config_gram.y

AVR的USB文件

  K_RESET | K_SCK
;

part_parm :
  K_ID TKN_EQUAL TKN_STRING 
    {
      strncpy(current_part->id, $3->value.string, AVR_IDLEN);
      current_part->id[AVR_IDLEN-1] = 0;
      free_token($3);
    } |

  K_DESC TKN_EQUAL TKN_STRING 
    {
      strncpy(current_part->desc, $3->value.string, AVR_DESCLEN);
      current_part->desc[AVR_DESCLEN-1] = 0;
      free_token($3);
    } |

  K_DEVICECODE TKN_EQUAL TKN_NUMBER {
    {
      current_part->devicecode = $3->value.number;
      free_token($3);
    }
  } |

  K_CHIP_ERASE_DELAY TKN_EQUAL TKN_NUMBER
    {
      current_part->chip_erase_delay = $3->value.number;
      free_token($3);
    } |

  K_PAGEL TKN_EQUAL TKN_NUMBER
    {
      current_part->pagel = $3->value.number;
      free_token($3);
    } |

  K_BS2 TKN_EQUAL TKN_NUMBER
    {
      current_part->bs2 = $3->value.number;
      free_token($3);
    } |

  K_RESET TKN_EQUAL reset_disposition
    {
      if ($3->primary == K_DEDICATED)
        current_part->reset_disposition = RESET_DEDICATED;
      else if ($3->primary == K_IO)
        current_part->reset_disposition = RESET_IO;

      free_tokens(2, $1, $3);
    } |

  K_SERIAL TKN_EQUAL yesno
    {
      if ($3->primary == K_YES)
        current_part->flags |= AVRPART_SERIALOK;
      else if ($3->primary == K_NO)
        current_part->flags &= ~AVRPART_SERIALOK;

      free_token($3);
    } |

  K_PARALLEL TKN_EQUAL parallel_modes
    {
      if ($3->primary == K_YES) {
        current_part->flags |= AVRPART_PARALLELOK;
        current_part->flags &= ~AVRPART_PSEUDOPARALLEL;
      }
      else if ($3->primary == K_NO) {
        current_part->flags &= ~AVRPART_PARALLELOK;
        current_part->flags &= ~AVRPART_PSEUDOPARALLEL;
      }
      else if ($3->primary == K_PSEUDO) {
        current_part->flags |= AVRPART_PARALLELOK;
        current_part->flags |= AVRPART_PSEUDOPARALLEL;
      }


      free_token($3);
    } |

  K_RETRY_PULSE TKN_EQUAL retry_lines
    {
      switch ($3->primary) {
        case K_RESET :
          current_part->retry_pulse = PIN_AVR_RESET;
          break;
        case K_SCK :
          current_part->retry_pulse = PIN_AVR_SCK;
          break;
      }

      free_token($1);
    } |


/*
  K_EEPROM { current_mem = AVR_M_EEPROM; }
    mem_specs |

  K_FLASH { current_mem = AVR_M_FLASH; }
    mem_specs | 
*/

  K_MEMORY TKN_STRING 
    { 
      current_mem = avr_new_memtype(); 
      strcpy(current_mem->desc, strdup($2->value.string)); 
      free_token($2); 
    } 
    mem_specs 
    { 
      ladd(current_part->mem, current_mem); 
      current_mem = NULL; 
    } |

  opcode TKN_EQUAL string_list {
    { 
      int opnum;
      OPCODE * op;

      opnum = which_opcode($1);
      op = avr_new_opcode();
      parse_cmdbits(op);
      current_part->op[opnum] = op;

      free_token($1);
    }
  }
;


yesno :
  K_YES | K_NO
;


mem_specs :
  mem_spec TKN_SEMI |
  mem_specs mem_spec TKN_SEMI
;


mem_spec :
  K_PAGED          TKN_EQUAL yesno
    {
      current_mem->paged = $3->primary == K_YES ? 1 : 0;
      free_token($3);
    } |

  K_SIZE            TKN_EQUAL TKN_NUMBER
    {
      current_mem->size = $3->value.number;
      free_token($3);
    } |


  K_PAGE_SIZE       TKN_EQUAL TKN_NUMBER
    {
      current_mem->page_size = $3->value.number;
      free_token($3);
    } |

  K_NUM_PAGES       TKN_EQUAL TKN_NUMBER
    {
      current_mem->num_pages = $3->value.number;
      free_token($3);
    } |

  K_MIN_WRITE_DELAY TKN_EQUAL TKN_NUMBER
    {
      current_mem->min_write_delay = $3->value.number;
      free_token($3);
    } |

  K_MAX_WRITE_DELAY TKN_EQUAL TKN_NUMBER
    {
      current_mem->max_write_delay = $3->value.number;
      free_token($3);
    } |

  K_PWROFF_AFTER_WRITE TKN_EQUAL yesno
    {
      current_mem->pwroff_after_write = $3->primary == K_YES ? 1 : 0;
      free_token($3);
    } |

  K_READBACK_P1     TKN_EQUAL TKN_NUMBER
    {
      current_mem->readback[0] = $3->value.number;
      free_token($3);
    } |

