src/parse.py

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