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,)),
49 self.ss_cmd, self.es_cmd = 0, 0
54 self.out_ann = self.register(srd.OUTPUT_ANN)
57 self.put(self.ss_cmd, self.es_cmd, self.out_ann, data)
59 def putw(self, pos, msg):
60 self.put(pos[0], pos[1], self.out_ann, [4, [msg]])
66 def handle_short(self):
67 write = self.mosi_bytes[0] & 0x1
68 reg = (self.mosi_bytes[0] >> 1) & 0x3f
69 reg_desc = sregs.get(reg, 'illegal')
71 self.putx([1, ['%s: %#x' % (reg_desc, self.mosi_bytes[1])]])
73 self.putx([0, ['%s: %#x' % (reg_desc, self.miso_bytes[1])]])
75 def handle_long(self):
76 dword = self.mosi_bytes[0] << 8 | self.mosi_bytes[1]
77 write = dword & (0x1 << 4)
78 reg = dword >> 5 & 0x3ff
80 reg_desc = 'TX:%#x' % reg
82 reg_desc = 'TX beacon:%#x' % reg
84 reg_desc = 'TX GTS1:%#x' % reg
86 reg_desc = 'TX GTS2:%#x' % reg
88 reg_desc = lregs.get(reg, 'illegal')
90 reg_desc = 'Security keys:%#x' % reg
92 reg_desc = 'Reserved:%#x' % reg
94 reg_desc = 'RX:%#x' % reg
97 self.putx([3, ['%s: %#x' % (reg_desc, self.mosi_bytes[2])]])
99 self.putx([2, ['%s: %#x' % (reg_desc, self.miso_bytes[2])]])
101 def decode(self, ss, es, data):
103 if ptype == 'CS-CHANGE':
104 # If we transition high mid-stream, toss out our data and restart.
105 cs_old, cs_new = data[1:]
106 if cs_old is not None and cs_old == 0 and cs_new == 1:
107 if len(self.mosi_bytes) not in (0, 2, 3):
108 self.putw([self.ss_cmd, es], 'Misplaced CS!')
112 # Don't care about anything else.
115 mosi, miso = data[1:]
117 self.ss, self.es = ss, es
119 if len(self.mosi_bytes) == 0:
121 self.mosi_bytes.append(mosi)
122 self.miso_bytes.append(miso)
124 # Everything is either 2 bytes or 3 bytes.
125 if len(self.mosi_bytes) < 2:
128 if self.mosi_bytes[0] & 0x80:
129 if len(self.mosi_bytes) == 3: