729 lines
26 KiB
Python
729 lines
26 KiB
Python
#!/usr/bin/python3.0
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# Copyright 2008, SoftPLC Corporation http://softplc.com
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# Dick Hollenbeck dick@softplc.com
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, you may find one here:
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# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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# or you may search the http://www.gnu.org website for the version 2 license,
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# or you may write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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# A python program to convert an SVF file to an XSVF file. There is an
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# option to include comments containing the source file line number from the origin
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# SVF file before each outputted XSVF statement.
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#
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# We deviate from the XSVF spec in that we introduce a new command called
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# XWAITSTATE which directly flows from the SVF RUNTEST command. Unfortunately
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# XRUNSTATE was ill conceived and is not used here. We also add support for the
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# three Lattice extensions to SVF: LCOUNT, LDELAY, and LSDR. The xsvf file
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# generated from this program is suitable for use with the xsvf player in
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# OpenOCD with my modifications to xsvf.c.
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#
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# This program is written for python 3.0, and it is not easy to change this
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# back to 2.x. You may find it easier to use python 3.x even if that means
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# building it.
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import re
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import sys
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import struct
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# There are both ---<Lexer>--- and ---<Parser>--- sections to this program
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if len( sys.argv ) < 3:
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print("usage %s <svf_filename> <xsvf_filename>" % sys.argv[0])
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exit(1)
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inputFilename = sys.argv[1]
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outputFilename = sys.argv[2]
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doCOMMENTs = True # Save XCOMMENTs in the output xsvf file
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#doCOMMENTs = False # Save XCOMMENTs in the output xsvf file
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# pick your file encoding
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file_encoding = 'ISO-8859-1'
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#file_encoding = 'utf-8'
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xrepeat = 0 # argument to XREPEAT, gives retry count for masked compares
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#-----< Lexer >---------------------------------------------------------------
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StateBin = (RESET,IDLE,
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DRSELECT,DRCAPTURE,DRSHIFT,DREXIT1,DRPAUSE,DREXIT2,DRUPDATE,
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IRSELECT,IRCAPTURE,IRSHIFT,IREXIT1,IRPAUSE,IREXIT2,IRUPDATE) = range(16)
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# Any integer index into this tuple will be equal to its corresponding StateBin value
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StateTxt = ("RESET","IDLE",
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"DRSELECT","DRCAPTURE","DRSHIFT","DREXIT1","DRPAUSE","DREXIT2","DRUPDATE",
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"IRSELECT","IRCAPTURE","IRSHIFT","IREXIT1","IRPAUSE","IREXIT2","IRUPDATE")
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(XCOMPLETE,XTDOMASK,XSIR,XSDR,XRUNTEST,hole0,hole1,XREPEAT,XSDRSIZE,XSDRTDO,
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XSETSDRMASKS,XSDRINC,XSDRB,XSDRC,XSDRE,XSDRTDOB,XSDRTDOC,
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XSDRTDOE,XSTATE,XENDIR,XENDDR,XSIR2,XCOMMENT,XWAIT,XWAITSTATE,
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LCOUNT,LDELAY,LSDR,XTRST) = range(29)
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#Note: LCOUNT, LDELAY, and LSDR are Lattice extensions to SVF and provide a way to loop back
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# and check a completion status, essentially waiting on a part until it signals that it is done.
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# For example below: loop 25 times, each time through the loop do a LDELAY (same as a true RUNTEST)
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# and exit loop when LSDR compares match.
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"""
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LCOUNT 25;
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! Step to DRPAUSE give 5 clocks and wait for 1.00e+000 SEC.
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LDELAY DRPAUSE 5 TCK 1.00E-003 SEC;
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! Test for the completed status. Match means pass.
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! Loop back to LDELAY line if not match and loop count less than 25.
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LSDR 1 TDI (0)
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TDO (1);
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"""
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#XTRST is an opcode Xilinx seemed to have missed and it comes from the SVF TRST statement.
