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Use Mbed for generate DMX

Topic last updated 18 Apr 2011, by Sensovery Company. 0 replies
Sensovery Company
18 Apr 2011

Hello,

I want create a class for Generate a DMX signal. So i have write that :

#include "mbed.h"
#include "DMX.h"


DMX :: DMX(PinName Tx) : _Tx(Tx){}
    
void DMX :: Init(){
       _Tx= 0;
       wait_us(1000);
    }
    
int * DMX :: intToBin(int nb){
    int x=0, tab[8];
    for(x = 0 ; nb > 0; x++){
        tab[x] = nb % 2;
        nb /=2;
        }
    int * binaire = new int[8];
    for(int i = 0; i<8; i++)
        binaire[i] = 0;
    for(int i = 0 ; i <= x ; i++)
        binaire[i] = tab[x-i];
    return binaire ;
    }
    
void DMX :: raz(){
    int * infos = new int[512];
    for(int i = 0; i< 512; i++)
        infos[i] = 0;
    setInfos(infos);
    }

void DMX :: setInfos( int * infos){
    Init();
    _Tx=1; // MAB
    wait_us(8);
    for(int j = 0; j < 255 ; j++){
        _Tx=0; // Start bit
        wait_us(4);
        //int * tmp = intToBin(infos[j]);
        for(int i = 0 ; i < 8 ; i++){ // DATA
            _Tx= tmp[i];
            wait_us(4);
            }
        _Tx = 1; // Stop Bit
        wait_us(8);
       }
      _Tx = 1; // Repos
    }

I have a DMX recepteur with LED RGB but there no detect my signal. My main is that :

#include "mbed.h"
#include "DMX.h"


DMX dmx(p9);

int main(){
   int * tab = new int[512];
   for(int i = 0; i < 512; i++)
        tab[i] = 0;
   for(int i = 2; i < 512; i=i+6)
       tab[i] = 255;
   wait(1);
   dmx.raz();
    while(1) {
        dmx.setInfos(tab);
        }
    }

Can you help me please ?