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moneeb
Joined: 05 Jun 2013
Posts: 3
Location: pakistan
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| sirc ir receiver |
 Posted: Wed Jun 05, 2013 3:41 am |
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hi
m building a multi channal remote control using sirc 12 bit protocol.... doing every thing right but m not able to get the result :/
m posting my code below plz give it a look
| Code: | #include <16f877A.h>
#fuses HS,NOWDT,NOCPD,NOPROTECT,PUT,NOBROWNOUT
#use delay(clock=4M)
//------------------------------------------------------------------------------
#use fast_io(A)
#use fast_io(B)
#zero_ram
//-----------------------------------------------------------------------------------
#define one_min 1450 //no of counts to safely detect bit1
#define one_max 2200 //optimal @4 MHz is 1800
#define zero_min 600 //no of counts to safely detect bit0
#define zero_max 1440 //optimal @4 MHz is 1200
#byte portb=0x06
#byte portc=0x07
#byte portd=0x08
#bit led_4=portb.4
#bit led_5=portb.5
#byte PIR1=0x0c
#bit ccp1f=PIR1.2
int16 fall; // variable to save the period of space
int16 rec[12]={0,0,0,0,0,0,0,0,0,0,0,0}; // array to save the received code
int16 code1[12]={0,0,0,0,0,0,0,1,0,0,0,0};
int16 code2[12]={1,0,0,0,0,0,0,1,0,0,0,0};
int16 code3[12]={0,1,0,0,0,0,0,1,0,0,0,0};
int16 code4[12]={1,1,0,0,0,0,0,1,0,0,0,0};
int16 code5[12]={0,0,1,0,0,0,0,1,0,0,0,0};
int one=0,zero=0,start=0;
int ledz,ledo;
int i=0,n;
int8 but1=0;
int8 but2=0;
int8 but3=0;
int8 but4=0;
int8 but5=0;
#int_ccp1 // interrept of falling edge
void ccp1_int() // start the interrept rountain
{
fall=ccp_1;
setup_timer_1(t1_disabled);
// if ((start_max>fall)&&(fall<start_min))
// {
// start+=1;
// }
if((fall<zero_max)&&(fall>zero_min))
{
zero+=1;
ledz=1;
}
if((one_max>fall)&&(fall>one_min))
{
one+=1;
ledo=1;
}
///////////////////////////////////////////recording values/////////////////////////////////////////////////
if((zero==1)||(one==1)) // if one or zero received, save it in rec array
{
if(zero==1)
{
rec[i]=0;
i++;
zero=0;
}
if(one==1)
{
rec[i]=1;
i++;
one=0;
}
}
///////////////////////////////////////////checking of codes///////////////////////////////////////////////
if (i==12)
{
start=0;
i=0;
for(n=0;n<=11;n++)
{
if (code1[n]== rec[n])
{
but1++;
}
if (code2[n]== rec[n])
{
but2++;
}
if (code3[n]== rec[n])
{
but3++;
}
if (code4[n]== rec[n])
{
but4++;
}
if (code5[n]== rec[n])
{
but5++;
}
}
}
/////////////////////////////////////making corrosponding outputs//////////////////////////////
//
//
//////////////////////////////////////// button 1 conditions///////////////////////////////////
if (but1==12)
{
output_high(PIN_D0);
}
//////////////////////////////////////// button 2 conditions///////////////////////////////////
if (but2==12)
{
output_high(PIN_D1);
}
//////////////////////////////////////// button 3 conditions///////////////////////////////////
if (but3==12)
{
output_high(PIN_D2);
}
//////////////////////////////////////// button 4 conditions///////////////////////////////////
if (but4==12)
{
if (led_4==1)
output_low(PIN_B0);
else
output_high(PIN_B0);
}
//////////////////////////////////////// button 5 conditions///////////////////////////////////
if (but5==12)
{
if(led_5==1)
output_low(PIN_B1);
else
output_high(PIN_B1);
}
but1=0;
but2=0;
but3=0;
but4=0;
but5=0;
goto again;
again:
ccp1f=0;
set_timer1(0);
fall=0;
}
void main()
{
set_tris_b(0x00); //set portb as output
set_tris_d(0x00); //set portb as output
set_tris_c(0x0f); // set 4-portc as input
portb=0x00;
portd=0x00;
portc=0x00;
ledz=0;
ledo=0;
set_timer1(0);
while(1)
{
setup_ccp1(ccp_capture_fe); // capture the Rising edge
ext_int_edge( H_TO_L );
setup_timer_1(t1_div_by_1); // start timer1
clear_interrupt(int_ccp1);
enable_interrupts(int_ccp1);
enable_interrupts(global);
}
}
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Mike Walne
Joined: 19 Feb 2004
Posts: 1785
Location: Boston Spa UK
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| Posted: Wed Jun 05, 2013 7:07 am |
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Reduce your code to something like 10 lines which illustrate the problem.
Also tell what is wrong, and you may get some help.
I can't even start.
Mike |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19381
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| Posted: Wed Jun 05, 2013 7:18 am |
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Obvious comment, without looking very far, you don't want to be doing almost (if any) of the instructions you have in your 'main' loop, in a loop. Most have side effects (for instance setting up the timer1 prescaler clears it at the same time), so they will prevent the interrupt code for having any hope of working.
ext_int_edge, does nothing since you are not using int_ext.
Once the ccp edge is set, it remains set.
You don't want to be clearing the interrupt in the loop.
etc. etc... |
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moneeb
Joined: 05 Jun 2013
Posts: 3
Location: pakistan
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| Posted: Thu Jun 06, 2013 5:59 am |
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ok..
i think i am getting some trouble in defining the time periods or calling of the interrupt and also in the main program..
| Code: | #include <16f877A.h>
#fuses HS,NOWDT,NOCPD,NOPROTECT,PUT,NOBROWNOUT
#use delay(clock=4M)
//------------------------------------------------------------------------------
#use fast_io(A)
#use fast_io(B)
#zero_ram
//-----------------------------------------------------------------------------------
#define one_min 1450 //no of counts to safely detect bit1
#define one_max 2200 //optimal @4 MHz is 1800
#define zero_min 600 //no of counts to safely detect bit0
#define zero_max 1440 //optimal @4 MHz is 1200
|
and in this isr routine
| Code: | #int_ccp1 // interrept of falling edge
void ccp1_int() // start the interrept rountain
{
fall=ccp_1;
setup_timer_1(t1_disabled);
if ((start_max>fall)&&(fall<start_min))
{
start+=1;
}
if((fall<zero_max)&&(fall>zero_min))
{
zero+=1;
ledz=1;
}
if((one_max>fall)&&(fall>one_min))
{
one+=1;
ledo=1;
}
///////////////////////////////////////////recording values/////////////////////////////////////////////////
if(((zero==1)||(one==1))&&(start=1)) // if one or zero received, save it in rec array
{
if(zero==1)
{
rec[i]=0;
i++;
zero=0;
}
if(one==1)
{
rec[i]=1;
i++;
one=0;
}
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temtronic
Joined: 01 Jul 2010
Posts: 9177
Location: Greensville,Ontario
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| Posted: Thu Jun 06, 2013 6:05 am |
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I googled 'sirc 12 bit protocol' and the 4th hit is right here in this forum !
Working code,so author says,
I'd looked at it, see how close it is to what you require.There may be some timing issues, but should really help you with your project.
hth
jay |
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moneeb
Joined: 05 Jun 2013
Posts: 3
Location: pakistan
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| Posted: Thu Jun 06, 2013 7:06 am |
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| i also think that the problem lies with in the timing issue :/ |
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