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ramos_luna



Joined: 16 Oct 2015
Posts: 3

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PostPosted: Fri Oct 16, 2015 3:20 pm     Reply with quote
hi all

The frequency is not getting stabilized in output pin_c2, 38Khz. Does anyone know what's wrong with my code ?

sorry very bad my english !
Code:

//#include "emisorNEC.h"
#include <18f4550.h>
#fuses nomclr
#fuses hs // LP,XT,HS,RC
#fuses put
#fuses wdt // NOWDT,WDT
#fuses nolvp // NOLVP,LVP
#fuses nobrownout // NOBROWNOUT,BROWNOUT
#fuses noput // NOPUT,PUT
#fuses nodebug // NODEBUG,DEBUG
#fuses protect // NOPROTECT,PROTECT
#fuses nowrt // NOWRT,WRT_50%,WRT_25%,WRT_5%
#use delay(clock=4Mhz)
#define PIN_PWM PIN_d0
#use rs232 (baud =9600, parity=n,xmit=pin_b2,rcv=pin_b1,bits=8,stream=blue)
#define IR_CODE_TV_ON 0x20DF10Ef//L

void ir_send(int32 code);
boolean first;

void main()
{

setup_ccp1(CCP_PWM);
set_pwm1_duty(0);
setup_timer_2(T2_DIV_BY_1,25,1);//131


for (;;) {

delay_ms(500);
set_pwm1_duty(13);
output_high(pin_D0);
ir_send(IR_CODE_TV_ON);
}
}


void ir_send(unsigned int32 code)
{
unsigned char i = 0;
disable_interrupts(GLOBAL);

// Envío el START
set_pwm1_duty(13);
delay_us(9000);

set_pwm1_duty(0);
delay_us(4500);

// Voy desgranando el código
while (i < 32) {
//#bit first = code.32;

first = bit_test(code,i);
//first = ~first;

fprintf(blue,"%d\n",first);

// Transmitimos un 1
if (first) {
set_pwm1_duty(13);
delay_us(560);
set_pwm1_duty(0);
delay_us(1690);
}

// Transmitimos un 0
else {
set_pwm1_duty(13);
delay_us(560);
set_pwm1_duty(0);
delay_us(560);
}

{
if (first) {
set_pwm1_duty(13);
delay_us(560);
set_pwm1_duty(0);
delay_us(1690);
}

// Transmitimos un 0
else {
set_pwm1_duty(13);
delay_us(560);
set_pwm1_duty(0);
delay_us(560);
}

}
//code <<= 1;
i++;

}

// Bit de parada
set_pwm1_duty(13);
delay_us(560);
set_pwm1_duty(0);

enable_interrupts(GLOBAL);
}
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Fri Oct 16, 2015 11:00 pm     Reply with quote
Quote:
The frequency is not getting stabilized in output pin_c2, 38Khz

The compiler defaults to CPUDIV4 for the oscillator, so your PIC is running
at 1 MHz, and not at 4 MHz. To fix this, add the following fuse:
Code:
#fuses CPUDIV1


Also, you are running the Watchdog Timer, but you never restart it. So,
your PIC will do a watchdog reset about every 2 minutes.

Also, you are enabling Global interrupts, but you don't have any specific
interrupts enabled. So why enable global interrupts ?

There are a few other other things that are a little weird in the fuses,
such as protect, noput, nobrownout. I assume you are running at +5v.
I would have set all those fuses as the opposite of what you have.

Also, I want a 10K MCLR resistor, and without the NOMCLR fuse, so I
can make the board run or not run, with a mouse-click on the Release-
from-Reset button in MPLAB vs. 9.82.
ramos_luna



Joined: 16 Oct 2015
Posts: 3

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PostPosted: Sat Oct 17, 2015 3:21 pm     Reply with quote
Obrigado pela dica (PCM programmer)!! estava uma bagunça meus fuses Embarassed

más o meu receptor IR ainda não esta recebendo os bytes do meu codigo !, acho que tem a ver com a modulação de 38kHZ que não esta gerando certo no pin c2
Obs: O meu recptor esta funcionando normal pois testei com um controle remoto ! porem o emissor que quero ainda não !

translate :

Thanks for the tip !! tava a mess my fuses Embarassed

bad my IR receiver is not yet receiving the bytes of my code! I think that has to do with the modulation of 38kHz that is not generating the right pin c2
Note: My recptor this normal functioning as tested with a remote control ! My recptor this normal functioning as tested with a remote control! but the sender that I want not !

Code:

#include <18f4550.h>

#fuses mclr
#fuses CPUDIV1
#fuses xt // LP,XT,HS,RC
#fuses put
#use delay(clock=4Mhz)
#define PIN_PWM   PIN_c1
#use rs232 (baud =9600, parity=n,xmit=pin_b2,rcv=pin_b1,bits=8,stream=blue)
#define IR_CODE_TV_ON   0x20DF10EF
#define IR_CODE_TV_Off  0x21DF20bF

#use fast_io(c)
boolean first;
void ir_send(int32 code);


void main()
{
set_tris_c(0xf9);
output_low(pin_c2);
   
   
    SETUP_CCP1(CCP_PWM);               
    SETUP_TIMER_2(T2_DIV_BY_1, 25,1);
    set_pwm1_duty(0);
   

   for (;;) {
   
       
         delay_ms(2000);     
         ir_send(IR_CODE_TV_ON);
   }
}

void ir_send(unsigned int32 code)
{
   unsigned char i = 0;
   
   // Envío el START
           
    set_pwm1_duty(13);
    delay_us(9000);
   
   set_pwm1_duty(0);
   delay_us(4500);

   // bit a bit código
   while (i < 32) {
     // #bit first = code.31
       first = bit_test(code,i);
       fprintf(blue,"%d\n",first);
       
      // Transmitir 1
      if (first) {
         
         set_pwm1_duty(13);
         delay_us(560);
       
         set_pwm1_duty(0);
         delay_us(1690);   
      }
     
      // Transmitir  0
      else {
     
         set_pwm1_duty(13);
         delay_us(560);   
         

         set_pwm1_duty(0);
         delay_us(560);   
      }
     
       
      i++;
   }
   
   // Bit de parada
     
   set_pwm1_duty(13);
   delay_us(560);     
   set_pwm1_duty(0);
}
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sat Oct 17, 2015 6:46 pm     Reply with quote
I don't think your IR sending function is correct. I think you are sending
the bits in the wrong order.

See this code:
https://github.com/z3t0/Arduino-IRremote/blob/master/ir_NEC.cpp
Their for() loop starts with the bitmask set to 0x80000000. Then they
shift the bitmask right by 1 bit, after each pass through the for() loop.
So they start at bit 31, and continue down to bit 0.

But your code starts with bit 0. I think that's wrong. You need to fix it.
ramos_luna



Joined: 16 Oct 2015
Posts: 3

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PostPosted: Sat Oct 17, 2015 11:26 pm     Reply with quote
Quote:
I don't think your IR sending function is correct

I had already noticed that. Too bad my biggest problem is to send the bit to my receiver. Follows the receiver code

it's OK:
Code:

#include <18f4550.h>
#fuses HS
#use delay(clock=20Mhz)
#define LCD_DB4   PIN_B4
#define LCD_DB5   PIN_B5
#define LCD_DB6   PIN_B6
#define LCD_DB7   PIN_B7
#define LCD_RS    PIN_B2
#define LCD_E     PIN_B3
#include <lcd1.c>

int1 BITS[32];
int16 Ta,Tb,TICK;
int8 n;
Int1 BIT_START, NUEVO_DATO;
int BYTE_IR[4];
int8 BIT_BYTE(int1 D7, int1 D6, int1 D5, int1 D4, int1 D3, int1 D2, int1 D1, int1 D0);

#int_EXT
void RB0(){
   Ta=get_timer1();
   TICK = Ta-tb;
   Tb = Ta;
 
   if(BIT_START==1){
       //BIT 1
       if(TICK>1350 && TICK < 1450)  // 1406.25
      {
         BITS[n]=1; n++;
      }
      //BIT 0
       if(TICK>650 && TICK < 750)  // TICK=700
      {
         BITS[n]=0; n++;
      }
      if(n==32){
         NUEVO_DATO=1;
      }
   
   }
   //BIT STAR
   if(TICK>8200 && TICK < 8600)  //8437 
   {
      BIT_START=1;
      n=0;
   }
}


void main(){
   
   lcd_init();
   SETUP_TIMER_1(T1_INTERNAL|T1_DIV_BY_8);
   EXT_INT_EDGE(0,H_TO_L); //
   enable_interrupts(INT_EXT);
   enable_interrupts(GLOBAL);
   lcd_gotoxy(1,1);
   lcd_putc(" Control IRr");
   
   while(TRUE){
     
      if(NUEVO_DATO==1){
         NUEVO_DATO=0;
         BYTE_IR[0]=BIT_BYTE(BITS[0],BITS[1],BITS[2],BITS[3],BITS[4],BITS[5],BITS[6],BITS[7]);
         BYTE_IR[1]=BIT_BYTE(BITS[8],BITS[9],BITS[10],BITS[11],BITS[12],BITS[13],BITS[14],BITS[15]);
         BYTE_IR[2]=BIT_BYTE(BITS[16],BITS[17],BITS[18],BITS[19],BITS[20],BITS[21],BITS[22],BITS[23]);
         BYTE_IR[3]=BIT_BYTE(BITS[24],BITS[25],BITS[26],BITS[27],BITS[28],BITS[29],BITS[30],BITS[31]);
         lcd_gotoxy(1,1);
         printf(lcd_putc,"B0=%X   B1=%X",BYTE_IR[0],BYTE_IR[1]);
         lcd_gotoxy(1,2);
         printf(lcd_putc,"B2=%X   B3=%X",BYTE_IR[2],BYTE_IR[3]);   
         //if(BYTE_IR[2]==0x45) output_d(0xFF);
         //if(BYTE_IR[2]==0x46) output_d(0x00);
      }
   }
}

int8 BIT_BYTE(int1 D0, int1 D1, int1 D2, int1 D3, int1 D4, int1 D5, int1 D6, int1 D7){
   int8 dato;
   dato= D7*128 + D6*64 + D5*32 + D4*16 + D3*8 + D2*4 + D1*2 +D0*1; // 0 al 255
   return dato;
}
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Oct 18, 2015 5:53 am     Reply with quote
Code:
#include <18f4550.h>
#fuses HS
#use delay(clock=20Mhz)
#define LCD_DB4   PIN_B4
#define LCD_DB5   PIN_B5
#define LCD_DB6   PIN_B6
#define LCD_DB7   PIN_B7
#define LCD_RS    PIN_B2
#define LCD_E     PIN_B3

You are missing CPUDIV1 again. The compiler defaults to using CPUDIV4.
So your PIC is really running at 5 MHz, not 20 MHz as you think.
Attention to detail is one of the most important things in electronics.
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