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']
32 tags = ['IC', 'Wireless/RF']
34 ('sread', 'Short register read commands'),
35 ('swrite', 'Short register write commands'),
36 ('lread', 'Long register read commands'),
37 ('lwrite', 'Long register write commands'),
38 ('warning', 'Warnings'),
41 ('read', 'Read', (0, 2)),
42 ('write', 'Write', (1, 3)),
43 ('warnings', 'Warnings', (4,)),
50 self.ss_cmd, self.es_cmd = 0, 0
55 self.out_ann = self.register(srd.OUTPUT_ANN)
58 self.put(self.ss_cmd, self.es_cmd, self.out_ann, data)
60 def putw(self, pos, msg):
61 self.put(pos[0], pos[1], self.out_ann, [4, [msg]])
67 def handle_short(self):
68 write = self.mosi_bytes[0] & 0x1
69 reg = (self.mosi_bytes[0] >> 1) & 0x3f
70 reg_desc = sregs.get(reg, 'illegal')
72 self.putx([1, ['%s: %#x' % (reg_desc, self.mosi_bytes[1])]])
74 self.putx([0, ['%s: %#x' % (reg_desc, self.miso_bytes[1])]])
76 def handle_long(self):
77 dword = self.mosi_bytes[0] << 8 | self.mosi_bytes[1]
78 write = dword & (0x1 << 4)
79 reg = dword >> 5 & 0x3ff
81 reg_desc = 'TX:%#x' % reg
83 reg_desc = 'TX beacon:%#x' % reg
85 reg_desc = 'TX GTS1:%#x' % reg
87 reg_desc = 'TX GTS2:%#x' % reg
89 reg_desc = lregs.get(reg, 'illegal')
91 reg_desc = 'Security keys:%#x' % reg
93 reg_desc = 'Reserved:%#x' % reg
95 reg_desc = 'RX:%#x' % reg
98 self.putx([3, ['%s: %#x' % (reg_desc, self.mosi_bytes[2])]])
100 self.putx([2, ['%s: %#x' % (reg_desc, self.miso_bytes[2])]])
102 def decode(self, ss, es, data):
104 if ptype == 'CS-CHANGE':
105 # If we transition high mid-stream, toss out our data and restart.
106 cs_old, cs_new = data[1:]
107 if cs_old is not None and cs_old == 0 and cs_new == 1:
108 if len(self.mosi_bytes) not in (0, 2, 3):
109 self.putw([self.ss_cmd, es], 'Misplaced CS!')
113 # Don't care about anything else.
116 mosi, miso = data[1:]
118 self.ss, self.es = ss, es
120 if len(self.mosi_bytes) == 0:
122 self.mosi_bytes.append(mosi)
123 self.miso_bytes.append(miso)
125 # Everything is either 2 bytes or 3 bytes.
126 if len(self.mosi_bytes) < 2:
129 if self.mosi_bytes[0] & 0x80:
130 if len(self.mosi_bytes) == 3: