Finalmente, he acabado el código, no sé si estará bien, pero me gustaría que le echárais un vistazo si podéis, muchas gracias!!!!
#include <p12f683.h>
#pragma config WDT = OFF // Cancelling Watch Dog Timer
//Variables declaration
int i;
int counter;
int active;
int chirpCounter;
void main(){
init();
while(1){
//checking if there has been a change at any GPIO inputs
if (INTCONbits.GPIF==1){
if (GPIObits.GP5==0){
wave1();
sleep();
}
if (GPIObits.GP4==0){
wave2();
sleep();
}
if (GPIObits.GP1==0){
wave3();
sleep();
}
}
}
}
void init(){
configPort();
configTimer();
}
void configPort(){
TRISIO=0b00111010; //establishing inputs/outputs of the port
GPIObits.GP2=0; //clearing OUTPUT to the transducer
IOC = 0b00110010; //enabling Interrupt-on-change GPIO register
}
void configTimer(){
OPTION_REG=0b00000000; //Internal clock, prescaler 1:2
T1CON=0b00000000; //Internal clock, prescaler 1:1
T2CON=0b00000010; //Prescaler 1:16
}
void wave1(){
INTCONbits.GPIF=0; //clearing GPIO interrupt flag
counter=0;
PIE1bits.TMR2IE=1; //enabling Timer 2 interrupt
PIR1bits.TMR2IF=0; //clearing Timer2 Interrupt Flag
TMR2 = 0x06; //Need to count 250 --> 2 mseg
T2CONbits.TMR2ON=1; //timer2 starts
//Same operation for 30 seconds
while(counter<15000){
//Each time TMR2 overflows, it has to be restarted (15000 times)
if(PIR1bits.TMR2IF==1){
PIR1bits.TMR2IF=0;
counter++;
TMR2 = 0x06;
T2CONbits.TMR2ON=1;
}
GPIObits.GP0=1; //lighting LED
signal40();
}
GPIObits.GP0=0; //switching LED off
}
void wave2(){
INTCONbits.GPIF=0; //clearing GPIO interrupt flag
counter=0;
PIE1bits.TMR2IE=1; //enabling Timer 2 interrupt
PIR1bits.TMR2IF=0; //clearing Timer2 Interrupt Flag
TMR2 = 0x06; //Need to count 250 --> 2 mseg
T2CONbits.TMR2ON=1; //timer2 starts
INTCONbits.T0IE=1; //enabling Timer 0 interrupt
INTCONbits:T0IF=0; //clearing Timer0 Interrupt Flag
TMR0 = 0x06; //need to count 250 ms for a
//modulation frequency of 2 KHz
while(counter<15000){
//Each time TMR2 overflows, it has to be restarted (15000 times)
if(PIR1bits.TMR2IF==1){
PIR1bits.TMR2IF=0;
counter++;
TMR2 = 0x06;
T2CONbits.TMR2ON=1;
}
GPIObits.GP0=1; //lighting LED
if(active){
while(!INTCONbits.T0IF){
signal40();
}
INTCONbits.T0IF=0;
TMR0=0x06;
active=0;
}
while(!INTCONbits.T0IF){
signal20();
}
INTCONbits.T0IF=0;
TMR0=0x06;
active=1;
}
GPIObits.GP0=0; //switching LED off
}
void wave3(){
INTCONbits.GPIF=0; //clearing GPIO interrupt flag
counter=0;
chirpCounter=0;
PIE1bits.TMR2IE=1; //enabling Timer 2 interrupt
PIR1bits.TMR2IF=0; //clearing Timer2 Interrupt Flag
TMR2 = 0x06; //Need to count 250 --> 2 mseg
T2CONbits.TMR2ON=1; //timer2 starts
INTCONbits.T0IE=1; //enabling Timer 0 interrupt
INTCONbits:T0IF=0; //clearing Timer0 Interrupt Flag
TMR0=0x06; //need to count 250us
//Same operation for 30 seconds
while(counter<15000){
//Each time TMR2 overflows, it has to be restarted (15000 times)
if(PIR1bits.TMR2IF==1){
PIR1bits.TMR2IF=0;
counter++;
TMR2 = 0x06;
T2CONbits.TMR2ON=1;
}
GPIObits.GP0=1; //lighting LED
while(chirpCounter<40){
while(!INTCONbits.T0IF){
if(chirpCounter==0)
signal40();
if(chirpCounter>0 && chirpCounter<40)
GPIObits.GP2=0;
}
chirpCounter++;
}
if(chirpCounter==40)
chirpCounter=0;
}
GPIObits.GP0=0; //switching LED off
}
void signal40(){
PIE1bits.TMR1IE=1; //enabling Timer1 interrupt
PIR1bits.TMR1IF=0; //assuring that the Timer1 interrupt flag is //cleared
TMR1H=0xFF; //initiating counter to 65511, as it is necessaryto //count 25 with prescaler 1:1 to obtain 12.5 us of duty //cycle (50%), which are needed for the signal of 40 KH TMR1L=0xE7;
T1CONbits.TMR1ON=1; //starting Timer1
//when TMR1 overflows, it is time to change the level of
//transducer signal
if(PIR1bits.TMR1IF==1){
if(GPIObits.GP2==0){
GPIObits.GP2=1;
}
GPIObits.GP2=0;
}
}
void signal20(){
PIE1bits.TMR1IE=1; //enabling Timer1 interrupt
PIR1bits.TMR1IF=0; //assuring that the Timer1 interrupt flag is //cleared
TMR1H=0xFF; //initiating counter to 65511, as it is necessary to //count 50 with prescaler 1:1 to obtain 25 us of duty //cycle (50%), which are needed for the signal of 20 KH TMR1L=0xCE;
T1CONbits.TMR1ON=1; //starting Timer1
//when TMR1 overflows, it is time to change the level of
//transducer signal
if(PIR1bits.TMR1IF==1){
if(GPIObits.GP2==0){
GPIObits.GP2=1;
}
GPIObits.GP2=0;
}
}
Muchisimas gracias MLO por todo, la ayuda ha sido fundamental;me queda todavía simular con MPLAB, seguro que me da errores por todos lados!!!! pero si pudierais echarle un vistacillo y ver si veis algo a primera vista, os lo agradeceria!!!!
