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 <stdint.h>
  11 #include <unistd.h>
  12 #include <stdio.h>
  13
  14 typedef uint8_t BYTE;
  15
  16 main(int argc, char **argv)
  17 {
  18        BYTE    opcode[4];
  19        int     fd;
  20        int     addr = 0;
  21        ssize_t s;
  22
  23 // Check the user has given us an input file.
  24        if(argc < 2)
  25        {
  26                printf("Usage: %s <binary_file>\n\n", argv[0]);
  27                return 1;
  28        }
  29
  30 // Open the input file.
  31        fd = open(argv[1], 0);
  32        if(fd == -1)
  33        {
  34                perror("File Open");
  35                return 2;
  36        }
  37
  38        while(1)
  39        {
  40        // Read 32 bits.
  41                s = read(fd, opcode, 4);
  42                if(s == -1)
  43                {
  44                        perror("File read");
  45                        return 3;
  46                }
  47
  48                if(s == 0)
  49                        break; // End of file.
  50
  51        // Output to STDOUT.
  52                printf("%6d => x\"%02x%02x%02x%02x\",\n",
  53                       addr++, opcode[0], opcode[1],
  54                       opcode[2], opcode[3]);
  55        }
  56
  57        close(fd);
  58        return 0;
  59 }
  60