_bit==0)&&(remote_read==0))state_bit=high;
if((i<j)&&(start_bit==0)&&(remote_read==0))state_bit=low;
remote_temp[num_of_bit]=state_bit;
if(++num_of_bit>23)remote_read=true;
}
}
}
دیدگاه