  K_READBACK_P2     TKN_EQUAL TKN_NUMBER
    {
      current_mem->readback[1] = $3->value.number;
      free_token($3);
    } |

  opcode TKN_EQUAL string_list {
    { 
      int opnum;
      OPCODE * op;

      opnum = which_opcode($1);
      op = avr_new_opcode();
      parse_cmdbits(op);
      current_mem->op[opnum] = op;

      free_token($1);
    }
  }
;


%%

#if 0
static char * vtypestr(int type)
{
  switch (type) {
    case V_NUM : return "NUMERIC";
    case V_STR : return "STRING";
    default:
      return "<UNKNOWN>";
  }
}
#endif


static int assign_pin(int pinno, TOKEN * v)
{
  int value;

  value = v->value.number;

  if ((value <= 0) || (value >= 18)) {
    fprintf(stderr, 
            "%s: error at line %d of %s: pin must be in the "
            "range 1-17\n",
            progname, lineno, infile);
    exit(1);
  }

  current_prog->pinno[pinno] = value;

  return 0;
}


static int which_opcode(TOKEN * opcode)
{
  switch (opcode->primary) {
    case K_READ        : return AVR_OP_READ; break;
    case K_WRITE       : return AVR_OP_WRITE; break;
    case K_READ_LO     : return AVR_OP_READ_LO; break;
    case K_READ_HI     : return AVR_OP_READ_HI; break;
    case K_WRITE_LO    : return AVR_OP_WRITE_LO; break;
    case K_WRITE_HI    : return AVR_OP_WRITE_HI; break;
    case K_LOADPAGE_LO : return AVR_OP_LOADPAGE_LO; break;
    case K_LOADPAGE_HI : return AVR_OP_LOADPAGE_HI; break;
    case K_WRITEPAGE   : return AVR_OP_WRITEPAGE; break;
    case K_CHIP_ERASE  : return AVR_OP_CHIP_ERASE; break;
    case K_PGM_ENABLE  : return AVR_OP_PGM_ENABLE; break;
    default :
      fprintf(stderr, 
              "%s: error at %s:%d: invalid opcode\n",
              progname, infile, lineno);
      exit(1);
      break;
  }
}


static int parse_cmdbits(OPCODE * op)
{
  TOKEN * t;
  int bitno;
  char ch;
  char * e;
  char * q;
  int len;
  char * s, *brkt;

  bitno = 32;
  while (lsize(string_list)) {

    t = lrmv_n(string_list, 1);

    s = strtok_r(t->value.string, " ", &brkt);
    while (s != NULL) {

      bitno--;
      if (bitno < 0) {
        fprintf(stderr, 
                "%s: error at %s:%d: too many opcode bits for instruction\n",
                progname, infile, lineno);
        exit(1);
      }

      len = strlen(s);

      if (len == 0) {
        fprintf(stderr, 
                "%s: error at %s:%d: invalid bit specifier \"\"\n",
                progname, infile, lineno);
        exit(1);
      }

      ch = s[0];

      if (len == 1) {
        switch (ch) {
          case '1':
            op->bit[bitno].type  = AVR_CMDBIT_VALUE;
            op->bit[bitno].value = 1;
            op->bit[bitno].bitno = bitno % 8;
            break;
          case '0':
            op->bit[bitno].type  = AVR_CMDBIT_VALUE;
            op->bit[bitno].value = 0;
            op->bit[bitno].bitno = bitno % 8;
            break;
          case 'x':
            op->bit[bitno].type  = AVR_CMDBIT_IGNORE;
            op->bit[bitno].value = 0;
            op->bit[bitno].bitno = bitno % 8;
            break;
          case 'a':
            op->bit[bitno].type  = AVR_CMDBIT_ADDRESS;
            op->bit[bitno].value = 0;
            op->bit[bitno].bitno = 8*(bitno/8) + bitno % 8;
            break;
          case 'i':
            op->bit[bitno].type  = AVR_CMDBIT_INPUT;
            op->bit[bitno].value = 0;
            op->bit[bitno].bitno = bitno % 8;
            break;
          case 'o':
            op->bit[bitno].type  = AVR_CMDBIT_OUTPUT;
            op->bit[bitno].value = 0;
            op->bit[bitno].bitno = bitno % 8;
            break;
          default :
            fprintf(stderr, 
                    "%s: error at %s:%d: invalid bit specifier '%c'\n",
                    progname, infile, lineno, ch);
            exit(1);
            break;
        }
      }
      else {
        if (ch == 'a') {
          q = &s[1];
          op->bit[bitno].bitno = strtol(q, &e, 0);
          if ((e == q)||(*e != 0)) {
            fprintf(stderr, 
                    "%s: error at %s:%d: can't parse bit number from \"%s\"\n",
                    progname, infile, lineno, q);
            exit(1);
          }
          op->bit[bitno].type = AVR_CMDBIT_ADDRESS;
          op->bit[bitno].value = 0;
        }
        else {
          fprintf(stderr, 
                  "%s: error at %s:%d: invalid bit specifier \"%s\"\n",
                  progname, infile, lineno, s);
          exit(1);
        }
      }

      s = strtok_r(NULL, " ", &brkt);
    }

    free_token(t);

  }  /* while */

  return 0;
}