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LineNumber = 1
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def s_ident(scanner, token): return ("ident", token.upper(), LineNumber)
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def s_hex(scanner, token):
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global LineNumber
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LineNumber = LineNumber + token.count('\n')
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token = ''.join(token.split())
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return ("hex", token[1:-1], LineNumber)
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def s_int(scanner, token): return ("int", int(token), LineNumber)
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def s_float(scanner, token): return ("float", float(token), LineNumber)
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#def s_comment(scanner, token): return ("comment", token, LineNumber)
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def s_semicolon(scanner, token): return ("semi", token, LineNumber)
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def s_nl(scanner,token):
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global LineNumber
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LineNumber = LineNumber + 1
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#print( 'LineNumber=', LineNumber, file=sys.stderr )
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return None
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#2.00E-002
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scanner = re.Scanner([
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(r"[a-zA-Z]\w*", s_ident),
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# (r"[-+]?[0-9]+[.]?[0-9]*([eE][-+]?[0-9]+)?", s_float),
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(r"[-+]?[0-9]+(([.][0-9eE+-]*)|([eE]+[-+]?[0-9]+))", s_float),
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(r"\d+", s_int),
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(r"\(([0-9a-fA-F]|\s)*\)", s_hex),
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(r"(!|//).*$", None),
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(r";", s_semicolon),
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(r"\n",s_nl),
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(r"\s*", None),
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],
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re.MULTILINE
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)
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# open the file using the given encoding
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file = open( sys.argv[1], encoding=file_encoding )
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# read all svf file input into string "input"
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input = file.read()
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file.close()
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# Lexer:
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# create a list of tuples containing (tokenType, tokenValue, LineNumber)
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tokens = scanner.scan( input )[0]
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input = None # allow gc to reclaim memory holding file
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#for tokenType, tokenValue, ln in tokens: print( "line %d: %s" % (ln, tokenType), tokenValue )
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#-----<parser>-----------------------------------------------------------------
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tokVal = tokType = tokLn = None
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tup = iter( tokens )
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def nextTok():
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"""
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Function to read the next token from tup into tokType, tokVal, tokLn (linenumber)
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which are globals.
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"""
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global tokType, tokVal, tokLn, tup
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tokType, tokVal, tokLn = tup.__next__()
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class ParseError(Exception):
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"""A class to hold a parsing error message"""
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def __init__(self, linenumber, token, message):
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self.linenumber = linenumber
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self.token = token
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self.message = message
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def __str__(self):
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global inputFilename
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return "Error in file \'%s\' at line %d near token %s\n %s" % (
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inputFilename, self.linenumber, repr(self.token), self.message)
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class MASKSET(object):
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"""
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Class MASKSET holds a set of bit vectors, all of which are related, will all
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have the same length, and are associated with one of the seven shiftOps:
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HIR, HDR, TIR, TDR, SIR, SDR, LSDR. One of these holds a mask, smask, tdi, tdo, and a
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size.
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"""
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def __init__(self, name):
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self.empty()
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self.name = name
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def empty(self):
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self.mask = bytearray()
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self.smask = bytearray()
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self.tdi = bytearray()
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self.tdo = bytearray()
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self.size = 0
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def syncLengths( self, sawTDI, sawTDO, sawMASK, sawSMASK, newSize ):
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"""
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Set all the lengths equal in the event some of the masks were
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not seen as part of the last change set.
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"""
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if self.size == newSize:
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return
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if newSize == 0:
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self.empty()
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return
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# If an SIR was given without a MASK(), then use a mask of all zeros.
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# this is not consistent with the SVF spec, but it makes sense because
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# it would be odd to be testing an instruction register read out of a
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# tap without giving a mask for it. Also, lattice seems to agree and is
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# generating SVF files that comply with this philosophy.
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if self.name == 'SIR' and not sawMASK:
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self.mask = bytearray( newSize )
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if newSize != len(self.mask):
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self.mask = bytearray( newSize )
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if self.name == 'SDR': # leave mask for HIR,HDR,TIR,TDR,SIR zeros
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for i in range( newSize ):
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self.mask[i] = 1
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if newSize != len(self.tdo):
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self.tdo = bytearray( newSize )
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if newSize != len(self.tdi):
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self.tdi = bytearray( newSize )
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if newSize != len(self.smask):
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self.smask = bytearray( newSize )
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self.size = newSize
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#-----</MASKSET>-----
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def makeBitArray( hexString, bitCount ):
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"""
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Converts a packed sequence of hex ascii characters into a bytearray where
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each element in the array holds exactly one bit. Only "bitCount" bits are
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scanned and these must be the least significant bits in the hex number. That
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is, it is legal to have some unused bits in the must significant hex nibble
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of the input "hexString". The string is scanned starting from the backend,
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then just before returning we reverse the array. This way the append()
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method can be used, which I assume is faster than an insert.
