2 ## This file is part of the libsigrokdecode project.
4 ## Copyright (C) 2015 Karl Palsson <karlp@tweak.net.au>
6 ## This program is free software; you can redistribute it and/or modify
7 ## it under the terms of the GNU General Public License as published by
8 ## the Free Software Foundation; either version 2 of the License, or
9 ## (at your option) any later version.
11 ## This program is distributed in the hope that it will be useful,
12 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ## GNU General Public License for more details.
16 ## You should have received a copy of the GNU General Public License
17 ## along with this program; if not, see <http://www.gnu.org/licenses/>.
20 import sigrokdecode as srd
23 class Decoder(srd.Decoder):
27 longname = 'Microchip MRF24J40'
28 desc = 'IEEE 802.15.4 2.4 GHz RF tranceiver chip.'
31 outputs = ['mrf24j40']
33 ('sread', 'Short register read commands'),
34 ('swrite', 'Short register write commands'),
35 ('lread', 'Long register read commands'),
36 ('lwrite', 'Long register write commands'),
37 ('warning', 'Warnings'),
40 ('read', 'Read', (0, 2)),
41 ('write', 'Write', (1, 3)),
42 ('warnings', 'Warnings', (4,)),
46 self.ss_cmd, self.es_cmd = 0, 0
51 self.out_ann = self.register(srd.OUTPUT_ANN)
54 self.put(self.ss_cmd, self.es_cmd, self.out_ann, data)
56 def putw(self, pos, msg):
57 self.put(pos[0], pos[1], self.out_ann, [4, [msg]])
63 def handle_short(self):
64 write = self.mosi_bytes[0] & 0x1
65 reg = (self.mosi_bytes[0] >> 1) & 0x3f
66 reg_desc = sregs.get(reg, 'illegal')
68 self.putx([1, ['%s: %#x' % (reg_desc, self.mosi_bytes[1])]])
70 self.putx([0, ['%s: %#x' % (reg_desc, self.miso_bytes[1])]])
72 def handle_long(self):
73 dword = self.mosi_bytes[0] << 8 | self.mosi_bytes[1]
74 write = dword & (0x1 << 4)
75 reg = dword >> 5 & 0x3ff
77 reg_desc = 'TX:%#x' % reg
79 reg_desc = 'TX beacon:%#x' % reg
81 reg_desc = 'TX GTS1:%#x' % reg
83 reg_desc = 'TX GTS2:%#x' % reg
85 reg_desc = lregs.get(reg, 'illegal')
87 reg_desc = 'Security keys:%#x' % reg
89 reg_desc = 'Reserved:%#x' % reg
91 reg_desc = 'RX:%#x' % reg
94 self.putx([3, ['%s: %#x' % (reg_desc, self.mosi_bytes[2])]])
96 self.putx([2, ['%s: %#x' % (reg_desc, self.miso_bytes[2])]])
98 def decode(self, ss, es, data):
100 if ptype == 'CS-CHANGE':
101 # If we transition high mid-stream, toss out our data and restart.
102 cs_old, cs_new = data[1:]
103 if cs_old is not None and cs_old == 0 and cs_new == 1:
104 if len(self.mosi_bytes) not in (0, 2, 3):
105 self.putw([self.ss_cmd, es], 'Misplaced CS!')
109 # Don't care about anything else.
112 mosi, miso = data[1:]
114 self.ss, self.es = ss, es
116 if len(self.mosi_bytes) == 0:
118 self.mosi_bytes.append(mosi)
119 self.miso_bytes.append(miso)
121 # Everything is either 2 bytes or 3 bytes.
122 if len(self.mosi_bytes) < 2:
125 if self.mosi_bytes[0] & 0x80:
126 if len(self.mosi_bytes) == 3: