/usr/share/libsigrokdecode/decoders/ade77xx/pd.py is in libsigrokdecode4 0.5.0-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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## This file is part of the libsigrokdecode project.
##
## Copyright (C) 2017 Karl Palsson <karlp@etactica.com>
##
## Permission is hereby granted, free of charge, to any person obtaining a copy
## of this software and associated documentation files (the "Software"), to deal
## in the Software without restriction, including without limitation the rights
## to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
## copies of the Software, and to permit persons to whom the Software is
## furnished to do so, subject to the following conditions:
##
## The above copyright notice and this permission notice shall be included in all
## copies or substantial portions of the Software.
##
## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
## IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
## AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
## OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
## SOFTWARE.
import math
import sigrokdecode as srd
from .lists import *
class Decoder(srd.Decoder):
api_version = 2
id = 'ade77xx'
name = 'ADE77xx'
longname = 'Analog Devices ADE77xx'
desc = 'Poly phase multifunction energy metering IC protocol.'
license = 'mit'
inputs = ['spi']
outputs = ['ade77xx']
annotations = (
('read', 'Register read commands'),
('write', 'Register write commands'),
('warning', 'Warnings'),
)
annotation_rows = (
('read', 'Read', (0,)),
('write', 'Write', (1,)),
('warnings', 'Warnings', (2,)),
)
def reset(self):
self.expected = 0
self.mosi_bytes, self.miso_bytes = [], []
def __init__(self):
self.ss_cmd, self.es_cmd = 0, 0
self.reset()
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 put_warn(self, pos, msg):
self.put(pos[0], pos[1], self.out_ann, [2, [msg]])
def decode(self, ss, es, data):
ptype = data[0]
if ptype == 'CS-CHANGE':
# Bear in mind, that CS is optional according to the datasheet.
# If we transition high mid-stream, toss out our data and restart.
cs_old, cs_new = data[1:]
if cs_old is not None and cs_old == 0 and cs_new == 1:
if len(self.mosi_bytes) > 0 and len(self.mosi_bytes[1:]) < self.expected:
# Mark short read/write for reg at least!
self.es_cmd = es
write, reg = self.cmd & 0x80, self.cmd & 0x7f
rblob = regs.get(reg)
idx = 1 if write else 0
self.putx([idx, ['%s: %s' % (rblob[0], "SHORT")]])
self.put_warn([self.ss_cmd, es], "Short transfer!")
self.reset()
return
# Don't care about anything else.
if ptype != 'DATA':
return
mosi, miso = data[1:]
if len(self.mosi_bytes) == 0:
self.ss_cmd = ss
self.mosi_bytes.append(mosi)
self.miso_bytes.append(miso)
# A transfer is 2-4 bytes, (command + 1..3 byte reg).
if len(self.mosi_bytes) < 2:
return
self.cmd = self.mosi_bytes[0]
write, reg = self.cmd & 0x80, self.cmd & 0x7f
rblob = regs.get(reg)
if not rblob:
# If you don't have CS, this will _destroy_ comms!
self.put_warn([self.ss_cmd, es], 'Unknown register!')
return
self.expected = math.ceil(rblob[3] / 8)
if len(self.mosi_bytes[1:]) != self.expected:
return
valo, vali = None, None
self.es_cmd = es
if self.expected == 3:
valo = self.mosi_bytes[1] << 16 | self.mosi_bytes[2] << 8 | \
self.mosi_bytes[3]
vali = self.miso_bytes[1] << 16 | self.miso_bytes[2] << 8 | \
self.miso_bytes[3]
elif self.expected == 2:
valo = self.mosi_bytes[1] << 8 | self.mosi_bytes[2]
vali = self.miso_bytes[1] << 8 | self.miso_bytes[2]
elif self.expected == 1:
valo = self.mosi_bytes[1]
vali = self.miso_bytes[1]
if write:
self.putx([1, ['%s: %#x' % (rblob[0], valo)]])
else:
self.putx([0, ['%s: %#x' % (rblob[0], vali)]])
self.reset()
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