trying to contact Mark

[Guest]

Here is the latest version ...

[Guest]

Mark,

My mistake, the code works.

Thanks, Garrett

[marquez]

Hi
I would like to make a dmx pic16f767 receiver. I only would like to read the 3 first channels.
I read them ok but not always. Anyone knows why?
this is my code:


#fuses HS,NOWDT

#include <16F767.h>
#use delay(clock=16000000)
#include <string.h>
#include<lcd16.c>
#include <stdio.h>

#define BUFFER_SIZE 6
BYTE buffer[BUFFER_SIZE];
BYTE next_in = 0;
BYTE next_out = 0; //antes 0

#use rs232(baud=250000,bits=9, xmit=PIN_C6, rcv=PIN_C7)

struct PA_pin_map {
boolean unusedRA0; //bit 0
boolean unusedRA1;
boolean unusedRA2;
boolean unusedRA3;
boolean unusedRA4;
boolean unusedRA5; //bit 4
} Puerto_A;
#byte Puerto_A = 5

struct PB_pin_map {
boolean unusedRB0; //bit 0
boolean unusedRB1;
boolean unusedRB2;
boolean unusedRB3;
boolean unusedRB4;
boolean unusedRB5;
boolean unusedRB6;
boolean unusedRB7; //bit8
} Puerto_B;
#byte Puerto_B = 6

struct PC_pin_map {
boolean unusedRC0; //bit 0
boolean unusedRC1;
boolean unusedRC2;
boolean unusedRC3;
boolean unusedRC4;
boolean test_osc;
boolean unusedRC6;
boolean unusedRC7; //bit8
} Puerto_C;
#byte Puerto_C = 7

//// Declaracion de funciones ////
//////////////////////////////////////
void clear_lcd();


//// Rutina de interrupcion de la usart
#int_rda
void serial_isr() {
int t;
Puerto_C.test_osc=1;
buffer[next_in]=getc();
t=next_in;
next_in=(next_in+1) % BUFFER_SIZE;
if(next_in==next_out)
{
next_in=t; // Buffer full !!
}
Puerto_C.test_osc=0;
}

#define bkbhit (next_in!=next_out)


BYTE bgetc() {
BYTE c;
while(!bkbhit) ;
c=buffer[next_out];
next_out=(next_out+1) % BUFFER_SIZE;
return(c);
}


void main() {

BYTE kk;
BYTE chan1;
BYTE chan2;
BYTE chan3;

//Inicializacion del display y mensaje de bienvenida
lcd_init();
clear_lcd();
delay_ms(1000);

lcd_putc(" welcome\n");
lcd_putc(" Comienzo secuencia\n");
delay_ms(1000);
clear_lcd();

///////////////////////////////////////////////////

lcd_putc("waiting..\n");
delay_ms(15000);
clear_lcd();


enable_interrupts(global);
enable_interrupts(int_rda);
while(1)
{
//inicializamos los tres canales
chan1=0;
chan2=0;
chan3=0;
///////////////////////////////////////////////////
delay_ms(2000); //antes de 2000ms
lcd_putc("canales 1,2,3=>\n");

if ( bkbhit) //Comprobamos que el buffer no este lleno
{
kk=bgetc(); //El primer byte es el break
}
if ( bkbhit)
{
kk=bgetc(); //El segundo byte es el start
}
if ( bkbhit)
{
chan1=bgetc();
}
if ( bkbhit)
{
chan2=bgetc();
}
if ( bkbhit)
{
chan3=bgetc();
}

lcd_putc(chan1);
lcd_putc(chan2);
lcd_putc(chan3);
delay_ms(1000);
clear_lcd();
}


}

void clear_lcd()
{
lcd_putc("\f");
}

thanks!

[Mark]

Yeah, I don't see you starting after the mark or "break" signal. Kindly use the code button when posting code. It makes it difficult to read otherwise and some people aren't going to waste time trying to scan the code. I already posted proven working DMX code. Versions of it have been in our products for the past 5 years. I suggest you start with it.

[marquez]

[Mark]

Go here http://www.ccsinfo.com/forum/viewtopic.php?t=21092&postdays=0&postorder=asc&start=15 and look at the dmx_rcv() function. That would be your #int_rda handler.

[Guest]