zpu/hdl/example/zpuromgen.c

   1 // zpuromgen.c
   2 //
   3 // Program to turn a binary file into a VHDL lookup table.
   4 //   by Adam Pierce
   5 //   29-Feb-2008
   6 //
   7 // This software is free to use by anyone for any purpose.
   8 //
   9
  10 #include <unistd.h>
  11 #include <stdio.h>
  12
  13 typedef uint8_t BYTE;
  14
  15 main(int argc, char **argv)
  16 {
  17        BYTE    opcode[4];
  18        int     fd;
  19        int     addr = 0;
  20        ssize_t s;
  21
  22 // Check the user has given us an input file.
  23        if(argc < 2)
  24        {
  25                printf("Usage: %s <binary_file>\n\n", argv[0]);
  26                return 1;
  27        }
  28
  29 // Open the input file.
  30        fd = open(argv[1], 0);
  31        if(fd == -1)
  32        {
  33                perror("File Open");
  34                return 2;
  35        }
  36
  37        while(1)
  38        {
  39        // Read 32 bits.
  40                s = read(fd, opcode, 4);
  41                if(s == -1)
  42                {
  43                        perror("File read");
  44                        return 3;
  45                }
  46
  47                if(s == 0)
  48                        break; // End of file.
  49
  50        // Output to STDOUT.
  51                printf("%6d => x\"%02x%02x%02x%02x\",\n",
  52                       addr++, opcode[0], opcode[1],
  53                       opcode[2], opcode[3]);
  54        }
  55
  56        close(fd);
  57        return 0;
  58 }
  59