]>
Commit | Line | Data |
---|---|---|
3bd76451 | 1 | ## |
50bd5d25 | 2 | ## This file is part of the libsigrokdecode project. |
3bd76451 | 3 | ## |
ad30cb46 | 4 | ## Copyright (C) 2012-2014 Uwe Hermann <uwe@hermann-uwe.de> |
3bd76451 UH |
5 | ## |
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. | |
10 | ## | |
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. | |
15 | ## | |
16 | ## You should have received a copy of the GNU General Public License | |
4539e9ca | 17 | ## along with this program; if not, see <http://www.gnu.org/licenses/>. |
3bd76451 UH |
18 | ## |
19 | ||
3bd76451 | 20 | import sigrokdecode as srd |
77adad94 | 21 | from .parts import * |
3bd76451 | 22 | |
f5250c60 HK |
23 | class Ann: |
24 | PE, RSB0, RSB1, RSB2, CE, RFB, RHFB, REFB, \ | |
25 | WARN, DEV, = range(10) | |
26 | ||
3bd76451 UH |
27 | VENDOR_CODE_ATMEL = 0x1e |
28 | ||
29 | class Decoder(srd.Decoder): | |
b197383c | 30 | api_version = 3 |
3bd76451 UH |
31 | id = 'avr_isp' |
32 | name = 'AVR ISP' | |
d523eae6 | 33 | longname = 'AVR In-System Programming' |
2787cf2a | 34 | desc = 'Atmel AVR In-System Programming (ISP) protocol.' |
3bd76451 | 35 | license = 'gplv2+' |
4e4f8527 | 36 | inputs = ['spi'] |
6cbba91f | 37 | outputs = [] |
d6d8a8a4 | 38 | tags = ['Debug/trace'] |
da9bcbd9 BV |
39 | annotations = ( |
40 | ('pe', 'Programming enable'), | |
41 | ('rsb0', 'Read signature byte 0'), | |
42 | ('rsb1', 'Read signature byte 1'), | |
43 | ('rsb2', 'Read signature byte 2'), | |
44 | ('ce', 'Chip erase'), | |
45 | ('rfb', 'Read fuse bits'), | |
46 | ('rhfb', 'Read high fuse bits'), | |
47 | ('refb', 'Read extended fuse bits'), | |
e144452b | 48 | ('warning', 'Warning'), |
da9bcbd9 BV |
49 | ('dev', 'Device'), |
50 | ) | |
3b001341 UH |
51 | annotation_rows = ( |
52 | ('bits', 'Bits', ()), | |
f5250c60 HK |
53 | ('commands', 'Commands', (Ann.PE, Ann.RSB0, Ann.RSB1, Ann.RSB2, |
54 | Ann.CE, Ann.RFB, Ann.RHFB, Ann.REFB,)), | |
55 | ('warnings', 'Warnings', (Ann.WARN,)), | |
56 | ('devs', 'Devices', (Ann.DEV,)), | |
3b001341 | 57 | ) |
3bd76451 | 58 | |
92b7b49f | 59 | def __init__(self): |
10aeb8ea GS |
60 | self.reset() |
61 | ||
62 | def reset(self): | |
3bd76451 UH |
63 | self.state = 'IDLE' |
64 | self.mosi_bytes, self.miso_bytes = [], [] | |
486b19ce | 65 | self.ss_cmd, self.es_cmd = 0, 0 |
3bd76451 | 66 | self.xx, self.yy, self.zz, self.mm = 0, 0, 0, 0 |
486b19ce | 67 | self.ss_device = None |
3bd76451 | 68 | |
8915b346 | 69 | def start(self): |
be465111 | 70 | self.out_ann = self.register(srd.OUTPUT_ANN) |
3bd76451 | 71 | |
3bd76451 | 72 | def putx(self, data): |
486b19ce | 73 | self.put(self.ss_cmd, self.es_cmd, self.out_ann, data) |
3bd76451 UH |
74 | |
75 | def handle_cmd_programming_enable(self, cmd, ret): | |
76 | # Programming enable. | |
77 | # Note: The chip doesn't send any ACK for 'Programming enable'. | |
f5250c60 | 78 | self.putx([Ann.PE, ['Programming enable']]) |
3bd76451 UH |
79 | |
80 | # Sanity check on reply. | |
81 | if ret[1:4] != [0xac, 0x53, cmd[2]]: | |
f5250c60 | 82 | self.putx([Ann.WARN, ['Warning: Unexpected bytes in reply!']]) |
3bd76451 UH |
83 | |
84 | def handle_cmd_read_signature_byte_0x00(self, cmd, ret): | |
85 | # Signature byte 0x00: vendor code. | |
86 | self.vendor_code = ret[3] | |
87 | v = vendor_code[self.vendor_code] | |
f5250c60 | 88 | self.putx([Ann.RSB0, ['Vendor code: 0x%02x (%s)' % (ret[3], v)]]) |
3bd76451 UH |
89 | |
90 | # Store for later. | |
91 | self.xx = cmd[1] # Same as ret[2]. | |
92 | self.yy = cmd[3] | |
93 | self.zz = ret[0] | |
94 | ||
95 | # Sanity check on reply. | |
96 | if ret[1] != 0x30 or ret[2] != cmd[1]: | |
f5250c60 | 97 | self.putx([Ann.WARN, ['Warning: Unexpected bytes in reply!']]) |
3bd76451 UH |
98 | |
99 | # Sanity check for the vendor code. | |
100 | if self.vendor_code != VENDOR_CODE_ATMEL: | |
f5250c60 | 101 | self.putx([Ann.WARN, ['Warning: Vendor code was not 0x1e (Atmel)!']]) |
3bd76451 UH |
102 | |
103 | def handle_cmd_read_signature_byte_0x01(self, cmd, ret): | |
104 | # Signature byte 0x01: part family and memory size. | |
105 | self.part_fam_flash_size = ret[3] | |
f5250c60 | 106 | self.putx([Ann.RSB1, ['Part family / memory size: 0x%02x' % ret[3]]]) |
3bd76451 UH |
107 | |
108 | # Store for later. | |
109 | self.mm = cmd[3] | |
486b19ce | 110 | self.ss_device = self.ss_cmd |
3bd76451 UH |
111 | |
112 | # Sanity check on reply. | |
113 | if ret[1] != 0x30 or ret[2] != cmd[1] or ret[0] != self.yy: | |
f5250c60 | 114 | self.putx([Ann.WARN, ['Warning: Unexpected bytes in reply!']]) |
3bd76451 UH |
115 | |
116 | def handle_cmd_read_signature_byte_0x02(self, cmd, ret): | |
117 | # Signature byte 0x02: part number. | |
118 | self.part_number = ret[3] | |
f5250c60 | 119 | self.putx([Ann.RSB2, ['Part number: 0x%02x' % ret[3]]]) |
3bd76451 | 120 | |
3bd76451 | 121 | p = part[(self.part_fam_flash_size, self.part_number)] |
f5250c60 | 122 | data = [Ann.DEV, ['Device: Atmel %s' % p]] |
486b19ce | 123 | self.put(self.ss_device, self.es_cmd, self.out_ann, data) |
3bd76451 UH |
124 | |
125 | # Sanity check on reply. | |
126 | if ret[1] != 0x30 or ret[2] != self.xx or ret[0] != self.mm: | |
f5250c60 | 127 | self.putx([Ann.WARN, ['Warning: Unexpected bytes in reply!']]) |
3bd76451 UH |
128 | |
129 | self.xx, self.yy, self.zz, self.mm = 0, 0, 0, 0 | |
130 | ||
131 | def handle_cmd_chip_erase(self, cmd, ret): | |
1fd698dc UH |
132 | # Chip erase (erases both flash an EEPROM). |
133 | # Upon successful chip erase, the lock bits will also be erased. | |
134 | # The only way to end a Chip Erase cycle is to release RESET#. | |
f5250c60 | 135 | self.putx([Ann.CE, ['Chip erase']]) |
3bd76451 | 136 | |
1fd698dc UH |
137 | # TODO: Check/handle RESET#. |
138 | ||
139 | # Sanity check on reply. | |
140 | bit = (ret[2] & (1 << 7)) >> 7 | |
141 | if ret[1] != 0xac or bit != 1 or ret[3] != cmd[2]: | |
f5250c60 | 142 | self.putx([Ann.WARN, ['Warning: Unexpected bytes in reply!']]) |
1fd698dc | 143 | |
3bd76451 UH |
144 | def handle_cmd_read_fuse_bits(self, cmd, ret): |