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"""
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global tokLn
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a = bytearray()
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length = bitCount
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hexString = list(hexString)
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hexString.reverse()
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#print(hexString)
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for c in hexString:
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if length <= 0:
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break;
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c = int(c, 16)
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for mask in [1,2,4,8]:
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if length <= 0:
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break;
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length = length - 1
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a.append( (c & mask) != 0 )
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if length > 0:
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raise ParseError( tokLn, hexString, "Insufficient hex characters for given length of %d" % bitCount )
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a.reverse()
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#print(a)
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return a
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def makeXSVFbytes( bitarray ):
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"""
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Make a bytearray which is contains the XSVF bits which will be written
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directly to disk. The number of bytes needed is calculated from the size
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of the argument bitarray.
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"""
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bitCount = len(bitarray)
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byteCount = (bitCount+7)//8
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ba = bytearray( byteCount )
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firstBit = (bitCount % 8) - 1
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if firstBit == -1:
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firstBit = 7
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bitNdx = 0
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for byteNdx in range(byteCount):
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mask = 1<<firstBit
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byte = 0
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while mask:
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if bitarray[bitNdx]:
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byte |= mask;
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mask = mask >> 1
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bitNdx = bitNdx + 1
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ba[byteNdx] = byte
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firstBit = 7
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return ba
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def writeComment( outputFile, shiftOp_linenum, shiftOp ):
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"""
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Write an XCOMMENT record to outputFile
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"""
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comment = "%s @%d\0" % (shiftOp, shiftOp_linenum) # \0 is terminating nul
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ba = bytearray(1)
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ba[0] = XCOMMENT
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ba += comment.encode()
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outputFile.write( ba )
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def combineBitVectors( trailer, meat, header ):
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"""
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Combine the 3 bit vectors comprizing a transmission. Since the least
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significant bits are sent first, the header is put onto the list last so
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they are sent first from that least significant position.
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"""
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ret = bytearray()
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ret.extend( trailer )
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ret.extend( meat )
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ret.extend( header )
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return ret
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def writeRUNTEST( outputFile, run_state, end_state, run_count, min_time, tokenTxt ):
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"""
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Write the output for the SVF RUNTEST command.
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run_count - the number of clocks
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min_time - the number of seconds
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tokenTxt - either RUNTEST or LDELAY
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"""
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# convert from secs to usecs
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min_time = int( min_time * 1000000)
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# the SVF RUNTEST command does NOT map to the XSVF XRUNTEST command. Check the SVF spec, then
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# read the XSVF command. They are not the same. Use an XSVF XWAITSTATE to
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# implement the required behavior of the SVF RUNTEST command.
