mirror of
https://github.com/DreamSourceLab/DSView.git
synced 2025-01-13 13:32:53 +08:00
128 lines
4.0 KiB
Python
Executable File
128 lines
4.0 KiB
Python
Executable File
##
|
|
## This file is part of the libsigrokdecode project.
|
|
##
|
|
## Copyright (C) 2016 Robert Bosch Car Multimedia GmbH
|
|
## Authors: Oleksij Rempel
|
|
## <fixed-term.Oleksij.Rempel@de.bosch.com>
|
|
## <linux@rempel-privat.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, see <http://www.gnu.org/licenses/>.
|
|
##
|
|
|
|
import sigrokdecode as srd
|
|
|
|
class Decoder(srd.Decoder):
|
|
api_version = 3
|
|
id = 'ssi32'
|
|
name = 'SSI32'
|
|
longname = 'Synchronous Serial Interface (32bit)'
|
|
desc = 'Synchronous Serial Interface (32bit) protocol.'
|
|
license = 'gplv2+'
|
|
inputs = ['spi']
|
|
outputs = []
|
|
tags = ['Embedded/industrial']
|
|
options = (
|
|
{'id': 'msgsize', 'desc': 'Message size', 'default': 64},
|
|
)
|
|
annotations = (
|
|
('ctrl-tx', 'CTRL TX'),
|
|
('ack-tx', 'ACK TX'),
|
|
('ctrl-rx', 'CTRL RX'),
|
|
('ack-rx', 'ACK RX'),
|
|
)
|
|
annotation_rows = (
|
|
('tx', 'TX', (0, 1)),
|
|
('rx', 'RX', (2, 3)),
|
|
)
|
|
|
|
def __init__(self):
|
|
self.reset()
|
|
|
|
def reset(self):
|
|
self.ss_cmd, self.es_cmd = 0, 0
|
|
self.mosi_bytes = []
|
|
self.miso_bytes = []
|
|
self.es_array = []
|
|
self.rx_size = 0
|
|
self.tx_size = 0
|
|
|
|
def start(self):
|
|
self.out_ann = self.register(srd.OUTPUT_ANN)
|
|
|
|
def putx(self, data):
|
|
self.put(self.ss_cmd, self.es_cmd, self.out_ann, data)
|
|
|
|
def reset_data(self):
|
|
self.mosi_bytes = []
|
|
self.miso_bytes = []
|
|
self.es_array = []
|
|
|
|
def handle_ack(self):
|
|
# Only first byte should have ACK data, other 3 bytes are reserved.
|
|
self.es_cmd = self.es_array[0]
|
|
self.putx([1, ['> ACK:0x%02x' % (self.mosi_bytes[0])]])
|
|
self.putx([3, ['< ACK:0x%02x' % (self.miso_bytes[0])]])
|
|
|
|
def handle_ctrl(self):
|
|
mosi = miso = ''
|
|
self.tx_size = self.mosi_bytes[2]
|
|
self.rx_size = self.miso_bytes[2]
|
|
|
|
if self.tx_size > 0:
|
|
mosi = ', DATA:0x' + ''.join(format(x, '02x') for x in self.mosi_bytes[4:self.tx_size + 4])
|
|
if self.rx_size > 0:
|
|
miso = ', DATA:0x' + ''.join(format(x, '02x') for x in self.miso_bytes[4:self.rx_size + 4])
|
|
|
|
self.es_cmd = self.es_array[self.tx_size + 3]
|
|
self.putx([0, ['> CTRL:0x%02x, LUN:0x%02x, SIZE:0x%02x, CRC:0x%02x%s'
|
|
% (self.mosi_bytes[0], self.mosi_bytes[1],
|
|
self.mosi_bytes[2], self.mosi_bytes[3], mosi)]])
|
|
|
|
self.es_cmd = self.es_array[self.rx_size + 3]
|
|
self.putx([2, ['< CTRL:0x%02x, LUN:0x%02x, SIZE:0x%02x, CRC:0x%02x%s'
|
|
% (self.miso_bytes[0], self.miso_bytes[1],
|
|
self.miso_bytes[2], self.miso_bytes[3], miso)]])
|
|
|
|
def decode(self, ss, es, data):
|
|
ptype = data[0]
|
|
if ptype == 'CS-CHANGE':
|
|
self.reset_data()
|
|
return
|
|
|
|
# Don't care about anything else.
|
|
if ptype != 'DATA':
|
|
return
|
|
mosi, miso = data[1:]
|
|
|
|
self.ss, self.es = ss, es
|
|
|
|
if len(self.mosi_bytes) == 0:
|
|
self.ss_cmd = ss
|
|
self.mosi_bytes.append(mosi)
|
|
self.miso_bytes.append(miso)
|
|
self.es_array.append(es)
|
|
|
|
if self.mosi_bytes[0] & 0x80:
|
|
if len(self.mosi_bytes) < 4:
|
|
return
|
|
|
|
self.handle_ack()
|
|
self.reset_data()
|
|
else:
|
|
if len(self.mosi_bytes) < self.options['msgsize']:
|
|
return
|
|
|
|
self.handle_ctrl()
|
|
self.reset_data()
|