145 | # Read fuse bits. | |
f5250c60 | 146 | self.putx([Ann.RFB, ['Read fuse bits: 0x%02x' % ret[3]]]) |
3bd76451 UH |
147 | |
148 | # TODO: Decode fuse bits. | |
149 | # TODO: Sanity check on reply. | |
150 | ||
151 | def handle_cmd_read_fuse_high_bits(self, cmd, ret): | |
152 | # Read fuse high bits. | |
f5250c60 | 153 | self.putx([Ann.RHFB, ['Read fuse high bits: 0x%02x' % ret[3]]]) |
3bd76451 UH |
154 | |
155 | # TODO: Decode fuse bits. | |
156 | # TODO: Sanity check on reply. | |
157 | ||
158 | def handle_cmd_read_extended_fuse_bits(self, cmd, ret): | |
159 | # Read extended fuse bits. | |
f5250c60 | 160 | self.putx([Ann.REFB, ['Read extended fuse bits: 0x%02x' % ret[3]]]) |
3bd76451 UH |
161 | |
162 | # TODO: Decode fuse bits. | |
163 | # TODO: Sanity check on reply. | |
164 | ||
165 | def handle_command(self, cmd, ret): | |
166 | if cmd[:2] == [0xac, 0x53]: | |
167 | self.handle_cmd_programming_enable(cmd, ret) | |
168 | elif cmd[0] == 0xac and (cmd[1] & (1 << 7)) == (1 << 7): | |
169 | self.handle_cmd_chip_erase(cmd, ret) | |
170 | elif cmd[:3] == [0x50, 0x00, 0x00]: | |
171 | self.handle_cmd_read_fuse_bits(cmd, ret) | |
172 | elif cmd[:3] == [0x58, 0x08, 0x00]: | |
173 | self.handle_cmd_read_fuse_high_bits(cmd, ret) | |
174 | elif cmd[:3] == [0x50, 0x08, 0x00]: | |
175 | self.handle_cmd_read_extended_fuse_bits(cmd, ret) | |
176 | elif cmd[0] == 0x30 and cmd[2] == 0x00: | |
177 | self.handle_cmd_read_signature_byte_0x00(cmd, ret) | |
178 | elif cmd[0] == 0x30 and cmd[2] == 0x01: | |
179 | self.handle_cmd_read_signature_byte_0x01(cmd, ret) | |
180 | elif cmd[0] == 0x30 and cmd[2] == 0x02: | |
181 | self.handle_cmd_read_signature_byte_0x02(cmd, ret) | |
182 | else: | |
183 | c = '%02x %02x %02x %02x' % tuple(cmd) | |
184 | r = '%02x %02x %02x %02x' % tuple(ret) | |
f5250c60 | 185 | self.putx([Ann.PE, ['Unknown command: %s (reply: %s)!' % (c, r)]]) |
3bd76451 UH |
186 | |
187 | def decode(self, ss, es, data): | |
188 | ptype, mosi, miso = data | |
189 | ||
ad30cb46 UH |
190 | # For now, only use DATA and BITS packets. |
191 | if ptype not in ('DATA', 'BITS'): | |
3bd76451 UH |
192 | return |
193 | ||
ad30cb46 UH |
194 | # Store the individual bit values and ss/es numbers. The next packet |
195 | # is guaranteed to be a 'DATA' packet belonging to this 'BITS' one. | |
196 | if ptype == 'BITS': | |
197 | self.miso_bits, self.mosi_bits = miso, mosi | |
198 | return | |
3bd76451 UH |
199 | |
200 | self.ss, self.es = ss, es | |
201 | ||
011ed1a3 | 202 | if len(self.mosi_bytes) == 0: |
486b19ce | 203 | self.ss_cmd = ss |
011ed1a3 | 204 | |
3bd76451 UH |
205 | # Append new bytes. |
206 | self.mosi_bytes.append(mosi) | |
207 | self.miso_bytes.append(miso) | |
208 | ||
3bd76451 UH |
209 | # All commands consist of 4 bytes. |
210 | if len(self.mosi_bytes) < 4: | |
211 | return | |
212 | ||
486b19ce | 213 | self.es_cmd = es |
3bd76451 UH |
214 | |
215 | self.handle_command(self.mosi_bytes, self.miso_bytes) | |
216 | ||
217 | self.mosi_bytes = [] | |
218 | self.miso_bytes = [] |