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se07860
Joined: 13 May 2008
Posts: 5
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| Problem with input |
 Posted: Tue May 13, 2008 3:23 am |
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Good morning,
i have a problem with the input pins of my uprocessor.
It doesn't matter what i have in the input pins of portA. I always get the same values. I have the inputs with pull-ups and switches, is very simple this part, but doesn't work
Maybe is a problem of setup, but i can't find it.
The pic is a 16F876A
This is the .h code:
| Code: |
#include <16F876A.h>
#device adc=8
#FUSES NOWDT, XT, NOPUT, PROTECT, NODEBUG, NOBROWNOUT, NOLVP, NOCPD, WRT_50%
#use delay(clock=4000000)
#define PuenteFacial PIN_A0
#define PuenteCCompact PIN_A1
#define PuenteCorporal PIN_A2
#define PuenteComun PIN_A3
#define ParoCorporal PIN_A4
#define MarchaCorporal PIN_A5
#define Zumbador PIN_C2
#define Troceado PIN_C3
#define RelePM PIN_C5
#define LEDOff PIN_C6
#define LEDOn PIN_C7
#use rs232(baud=9600,parity=N,xmit=PIN_B4,rcv=PIN_B5,bits=8,invert)
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And here is the .c code
| Code: |
#include "D:\Documents and Settings\Javier\Escritorio\Laboratorio\TF8 0.1B\TF8B.h"
#include <stdio.h>
void main()
{
char c;
int pm, conex, chop, salida, puesta_en_marcha,i;
int bot_paro,recepcion;
int16 aux;
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
//setup_psp(PSP_DISABLED);
setup_spi(SPI_SS_DISABLED);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
// TODO: USER CODE!!
delay_ms(30000);
output_low(Troceado); output_low(PuenteComun);
output_low(LEDOn); output_low(LEDOff);
chop=0; salida=0; puesta_en_marcha=0; recepcion=0; pm=1; conex=0; i=0; bot_paro=0;
while(1)
{
if(kbhit())
{
c = getc();
switch (c){
case '0': chop=10; break;
case '1': chop=20; break;
case '2': chop=30; break;
case '3': chop=40; break;
case '4': chop=50; break;
case '5': chop=60; break;
case '6': chop=70; break;
case '7': chop=80; break;
case '8': chop=90; break;
case '9': chop=100; break;
case 'F': recepcion=0; pm=2; salida=1; break; //aquí debemos comprobar si la pieza de mano está puesta o no
case 'c': recepcion=0; pm=3; salida=1; break; //aquí debemos comprobar si la pieza de mano está puesta o no
case 'C': recepcion=0; pm=1; salida=0; break; //aquí debemos comprobar si la pieza de mano está puesta o no
case 'M': i=0; bot_paro=0; if(chop==0){puesta_en_marcha=0;} else{puesta_en_marcha=1;} break;
case 'P': i=0; output_low(RelePM); bot_paro=1; puesta_en_marcha=0; conex=0; if(salida==0) {output_low(LEDOn); output_high(LEDOff);} break;
case 'R': recepcion=1; break; //Comprobamos si la pantalla confirma la recepcion de la orden
case 'S': i=0; bot_paro=0; salida=0; chop=0; pm=1; conex=0; output_low(LEDOff); break;
default: break; //puesta_en_marcha=0; chop=0; c='x'; break;
} //Fin del switch
}//Fin de if(kbhit())
else
{
aux=input(PIN_A0);
write_eeprom(1,aux);
aux=input(PIN_A1);
write_eeprom(2,aux);
aux=input(PIN_A2);
write_eeprom(3,aux);
aux=input(PIN_A3);
write_eeprom(4,aux);
aux=input(PIN_A4);
write_eeprom(5,aux);
aux=input(PIN_A5);
write_eeprom(6,aux);
output_high(Zumbador);
while(1){}
if(puesta_en_marcha==1)
{
if (salida==1) //Si la salida es [spam], activamos el relé y paramos las luces de la corporal
{
output_high(RelePM);
output_low(LEDOn);
output_low(LEDOff);
}
else
{
output_low(RelePM);
output_high(LEDOn);
output_low(LEDOff);
}
if(i>chop) output_low(Troceado);
else output_high(Troceado);
i++;
if(i>100) i=0;
} //Fin if(puesta_en_marcha==1)
else{
//if(aux==0){if(bot_paro==1){if(salida==0){output_high(Zumbador); bot_paro=0; putc(77);}}}
/* if (recepcion==0) { //Tenemos que enviar una info a la pantalla confirmando si la pieza de mano esta conectada o no
output_high(PuenteComun);
if((pm==1)&&(PuenteCorporal==1)) conex++; //Hay que ponerlos a 0 que es un pull-up!!!
if((pm==2)&&(PuenteFacial==1)) conex++;
if((pm==3)&&(PuenteCcompact==1)) conex++;
if(conex==1)
{
conex=2;
putc(86);//Es una 'v' de verificado
}//Fin if(conex==1)
if(conex>2) conex=2;
}*/
} //Fin else-if(puesta_en_marcha==1)
} //Fin else-if(kbhit())
} //Fin while(1)
}//Fin programa
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Thanks |
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Ttelmah
Guest
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| Posted: Tue May 13, 2008 4:12 am |
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How often have you run this?.
I can't follow the whole thing through, but it appears to have an infinite loop, which if it doesn't find a character on the serial, then proceeds to write 6 bytes to the EEPROM. This seems to repeat indefinately, until a character is seen. Now the EEPROM, has a limited 'write life' on the PIC. A minimum of only 100K cycles. The cycle time is as small as 4mSec, so if the code does what it seems to do, it can potentially destroy the chip's EEPROM in about 400seconds (under 7 minutes). Once destroyed, the value will probably remain fixed, and would give what you are seeing.
Best Wishes |
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Guest
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| Posted: Tue May 13, 2008 5:48 am |
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Thanks for your reply Ttelmah.
The program must be an infinite loop, but the writing on the eeprom is only because i want to verify the switches.
I have modified the code to write the eeprom only the first loop (and i've tried a new chip also).
I get the same input combination A5 A4 A3 A2 A1 A0 -> 0 1 0 0 0 0 but i've verified the Voltage in the pins and are 5V in all of them. Is because of this i think i can have a problem in the settings. |
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se07860
Joined: 13 May 2008
Posts: 5
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| Posted: Tue May 13, 2008 5:51 am |
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| Guest is me, sorry. |
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