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/*

 * mkinit.c -- generate Verilog defparam statements from C data

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#define LO_FILE_NAME    "chrgenlo.init"

#define HI_FILE_NAME    "chrgenhi.init"

unsigned char data[] = {

  #include "font-8x16"

};

unsigned char reflect(unsigned char c) {

  unsigned char r;

  int i;

  r = 0;

  for (i = 0; i < 8; i++) {

    r <<= 1;

    if (c & 1) {

      r |= 1;

    }

    c >>= 1;

  }

  return r;

}

int main(void) {

  FILE *outFile;

  int i, j;

  unsigned char b[32];

  if (sizeof(data) != 256 * 16) {

    printf("Error: wrong size of data\n");

    exit(1);

  }

  outFile = fopen(LO_FILE_NAME, "w");

  if (outFile == NULL) {

    printf("Error: cannot open file '%s'\n", LO_FILE_NAME);

    exit(1);

  }

  for (i = 0; i < 64; i++) {

    fprintf(outFile, "  defparam character_rom_lo.INIT_%02X = 256'h", i);

    for (j = 0; j < 32; j++) {

      b[j] = data[i * 32 + j + 0 * 16];

    }

    for (j = 31; j >= 0; j--) {

      fprintf(outFile, "%02X", reflect(b[j]));

    }

    fprintf(outFile, ";\n");

  }

  fclose(outFile);

  outFile = fopen(HI_FILE_NAME, "w");

  if (outFile == NULL) {

    printf("Error: cannot open file '%s'\n", HI_FILE_NAME);

    exit(1);

  }

  for (i = 0; i < 64; i++) {

    fprintf(outFile, "  defparam character_rom_hi.INIT_%02X = 256'h", i);

    for (j = 0; j < 32; j++) {

      b[j] = data[i * 32 + j + 128 * 16];

    }

    for (j = 31; j >= 0; j--) {

      fprintf(outFile, "%02X", reflect(b[j]));

    }

    fprintf(outFile, ";\n");

  }

  fclose(outFile);

  return 0;

}