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if doCOMMENTs:
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writeComment( output, tokLn, tokenTxt )
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if tokenTxt == 'RUNTEST':
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obuf = bytearray(11)
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obuf[0] = XWAITSTATE
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obuf[1] = run_state
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obuf[2] = end_state
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struct.pack_into(">i", obuf, 3, run_count ) # big endian 4 byte int to obuf
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struct.pack_into(">i", obuf, 7, min_time ) # big endian 4 byte int to obuf
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outputFile.write( obuf )
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else: # == 'LDELAY'
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obuf = bytearray(10)
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obuf[0] = LDELAY
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obuf[1] = run_state
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# LDELAY has no end_state
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struct.pack_into(">i", obuf, 2, run_count ) # big endian 4 byte int to obuf
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struct.pack_into(">i", obuf, 6, min_time ) # big endian 4 byte int to obuf
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outputFile.write( obuf )
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output = open( outputFilename, mode='wb' )
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hir = MASKSET('HIR')
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hdr = MASKSET('HDR')
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tir = MASKSET('TIR')
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tdr = MASKSET('TDR')
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sir = MASKSET('SIR')
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sdr = MASKSET('SDR')
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expecting_eof = True
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# one of the commands that take the shiftParts after the length, the parse
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# template for all of these commands is identical
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shiftOps = ('SDR', 'SIR', 'LSDR', 'HDR', 'HIR', 'TDR', 'TIR')
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# the order must correspond to shiftOps, this holds the MASKSETS. 'LSDR' shares sdr with 'SDR'
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shiftSets = (sdr, sir, sdr, hdr, hir, tdr, tir )
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# what to expect as parameters to a shiftOp, i.e. after a SDR length or SIR length
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shiftParts = ('TDI', 'TDO', 'MASK', 'SMASK')
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# the set of legal states which can trail the RUNTEST command
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run_state_allowed = ('IRPAUSE', 'DRPAUSE', 'RESET', 'IDLE')
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enddr_state_allowed = ('DRPAUSE', 'IDLE')
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endir_state_allowed = ('IRPAUSE', 'IDLE')
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trst_mode_allowed = ('ON', 'OFF', 'Z', 'ABSENT')
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enddr_state = IDLE
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endir_state = IDLE
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frequency = 1.00e+006 # HZ;
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# change detection for xsdrsize and xtdomask
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xsdrsize = -1 # the last one sent, send only on change
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xtdomask = bytearray() # the last one sent, send only on change
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# we use a number of single byte writes for the XSVF command below
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cmdbuf = bytearray(1)
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# Save the XREPEAT setting into the file as first thing.
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obuf = bytearray(2)
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obuf[0] = XREPEAT
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obuf[1] = xrepeat
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output.write( obuf )
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try:
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while 1:
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expecting_eof = True
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nextTok()
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expecting_eof = False
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# print( tokType, tokVal, tokLn )
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if tokVal in shiftOps:
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shiftOp_linenum = tokLn
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shiftOp = tokVal
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set = shiftSets[shiftOps.index(shiftOp)]
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# set flags false, if we see one later, set that one true later
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sawTDI = sawTDO = sawMASK = sawSMASK = False
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nextTok()
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if tokType != 'int':
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raise ParseError( tokLn, tokVal, "Expecting 'int' giving %s length, got '%s'" % (shiftOp, tokType) )
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length = tokVal
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nextTok()
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while tokVal != ';':
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if tokVal not in shiftParts:
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raise ParseError( tokLn, tokVal, "Expecting TDI, TDO, MASK, SMASK, or ';'")
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shiftPart = tokVal
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nextTok()
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if tokType != 'hex':
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raise ParseError( tokLn, tokVal, "Expecting hex bits" )
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bits = makeBitArray( tokVal, length )
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if shiftPart == 'TDI':
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sawTDI = True
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set.tdi = bits
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elif shiftPart == 'TDO':
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sawTDO = True
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set.tdo = bits
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elif shiftPart == 'MASK':
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sawMASK = True
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set.mask = bits
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elif shiftPart == 'SMASK':
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sawSMASK = True
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set.smask = bits
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nextTok()
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set.syncLengths( sawTDI, sawTDO, sawMASK, sawSMASK, length )
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# process all the gathered parameters and generate outputs here
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if shiftOp == 'SIR':
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if doCOMMENTs:
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writeComment( output, shiftOp_linenum, 'SIR' )
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tdi = combineBitVectors( tir.tdi, sir.tdi, hir.tdi )
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if len(tdi) > 255:
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obuf = bytearray(3)
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obuf[0] = XSIR2
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struct.pack_into( ">h", obuf, 1, len(tdi) )
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else:
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obuf = bytearray(2)
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obuf[0] = XSIR
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obuf[1] = len(tdi)
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output.write( obuf )
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obuf = makeXSVFbytes( tdi )
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output.write( obuf )
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elif shiftOp == 'SDR':
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if doCOMMENTs:
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writeComment( output, shiftOp_linenum, shiftOp )
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if not sawTDO:
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# pass a zero filled bit vector for the sdr.mask
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mask = combineBitVectors( tdr.mask, bytearray(sdr.size), hdr.mask )
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tdi = combineBitVectors( tdr.tdi, sdr.tdi, hdr.tdi )
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if xsdrsize != len(tdi):
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xsdrsize = len(tdi)
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cmdbuf[0] = XSDRSIZE
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output.write( cmdbuf )
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obuf = bytearray(4)
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struct.pack_into( ">i", obuf, 0, xsdrsize ) # big endian 4 byte int to obuf
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output.write( obuf )
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if xtdomask != mask:
