##
## This file is part of the libsigrokdecode project.
##
## Copyright (C) 2021 Quard <2014500726@smail.xtu.edu.cn>
##
## 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 .
##
import sigrokdecode as srd
class Decoder(srd.Decoder):
api_version = 3
id = 'eth_auto_negotiation'
name = 'ETH_AN'
longname = 'ETH Auto Negotiation'
desc = 'ETH Auto Negotiation protocol.'
license = 'gplv2+'
inputs = ['logic']
outputs = ['eth_an']
tags = ['PC']
channels = (
{'id': 'dp', 'name': 'TX+', 'desc': 'ETH TX+ signal'},
)
annotations = (
('data', 'FLP data'),
('format', 'format describe'),
('bitd', 'Bit desc'),
('bit', 'Bit'),
('NLP', 'Normal link pulses'),
)
annotation_rows = (
('data', 'Data', (0,)),
('format', 'Format', (1,)),
('bitd', 'Bit desc', (2,)),
('bit', 'Bit', (3,)),
('NLP', 'NLP', (4,)),
)
def __init__(self):
self.reset()
def reset(self):
self.ss = self.es = 0
self.pre_ss = self.pre_es = 0
self.last_vaild_ss = 0
self.samplerate = None
self.samplenum = 0
self.hex = 0
self.pre_hex = 0
self.index = 0
self.data_list = []
self.state = 'base page'
def start(self):
self.out_python = self.register(srd.OUTPUT_PYTHON)
self.out_ann = self.register(srd.OUTPUT_ANN)
self.out_binary = self.register(srd.OUTPUT_BINARY)
def metadata(self, key, value):
if key == srd.SRD_CONF_SAMPLERATE:
self.samplerate = value
def changeState(self):
if self.pre_hex != self.hex:
if self.state == 'base page':
if ((self.hex>>14)&0x3) == 0x3:
self.state = 'base page ack'
elif self.state == 'base page ack':
self.state = 'next page'
elif self.state == 'next page':
if ((self.hex>>14)&0x3) == 0x1:
self.state = 'next page ack'
elif self.state == 'next page ack':
self.state = 'base page'
def decodeTiming(self):
self.wait({0: 'r'})
self.ss = self.samplenum
self.wait({0: 'e'})
self.es = self.samplenum
length = float(self.es - self.ss)/self.samplerate
if length <= 1.0e-5 and length >= 1.0e-6: # 1us ~ 10us
self.put(self.ss, self.es, self.out_ann, [4, ['NLP']])
temp_length = self.ss - self.last_vaild_ss
length = float(temp_length)/self.samplerate
self.last_vaild_ss = self.ss
if length <= 7.0e-5 and length >= 6.0e-5: # 60us ~ 70us
self.hex = self.hex|0x1<= 1.2e-4: # 120us ~ 140us
self.data_list.append({'start':self.ss-(temp_length>>1),
'end':self.es-(temp_length>>1),
'Pre start':self.pre_ss,
'Pre end':self.pre_es})
self.index = self.index + 1
self.pre_ss = self.ss
self.pre_es = self.es
def decodeBasePage(self):
base_page_ta_dict = {
5:'10BaseT-HD',
6:'10BaseT-FD',
7:'100BaseTX-HD',
8:'100BaseTX-FD',
9:'100BaseT4',
10:'FC',
11:'AsyFC',
12:'Reserved',
13:'RF',
14:'ACK',
15:'NP',
}
if (self.hex&0x1f) == 0x1:
type_desc = '802.3'
elif (self.hex&0x1f) == 0x2:
type_desc = '802.9'
else:
type_desc = 'unknow'
for i in range(16):
self.put(self.data_list[i]['Pre start'],
self.data_list[i]['end'],
self.out_ann,
[3, [str(hex(((self.hex>>i)&0x1)))]])
if i in base_page_ta_dict.keys():
self.put(self.data_list[i]['Pre start'],
self.data_list[i]['end'],
self.out_ann,
[2, [base_page_ta_dict[i]]])
self.put(self.data_list[0]['Pre start'],
self.data_list[15]['end'],
self.out_ann,
[0, ["base page:"+str(hex(self.hex))]])
self.put(self.data_list[0]['Pre start'],
self.data_list[4]['end'],
self.out_ann,
[1, ["Selector field:"+str(hex(self.hex&0x1f))]])
self.put(self.data_list[0]['Pre start'],
self.data_list[4]['end'],
self.out_ann,
[2, [type_desc]])
self.put(self.data_list[5]['Pre start'],
self.data_list[12]['end'],
self.out_ann,
[1, ["Technology ability field:"+str(hex(((self.hex>>5)&0xff)))]])
self.put(self.data_list[13]['Pre start'],
self.data_list[15]['end'],
self.out_ann,
[1, ["Other fields:"+str(hex(((self.hex>>13)&0x7)))]])
def decodeNextPage(self):
next_page_ta_dict = {
0:'1000BaseT M/S CFG EN',
1:'1000BaseT M/S CFG Vale',
2:'Port type',
3:'1000BaseT-FD',
4:'1000BaseT-HD',
5:'10GBaseT-FD',
6:'10GBaseT M/S CFG EN',
7:'10GBaseT M/S CFG Vale',
8:'Reserved',
9:'Reserved',
10:'Reserved',
}
next_page_ot_dict = {
11:'T',
12:'ACK2',
13:'MP',
14:'ACK',
15:'NP',
}
if ((self.hex>>13)&0x1) == 0x1:
mp = "Technology ability field:"
else :
mp = "Unformatted code field:"
for i in range(16):
self.put(self.data_list[i]['Pre start'],
self.data_list[i]['end'],
self.out_ann,
[3, [str(hex(((self.hex>>i)&0x1)))]])
if i in next_page_ot_dict.keys():
self.put(self.data_list[i]['Pre start'],
self.data_list[i]['end'],
self.out_ann,
[2, [next_page_ot_dict[i]]])
if mp == "Technology ability field:":
if i in next_page_ta_dict.keys():
self.put(self.data_list[i]['Pre start'],
self.data_list[i]['end'],
self.out_ann,
[2, [next_page_ta_dict[i]]])
self.put(self.data_list[0]['Pre start'],
self.data_list[15]['end'],
self.out_ann,
[0, ["next page:"+str(hex(self.hex))]])
self.put(self.data_list[0]['Pre start'],
self.data_list[10]['end'],
self.out_ann,
[1, [mp+str(hex((self.hex&0x7ff)))]])
if mp == "Unformatted code field:":
self.put(self.data_list[0]['Pre start'],
self.data_list[10]['end'],
self.out_ann,
[2, ["Master-Slave seed value (MSB)"]])
self.put(self.data_list[11]['Pre start'],
self.data_list[15]['end'],
self.out_ann,
[1, ["Other fields:"+str(hex(((self.hex>>11)&0x1f)))]])
def updateOnceDecode(self):
self.pre_hex = self.hex
self.data_list = []
self.index = 0
self.hex = 0
def decode(self):
while True:
self.decodeTiming()
if self.index == 16:
self.changeState()
if self.state == 'base page' or self.state == 'base page ack':
self.decodeBasePage()
elif self.state == 'next page' or self.state == 'next page ack':
self.decodeNextPage()
self.updateOnceDecode()