src/parse.py

   1 import math
   2 import os.path
   3
   4
   5 def missing_numbers(num_list):
   6     original_list = [x for x in range(num_list[0], num_list[-1] + 1)]
   7     num_list = set(num_list)
   8     return (list(num_list ^ set(original_list)))
   9
  10
  11 class Parse(object):
  12     # == Parameters == #
  13     N_MUX = 1           # number of selection lines for the mux per io
  14     N_IO = 0
  15     N_MUX_IO = 0
  16     Addressing = 'WORD'
  17     ADDR_WIDTH = 32
  18     DATA_WIDTH = 32
  19     # ================ #
  20
  21     # Generating the number of bits for memory map #
  22     lower_offset = 0
  23     if Addressing == 'BYTE':
  24         lower_offset = 0
  25     elif Addressing == 'HWORD':
  26         lower_offset = 1
  27     elif Addressing == 'WORD':
  28         lower_offset = 2
  29     elif Addressing == 'DWORD':
  30         lower_offset = 3
  31     else:
  32         print('ERROR: Addressing should be one of: BYTE, HWORD, WORD, DWORD')
  33         exit(1)
  34
  35     def __init__(self, pth=None, verify=True):
  36
  37         max_io = 0
  38         self.muxed_cells = []
  39         self.dedicated_cells = []
  40         self.pinnumbers = []
  41
  42         # == capture the number of IO cells required == #
  43         fname = 'pinmap.txt'
  44         if pth:
  45             fname = os.path.join(pth, fname)
  46         with open(fname) as pinmapfile:
  47             for lineno, line in enumerate(pinmapfile):
  48                 line1 = line[:-1].split('\t')
  49                 if len(line1) <= 1:
  50                     continue
  51                 self.pinnumbers.append(int(line1[0]))
  52                 if len(line1) == 2:  # dedicated
  53                     self.dedicated_cells.append(line1)
  54                 else:
  55                     self.muxed_cells.append(line1)
  56
  57         self.pinnumbers = sorted(self.pinnumbers)
  58         self.upper_offset = self.lower_offset + \
  59             int(math.log(len(self.muxed_cells), 2))
  60
  61         if verify:
  62             self.do_checks()
  63
  64         self.cell_bitwidth = self.get_cell_bit_width()
  65
  66         # == user info after parsing ================= #
  67         self.N_IO = len(self.dedicated_cells) + len(self.muxed_cells)
  68         print("Max number of IO: " + str(self.N_IO))
  69         print("Muxer bit width: " + str(self.cell_bitwidth))
  70         print("Muxed IOs: " + str(len(self.muxed_cells)))
  71         print("Dedicated IOs: " + str(len(self.dedicated_cells)))
  72
  73     def do_checks(self):
  74         """ Multiple checks to see if the user has not screwed up
  75         """
  76         missing_pins = missing_numbers(self.pinnumbers)
  77
  78         # Check-1: ensure no pin is present in both muxed and dedicated pins
  79         for muxcell in self.muxed_cells:
  80             for dedcel in self.dedicated_cells:
  81                 if dedcel[1] in muxcell:
  82                     print("ERROR: " + str(dedcel[1]) + " present \
  83                                           in dedicated & muxed lists")
  84                     exit(1)
  85
  86         # Check-2: if pin numbering is consistent:
  87         if missing_pins:
  88             print("ERROR: Following pins have no assignment: " +
  89                   str(missing_numbers(self.pinnumbers)))
  90             exit(1)
  91         unique = set(self.pinnumbers)
  92         duplicate = False
  93         for each in unique:
  94             count = self.pinnumbers.count(each)
  95             if count > 1:
  96                 print("ERROR: Multiple assignment for pin: " + str(each))
  97                 duplicate = True
  98         if duplicate:
  99             exit(1)
 100
 101         # Check-3: confirm if N_* matches the instances in the pinmap
 102         # ============================================================== #
 103
 104         # TODO
 105
 106     def get_cell_bit_width(self):
 107         max_num_cells = 0
 108         for cell in self.muxed_cells:
 109             max_num_cells = max(len(cell) - 1, max_num_cells)
 110         return int(math.log(max_num_cells + 1, 2))
 111
 112
 113 if __name__ == '__main__':
 114     p = Parse()
 115     print (p.N_IO)