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xtdomask = mask
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cmdbuf[0] = XTDOMASK
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output.write( cmdbuf )
|
|
obuf = makeXSVFbytes( mask )
|
|
output.write( obuf )
|
|
|
|
cmdbuf[0] = XSDR
|
|
output.write( cmdbuf )
|
|
obuf = makeXSVFbytes( tdi )
|
|
output.write( obuf )
|
|
|
|
else:
|
|
mask = combineBitVectors( tdr.mask, sdr.mask, hdr.mask )
|
|
tdi = combineBitVectors( tdr.tdi, sdr.tdi, hdr.tdi )
|
|
tdo = combineBitVectors( tdr.tdo, sdr.tdo, hdr.tdo )
|
|
|
|
if xsdrsize != len(tdi):
|
|
xsdrsize = len(tdi)
|
|
cmdbuf[0] = XSDRSIZE
|
|
output.write( cmdbuf )
|
|
obuf = bytearray(4)
|
|
struct.pack_into(">i", obuf, 0, xsdrsize ) # big endian 4 byte int to obuf
|
|
output.write( obuf )
|
|
|
|
if xtdomask != mask:
|
|
xtdomask = mask
|
|
cmdbuf[0] = XTDOMASK
|
|
output.write( cmdbuf )
|
|
obuf = makeXSVFbytes( mask )
|
|
output.write( obuf )
|
|
|
|
cmdbuf[0] = XSDRTDO
|
|
output.write( cmdbuf )
|
|
obuf = makeXSVFbytes( tdi )
|
|
output.write( obuf )
|
|
obuf = makeXSVFbytes( tdo )
|
|
output.write( obuf )
|
|
#print( "len(tdo)=", len(tdo), "len(tdr.tdo)=", len(tdr.tdo), "len(sdr.tdo)=", len(sdr.tdo), "len(hdr.tdo)=", len(hdr.tdo) )
|
|
|
|
elif shiftOp == 'LSDR':
|
|
if doCOMMENTs:
|
|
writeComment( output, shiftOp_linenum, shiftOp )
|
|
|
|
mask = combineBitVectors( tdr.mask, sdr.mask, hdr.mask )
|
|
tdi = combineBitVectors( tdr.tdi, sdr.tdi, hdr.tdi )
|
|
tdo = combineBitVectors( tdr.tdo, sdr.tdo, hdr.tdo )
|
|
|
|
if xsdrsize != len(tdi):
|
|
xsdrsize = len(tdi)
|
|
cmdbuf[0] = XSDRSIZE
|
|
output.write( cmdbuf )
|
|
obuf = bytearray(4)
|
|
struct.pack_into(">i", obuf, 0, xsdrsize ) # big endian 4 byte int to obuf
|
|
output.write( obuf )
|
|
|
|
if xtdomask != mask:
|
|
xtdomask = mask
|
|
cmdbuf[0] = XTDOMASK
|
|
output.write( cmdbuf )
|
|
obuf = makeXSVFbytes( mask )
|
|
output.write( obuf )
|
|
|
|
cmdbuf[0] = LSDR
|
|
output.write( cmdbuf )
|
|
obuf = makeXSVFbytes( tdi )
|
|
output.write( obuf )
|
|
obuf = makeXSVFbytes( tdo )
|
|
output.write( obuf )
|
|
#print( "len(tdo)=", len(tdo), "len(tdr.tdo)=", len(tdr.tdo), "len(sdr.tdo)=", len(sdr.tdo), "len(hdr.tdo)=", len(hdr.tdo) )
|
|
|
|
elif tokVal == 'RUNTEST' or tokVal == 'LDELAY':
|
|
# e.g. from lattice tools:
|
|
# "RUNTEST IDLE 5 TCK 1.00E-003 SEC;"
|
|
saveTok = tokVal
|
|
nextTok()
|
|
min_time = 0
|
|
run_count = 0
|
|
max_time = 600 # ten minutes
|
|
if tokVal in run_state_allowed:
|
|
run_state = StateTxt.index(tokVal)
|
|
end_state = run_state # bottom of page 17 of SVF spec
|
|
nextTok()
|
|
if tokType != 'int' and tokType != 'float':
|
|
raise ParseError( tokLn, tokVal, "Expecting 'int' or 'float' after RUNTEST [run_state]")
|
|
timeval = tokVal;
|
|
nextTok()
|
|
if tokVal != 'TCK' and tokVal != 'SEC' and tokVal != 'SCK':
|
|
raise ParseError( tokLn, tokVal, "Expecting 'TCK' or 'SEC' or 'SCK' after RUNTEST [run_state] (run_count|min_time)")
|
|
if tokVal == 'TCK' or tokVal == 'SCK':
|
|
run_count = int( timeval )
|
|
else:
|
|
min_time = timeval
|
|
nextTok()
|
|
if tokType == 'int' or tokType == 'float':
|
|
min_time = tokVal
|
|
nextTok()
|
|
if tokVal != 'SEC':
|
|
raise ParseError( tokLn, tokVal, "Expecting 'SEC' after RUNTEST [run_state] run_count min_time")
|
|
nextTok()
|
|
if tokVal == 'MAXIMUM':
|
|
nextTok()
|
|
if tokType != 'int' and tokType != 'float':
|
|
raise ParseError( tokLn, tokVal, "Expecting 'max_time' after RUNTEST [run_state] min_time SEC MAXIMUM")
|
|
max_time = tokVal
|
|
nextTok()
|
|
if tokVal != 'SEC':
|
|
raise ParseError( tokLn, tokVal, "Expecting 'max_time' after RUNTEST [run_state] min_time SEC MAXIMUM max_time")
|
|
nextTok()
|
|
if tokVal == 'ENDSTATE':
|
|
nextTok()
|
|
if tokVal not in run_state_allowed:
|
|
raise ParseError( tokLn, tokVal, "Expecting 'run_state' after RUNTEST .... ENDSTATE")
|
|
end_state = StateTxt.index(tokVal)
|
|
nextTok()
|
|
if tokVal != ';':
|
|
raise ParseError( tokLn, tokVal, "Expecting ';' after RUNTEST ....")
|
|
# print( "run_count=", run_count, "min_time=", min_time,
|
|
# "max_time=", max_time, "run_state=", State[run_state], "end_state=", State[end_state] )
|
|
writeRUNTEST( output, run_state, end_state, run_count, min_time, saveTok )
|
|
|
|
elif tokVal == 'LCOUNT':
|
|
nextTok()
|
|
if tokType != 'int':
|
|
raise ParseError( tokLn, tokVal, "Expecting integer 'count' after LCOUNT")
|
|
loopCount = tokVal
|
|
nextTok()
|
|
if tokVal != ';':
|
|
raise ParseError( tokLn, tokVal, "Expecting ';' after LCOUNT count")
|
|
if doCOMMENTs:
|
|
writeComment( output, tokLn, 'LCOUNT' )
|
|
obuf = bytearray(5)
|
|
obuf[0] = LCOUNT
|
|
struct.pack_into(">i", obuf, 1, loopCount ) # big endian 4 byte int to obuf
|
|
output.write( obuf )
|
|
|
|
elif tokVal == 'ENDDR':
|
|
nextTok()
|
|
if tokVal not in enddr_state_allowed:
|
|
raise ParseError( tokLn, tokVal, "Expecting 'stable_state' after ENDDR. (one of: DRPAUSE, IDLE)")
|
|
enddr_state = StateTxt.index(tokVal)
|
|
nextTok()
|
|
if tokVal != ';':
|
|
raise ParseError( tokLn, tokVal, "Expecting ';' after ENDDR stable_state")
|
|
if doCOMMENTs:
|
|
writeComment( output, tokLn, 'ENDDR' )
|
|
obuf = bytearray(2)
