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Diffstat (limited to 'decoders/iec/pd.py')
| -rw-r--r-- | decoders/iec/pd.py | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/decoders/iec/pd.py b/decoders/iec/pd.py deleted file mode 100644 index ae0f8e9..0000000 --- a/decoders/iec/pd.py +++ /dev/null @@ -1,167 +0,0 @@ -## -## This file is part of the libsigrokdecode project. -## -## Copyright (C) 2017 Marcus Comstedt <marcus@mc.pp.se> -## -## This program is free software; you can redistribute it and/or modify -## it under the terms of the GNU General Public License as published by -## the Free Software Foundation; either version 2 of the License, or -## (at your option) any later version. -## -## This program is distributed in the hope that it will be useful, -## but WITHOUT ANY WARRANTY; without even the implied warranty of -## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -## GNU General Public License for more details. -## -## You should have received a copy of the GNU General Public License -## along with this program; if not, see <http://www.gnu.org/licenses/>. -## - -import sigrokdecode as srd - -step_wait_conds = ( - [{2: 'f'}, {0: 'l', 1: 'h'}], - [{2: 'f'}, {0: 'h', 1: 'h'}, {1: 'l'}], - [{2: 'f'}, {0: 'f'}, {1: 'l'}], - [{2: 'f'}, {1: 'e'}], -) - -class Decoder(srd.Decoder): - api_version = 3 - id = 'iec' - name = 'IEC' - longname = 'Commodore IEC bus' - desc = 'Commodore serial IEEE-488 (IEC) bus protocol.' - license = 'gplv2+' - inputs = ['logic'] - outputs = [] - tags = ['PC', 'Retro computing'] - channels = ( - {'id': 'data', 'name': 'DATA', 'desc': 'Data I/O'}, - {'id': 'clk', 'name': 'CLK', 'desc': 'Clock'}, - {'id': 'atn', 'name': 'ATN', 'desc': 'Attention'}, - ) - optional_channels = ( - {'id': 'srq', 'name': 'SRQ', 'desc': 'Service request'}, - ) - annotations = ( - ('items', 'Items'), - ('gpib', 'DAT/CMD'), - ('eoi', 'EOI'), - ) - annotation_rows = ( - ('bytes', 'Bytes', (0,)), - ('gpib', 'DAT/CMD', (1,)), - ('eoi', 'EOI', (2,)), - ) - - def __init__(self): - self.reset() - - def reset(self): - self.saved_ATN = False - self.saved_EOI = False - self.ss_item = self.es_item = None - self.step = 0 - self.bits = 0 - self.numbits = 0 - - def start(self): - self.out_ann = self.register(srd.OUTPUT_ANN) - - def putb(self, data): - self.put(self.ss_item, self.es_item, self.out_ann, data) - - def handle_bits(self): - # Output the saved item. - dbyte = self.bits - dATN = self.saved_ATN - dEOI = self.saved_EOI - self.es_item = self.samplenum - self.putb([0, ['%02X' % dbyte]]) - - # Encode item byte to GPIB convention. - self.strgpib = ' ' - if dATN: # ATN, decode commands. - # Note: Commands < 0x20 are not used on IEC bus. - if dbyte == 0x01: self.strgpib = 'GTL' - if dbyte == 0x04: self.strgpib = 'SDC' - if dbyte == 0x05: self.strgpib = 'PPC' - if dbyte == 0x08: self.strgpib = 'GET' - if dbyte == 0x09: self.strgpib = 'TCT' - if dbyte == 0x11: self.strgpib = 'LLO' - if dbyte == 0x14: self.strgpib = 'DCL' - if dbyte == 0x15: self.strgpib = 'PPU' - if dbyte == 0x18: self.strgpib = 'SPE' - if dbyte == 0x19: self.strgpib = 'SPD' - - if dbyte == 0x3f: self.strgpib = 'UNL' - if dbyte == 0x5f: self.strgpib = 'UNT' - if dbyte > 0x1f and dbyte < 0x3f: # Address listener. - self.strgpib = 'L' + chr(dbyte + 0x10) - if dbyte > 0x3f and dbyte < 0x5f: # Address talker. - self.strgpib = 'T' + chr(dbyte - 0x10) - if dbyte > 0x5f and dbyte < 0x70: # Channel reopen. - self.strgpib = 'R' + chr(dbyte - 0x30) - if dbyte > 0xdf and dbyte < 0xf0: # Channel close. - self.strgpib = 'C' + chr(dbyte - 0xb0) - if dbyte > 0xef: # Channel open. - self.strgpib = 'O' + chr(dbyte - 0xc0) - else: - if dbyte > 0x1f and dbyte < 0x7f: - self.strgpib = chr(dbyte) - if dbyte == 0x0a: - self.strgpib = 'LF' - if dbyte == 0x0d: - self.strgpib = 'CR' - - self.putb([1, [self.strgpib]]) - self.strEOI = ' ' - if dEOI: - self.strEOI = 'EOI' - self.putb([2, [self.strEOI]]) - - def decode(self): - while True: - - data, clk, atn, srq = self.wait(step_wait_conds[self.step]) - - if self.matched[0]: - # Falling edge on ATN, reset step. - self.step = 0 - - if self.step == 0: - # Don't use self.matched[1] here since we might come from - # a step with different conds due to the code above. - if data == 0 and clk == 1: - # Rising edge on CLK while DATA is low: Ready to send. - self.step = 1 - elif self.step == 1: - if data == 1 and clk == 1: - # Rising edge on DATA while CLK is high: Ready for data. - self.ss_item = self.samplenum - self.saved_ATN = not atn - self.saved_EOI = False - self.bits = 0 - self.numbits = 0 - self.step = 2 - elif clk == 0: - # CLK low again, transfer aborted. - self.step = 0 - elif self.step == 2: - if data == 0 and clk == 1: - # DATA goes low while CLK is still high, EOI confirmed. - self.saved_EOI = True - elif clk == 0: - self.step = 3 - elif self.step == 3: - if self.matched[1]: - if clk == 1: - # Rising edge on CLK; latch DATA. - self.bits |= data << self.numbits - elif clk == 0: - # Falling edge on CLK; end of bit. - self.numbits += 1 - if self.numbits == 8: - self.handle_bits() - self.step = 0 |