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unsigned int find_code(unsigned int x)
{
    unsigned int bits[16] = { 0xf , 0xa , 0x7 ,0xe,
                              0xf ,0xd ,0x9 ,0x1,
                              0x1 ,0x2 ,0x4 ,0x8,
                              0x3 ,0x6 ,0xc ,0xb };
    unsigned int bit = 1;
    unsigned int res = 0x5;
    int i;
    unsigned int lo,hi;

    if ((x&0x3)==3) {
        lo = x & 0x00ff;
        hi = x & 0xff00;
        lo += 4;
        if (lo>0x100) lo = 0x12;
        x = lo | hi;
    }

    for(i=0;i<16;i++) {
        if (x&bit) {
            res = res ^ bits[i];
        }
        bit = bit << 1;
    }

    return res;
}

Code: Select all

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>

unsigned int find_code(unsigned int x)
{
    unsigned int bits[16] = { 0xf ,0xa ,0x7 ,0xe,
                              0xf ,0xd ,0x9 ,0x1,
                              0x1 ,0x2 ,0x4 ,0x8,
                              0x3 ,0x6 ,0xc ,0xb };
    unsigned int bit = 1;
    unsigned int res = 0x5;
    int i;
    unsigned int lo,hi;

    if ((x&0x3)==3) {
        lo = x & 0x00ff;
        hi = x & 0xff00;
        lo += 4;
        if (lo>0x100) lo = 0x12;
        x = lo | hi;
    }

    for(i=0;i<16;i++) {
        if (x&bit) {
            res = res ^ bits[i];
        }
        bit = bit << 1;
    }

    return res;
}

void transmit( unsigned int device, unsigned int check, unsigned int val )
{
   const char ssss = 85;
   const char sssl = 84; // 0
   const char slss = 69; // 1

   const char bits[2] = {sssl,slss};
   int i;

   char txStr[100];


   char preamble[] = {'R', 5, 'T', 114,60,1,1,105,ssss,ssss};
   memcpy(txStr, preamble, sizeof(preamble));
   size_t pos = sizeof(preamble);

   for(i=15;i>=0;i--) txStr[pos++]=bits[(device>>i)&0x01];
   for(i=3;i>=0;i--) txStr[pos++]=bits[(check>>i)&0x01];
   for(i=3;i>=0;i--) txStr[pos++]=bits[(val>>i)&0x01];

   txStr[pos++] = ssss;
   txStr[pos++] = '+';
   txStr[pos++] = 0;

   FILE* fpipe = popen("tdtool --raw -", "w");

   if (fpipe==NULL) {
       printf("Problem with pipe.\n");
   } else {
       /* printf("%s", txStr); */
       fprintf(fpipe, "%s", txStr);
       fclose(fpipe);
   }
}


int main( int argc, char **argv )
{
    unsigned int device = 0;
    unsigned int check = 0;
    unsigned int mask = 0;
    unsigned int invmask;
    unsigned int val;
    int i;
    int pause = 0;

    if (argc<3) {
        printf("Usage: %s device(hex) value(decimal)\n", argv[0]);
        printf("  device id is 4 hex digits\n");
        printf("  value is 0-15, where 0=off, 15=on and 10=learn\n");
        exit(0);
    }

    sscanf(argv[1],"%x",&device);
    sscanf(argv[2],"%i",&val);
    check = find_code(device);
    transmit(device,check,val);
    
    exit(0);
}