src/parse.py

   1 import math
   2
   3
   4 def missing_numbers(num_list):
   5     original_list = [x for x in range(num_list[0], num_list[-1] + 1)]
   6     num_list = set(num_list)
   7     return (list(num_list ^ set(original_list)))
   8
   9
  10 class Parse(object):
  11     # == Parameters == #
  12     N_MUX = 1           # number of selection lines for the mux per io
  13     N_IO = 0
  14     N_MUX_IO = 0
  15     Addressing = 'WORD'
  16     ADDR_WIDTH = 32
  17     DATA_WIDTH = 32
  18     # ================ #
  19
  20     # Generating the number of bits for memory map #
  21     lower_offset = 0
  22     if Addressing == 'BYTE':
  23         lower_offset = 0
  24     elif Addressing == 'HWORD':
  25         lower_offset = 1
  26     elif Addressing == 'WORD':
  27         lower_offset = 2
  28     elif Addressing == 'DWORD':
  29         lower_offset = 3
  30     else:
  31         print('ERROR: Addressing should be one of: BYTE, HWORD, WORD, DWORD')
  32         exit(1)
  33
  34     # == capture the number of IO cells required == #
  35     pinmapfile = open('pinmap.txt', 'r')
  36     max_io = 0
  37     muxed_cells = []
  38     dedicated_cells = []
  39     pinnumbers = []
  40
  41     for lineno, line in enumerate(pinmapfile):
  42         line1 = line.split()
  43         if len(line1) <= 1:
  44             continue
  45         pinnumbers.append(int(line1[0]))
  46         if len(line1) == 2:  # dedicated
  47             dedicated_cells.append(line1)
  48         else:
  49             muxed_cells.append(line1)
  50
  51     pinnumbers = sorted(pinnumbers)
  52     upper_offset = lower_offset + int(math.log(len(muxed_cells), 2))
  53
  54     # ============================================= #
  55     # ======= Multiple checks to see if the user has not screwed ======#
  56     missing_pins = missing_numbers(pinnumbers)
  57
  58     # Check-1: ensure that no pin is present in both muxed and dedicated pins
  59     for muxcell in muxed_cells:
  60         for dedcel in dedicated_cells:
  61             if(dedcel[1] in muxcell):
  62                 print("ERROR: " + str(dedcel[1]) + " present \
  63                                       in dedicated & muxed lists")
  64                 exit(1)
  65
  66     # Check-2: if pin numbering is consistent:
  67     if missing_pins:
  68         print("ERROR: Following pins have no assignment: " +
  69               str(missing_numbers(pinnumbers)))
  70         exit(1)
  71     unique = set(pinnumbers)
  72     duplicate = False
  73     for each in unique:
  74         count = pinnumbers.count(each)
  75         if(count > 1):
  76             print("ERROR: Multiple assignment for pin: " + str(each))
  77             duplicate = True
  78     if duplicate:
  79         exit(1)
  80
  81     # Check-2: confirm if N_* matches the instances in the pinmap
  82     # ============================================================== #
  83
  84     # == user info after parsin ================= #
  85     N_IO = len(dedicated_cells) + len(muxed_cells)
  86     print("Max number of IO: " + str(N_IO))
  87     print("Muxed IOs: " + str(len(muxed_cells)))
  88     print("Dedicated IOs: " + str(len(dedicated_cells)))
  89     # ============================================ #
  90
  91
  92 if __name__ == '__main__':
  93     p = Parse()
  94     print p.N_IO