diff options
Diffstat (limited to 'decoders/usb_protocol')
| -rw-r--r-- | decoders/usb_protocol/Makefile.am | 26 | ||||
| -rw-r--r-- | decoders/usb_protocol/__init__.py | 47 | ||||
| -rw-r--r-- | decoders/usb_protocol/pd.py | 137 |
3 files changed, 0 insertions, 210 deletions
diff --git a/decoders/usb_protocol/Makefile.am b/decoders/usb_protocol/Makefile.am deleted file mode 100644 index 7e1baa6..0000000 --- a/decoders/usb_protocol/Makefile.am +++ /dev/null @@ -1,26 +0,0 @@ -## -## This file is part of the libsigrokdecode project. -## -## Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de> -## -## 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, write to the Free Software -## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -## - -pkgdatadir = $(DECODERS_DIR)/usb_protocol - -dist_pkgdata_DATA = __init__.py pd.py - -CLEANFILES = *.pyc - diff --git a/decoders/usb_protocol/__init__.py b/decoders/usb_protocol/__init__.py deleted file mode 100644 index 5fa66f6..0000000 --- a/decoders/usb_protocol/__init__.py +++ /dev/null @@ -1,47 +0,0 @@ -## -## This file is part of the libsigrokdecode project. -## -## Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de> -## -## 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, write to the Free Software -## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -## - -''' -USB (low-speed and full-speed) protocol decoder. - -Protocol layer (USB spec, chapter 8): - -Bit/byte ordering: Bits are sent onto the bus LSB-first. Multibyte fields -are transmitted in little-endian order (i.e., LSB to MSB). - -SYNC field: All packets begin with a SYNC field (8 bits). - -Packet field format: Packets start with an SOP (Start Of Packet) delimiter -that is part of the SYNC field, and end with an EOP (End Of Packet). - -PID: A PID (packet identifier) follows the SYNC field of every packet. A PID -consists of a 4-bit packet type field, and a 4 bit check field. -The check field is the one's complement of the packet type field. - -Protocol output format: -TODO - -Details: -https://en.wikipedia.org/wiki/USB -http://www.usb.org/developers/docs/ -''' - -from .pd import * - diff --git a/decoders/usb_protocol/pd.py b/decoders/usb_protocol/pd.py deleted file mode 100644 index 92ee77a..0000000 --- a/decoders/usb_protocol/pd.py +++ /dev/null @@ -1,137 +0,0 @@ -## -## This file is part of the libsigrokdecode project. -## -## Copyright (C) 2011 Gareth McMullin <gareth@blacksphere.co.nz> -## Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de> -## -## 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, write to the Free Software -## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -## - -# USB (low-speed and full-speed) protocol decoder - -import sigrokdecode as srd - -# Packet IDs (PIDs). -# The first 4 bits are the 'packet type' field, the last 4 bits are the -# 'check field' (each bit in the check field must be the inverse of the resp. -# bit in the 'packet type' field; if not, that's a 'PID error'). -# For the 4-bit strings, the left-most '1' or '0' is the LSB, i.e. it's sent -# to the bus first. -pids = { - # Tokens - '10000111': ['OUT', 'Address & EP number in host-to-function transaction'], - '10010110': ['IN', 'Address & EP number in function-to-host transaction'], - '10100101': ['SOF', 'Start-Of-Frame marker & frame number'], - '10110100': ['SETUP', 'Address & EP number in host-to-function transaction for SETUP to a control pipe'], - - # Data - # Note: DATA2 and MDATA are HS-only. - '11000011': ['DATA0', 'Data packet PID even'], - '11010010': ['DATA1', 'Data packet PID odd'], - '11100001': ['DATA2', 'Data packet PID HS, high bandwidth isosynchronous transaction in a microframe'], - '11110000': ['MDATA', 'Data packet PID HS for split and high-bandwidth isosynchronous transactions'], - - # Handshake - '01001011': ['ACK', 'Receiver accepts error-free packet'], - '01011010': ['NAK', 'Receiver cannot accept or transmitter cannot send'], - '01111000': ['STALL', 'EP halted or control pipe request unsupported'], - '01101001': ['NYET', 'No response yet from receiver'], - - # Special - '00111100': ['PRE', 'Host-issued preamble; enables downstream bus traffic to low-speed devices'], - '00111100': ['ERR', 'Split transaction error handshake'], - '00011110': ['SPLIT', 'HS split transaction token'], - '00101101': ['PING', 'HS flow control probe for a bulk/control EP'], - '00001111': ['Reserved', 'Reserved PID'], -} - -def bitstr_to_num(bitstr): - if not bitstr: - return 0 - l = list(bitstr) - l.reverse() - return int(''.join(l), 2) - -def packet_decode(packet): - sync = packet[:8] - pid = packet[8:16] - pid = pids.get(pid, (pid, ''))[0] - - # Remove CRC. - if pid in ('OUT', 'IN', 'SOF', 'SETUP'): - data = packet[16:-5] - if pid == 'SOF': - data = str(bitstr_to_num(data)) - else: - dev = bitstr_to_num(data[:7]) - ep = bitstr_to_num(data[7:]) - data = 'DEV %d EP %d' % (dev, ep) - elif pid in ('DATA0', 'DATA1'): - data = packet[16:-16] - tmp = '' - while data: - tmp += '%02x ' % bitstr_to_num(data[:8]) - data = data[8:] - data = tmp - else: - data = packet[16:] - - # The SYNC pattern for low-speed/full-speed is KJKJKJKK (0001). - if sync != '00000001': - return 'SYNC INVALID: %s' % sync - - return pid + ' ' + data - -class Decoder(srd.Decoder): - api_version = 1 - id = 'usb_protocol' - name = 'USB protocol' - longname = 'Universal Serial Bus (LS/FS) protocol' - desc = 'USB (low-speed and full-speed) serial protocol.' - license = 'gplv2+' - inputs = ['usb_signalling'] - outputs = ['usb_protocol'] - probes = [] - optional_probes = [] - options = { - 'signalling': ['Signalling', 'full-speed'], - } - annotations = [ - ['Text', 'Human-readable text'] - ] - - def __init__(self): - self.sym = 'J' - self.samplenum = 0 - self.scount = 0 - self.packet = '' - self.state = 'IDLE' - - def start(self, metadata): - self.samplerate = metadata['samplerate'] - self.out_proto = self.add(srd.OUTPUT_PROTO, 'usb_protocol') - self.out_ann = self.add(srd.OUTPUT_ANN, 'usb_protocol') - - def report(self): - pass - - def decode(self, ss, es, data): - (ptype, pdata) = data - - if ptype == 'PACKET': - self.put(0, 0, self.out_ann, [0, [packet_decode(pdata)]]) - - # TODO. - |