src/pinmux_generator.py

   1 # ================================== Steps to add peripherals ============
   2 # Step-1:   create interface declaration for the peripheral to be added.
   3 #           Remember these are interfaces defined for the pinmux and hence
   4 #           will be opposite to those defined at the peripheral.
   5 #           For eg. the output TX from the UART will be input (method Action)
   6 #           for the pinmux.
   7 #           These changes will have to be done in interface_decl.py
   8 # Step-2    define the wires that will be required to transfer data from the
   9 #           peripheral interface to the IO cell and vice-versa. Create a
  10 #           mkDWire for each input/output between the peripheral and the
  11 #           pinmux. Also create an implicit wire of GenericIOType for each cell
  12 #           that can be connected to a each bit from the peripheral.
  13 #           These changes will have to be done in wire_def.py
  14 # Step-3:   create the definitions for each of the methods defined above.
  15 #           These changes will have to be done in interface_decl.py
  16 # ========================================================================
  17
  18 # default module imports
  19 import getopt
  20 import os.path
  21 import sys
  22 from spec import modules, specgen
  23
  24 from bsv.pinmux_generator import pinmuxgen as bsvgen
  25
  26
  27 def printhelp():
  28     print ('''pinmux_generator.py [-o outputdir] [-v|--validate] [-h|--help]
  29                                   [-t outputtype] [-s|--spec spec]
  30     -s | spec       : generate from spec (python module)
  31     -t | outputtype : outputtype, defaults to bsv
  32     -o outputdir    : defaults to bsv_src.  also location for reading pinmux.txt
  33                       interfaces.txt and *.txt
  34     -v | --validate : runs some validation on the pinmux
  35     -h | --help     : this help message
  36 ''')
  37
  38
  39 if __name__ == '__main__':
  40     try:
  41         options, remainder = getopt.getopt(
  42             sys.argv[1:],
  43             'o:vht:s:',
  44             ['output=',
  45              'validate',
  46              'outputtype=',
  47              'spec=',
  48              'help',
  49              'version=',
  50              ])
  51     except getopt.GetoptError as err:
  52         print "ERROR: %s" % str(err)
  53         printhelp()
  54         sys.exit(1)
  55
  56     output_type = 'bsv'
  57     output_dir = None
  58     validate = False
  59     spec = None
  60     pinspec = None
  61     for opt, arg in options:
  62         if opt in ('-o', '--output'):
  63             output_dir = arg
  64         elif opt in ('-s', '--spec'):
  65             pinspec = arg
  66         elif opt in ('-t', '--outputtype'):
  67             output_type = arg
  68         elif opt in ('-v', '--validate'):
  69             validate = True
  70         elif opt in ('-h', '--help'):
  71             printhelp()
  72             sys.exit(0)
  73
  74     if pinspec:
  75         if pinspec not in modules:
  76             print "ERROR: spec type '%s' does not exist" % pinspec
  77             printhelp()
  78             sys.exit(1)
  79         module = modules[pinspec]
  80         pinout, bankspec, fixedpins = module.pinspec()
  81         specgen(output_dir, pinout, bankspec, fixedpins)
  82     else:
  83         gentypes = {'bsv': bsvgen}
  84         if output_type not in gentypes:
  85             print "ERROR: output type '%s' does not exist" % output_type
  86             printhelp()
  87             sys.exit(0)
  88         gentypes[output_type](output_dir, validate)