|
|
obuf[0] = XENDDR
|
|
# Page 10 of the March 1999 SVF spec shows that RESET is also allowed here.
|
|
# Yet the XSVF spec has no provision for that, and uses a non-standard, i.e.
|
|
# boolean argument to XENDDR which only handles two of the 3 intended states.
|
|
obuf[1] = 1 if enddr_state == DRPAUSE else 0
|
|
output.write( obuf )
|
|
|
|
elif tokVal == 'ENDIR':
|
|
nextTok()
|
|
if tokVal not in endir_state_allowed:
|
|
raise ParseError( tokLn, tokVal, "Expecting 'stable_state' after ENDIR. (one of: IRPAUSE, IDLE)")
|
|
endir_state = StateTxt.index(tokVal)
|
|
nextTok()
|
|
if tokVal != ';':
|
|
raise ParseError( tokLn, tokVal, "Expecting ';' after ENDIR stable_state")
|
|
if doCOMMENTs:
|
|
writeComment( output, tokLn, 'ENDIR' )
|
|
obuf = bytearray(2)
|
|
obuf[0] = XENDIR
|
|
# Page 10 of the March 1999 SVF spec shows that RESET is also allowed here.
|
|
# Yet the XSVF spec has no provision for that, and uses a non-standard, i.e.
|
|
# boolean argument to XENDDR which only handles two of the 3 intended states.
|
|
obuf[1] = 1 if endir_state == IRPAUSE else 0
|
|
output.write( obuf )
|
|
|
|
elif tokVal == 'STATE':
|
|
nextTok()
|
|
ln = tokLn
|
|
while tokVal != ';':
|
|
if tokVal not in StateTxt:
|
|
raise ParseError( tokLn, tokVal, "Expecting 'stable_state' after STATE")
|
|
stable_state = StateTxt.index( tokVal )
|
|
|
|
if doCOMMENTs and ln != -1:
|
|
writeComment( output, ln, 'STATE' )
|
|
ln = -1 # save comment only once
|
|
|
|
obuf = bytearray(2)
|
|
obuf[0] = XSTATE
|
|
obuf[1] = stable_state
|
|
output.write( obuf )
|
|
nextTok()
|
|
|
|
elif tokVal == 'FREQUENCY':
|
|
nextTok()
|
|
if tokVal != ';':
|
|
if tokType != 'int' and tokType != 'float':
|
|
raise ParseError( tokLn, tokVal, "Expecting 'cycles HZ' after FREQUENCY")
|
|
frequency = tokVal
|
|
nextTok()
|
|
if tokVal != 'HZ':
|
|
raise ParseError( tokLn, tokVal, "Expecting 'HZ' after FREQUENCY cycles")
|
|
nextTok()
|
|
if tokVal != ';':
|
|
raise ParseError( tokLn, tokVal, "Expecting ';' after FREQUENCY cycles HZ")
|
|
|
|
elif tokVal == 'TRST':
|
|
nextTok()
|
|
if tokVal not in trst_mode_allowed:
|
|
raise ParseError( tokLn, tokVal, "Expecting 'ON|OFF|Z|ABSENT' after TRST")
|
|
trst_mode = tokVal
|
|
nextTok()
|
|
if tokVal != ';':
|
|
raise ParseError( tokLn, tokVal, "Expecting ';' after TRST trst_mode")
|
|
if doCOMMENTs:
|
|
writeComment( output, tokLn, 'TRST %s' % trst_mode )
|
|
obuf = bytearray( 2 )
|
|
obuf[0] = XTRST
|
|
obuf[1] = trst_mode_allowed.index( trst_mode ) # use the index as the binary argument to XTRST opcode
|
|
output.write( obuf )
|
|
|
|
else:
|
|
raise ParseError( tokLn, tokVal, "Unknown token '%s'" % tokVal)
|
|
|
|
except StopIteration:
|
|
if not expecting_eof:
|
|
print( "Unexpected End of File at line ", tokLn )
|
|
|
|
except ParseError as pe:
|
|
print( "\n", pe )
|
|
|
|
finally:
|
|
# print( "closing file" )
|
|
cmdbuf[0] = XCOMPLETE
|
|
output.write( cmdbuf )
|
|
output.close()
|