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1b1c914f | 1 | ## |
50bd5d25 | 2 | ## This file is part of the libsigrokdecode project. |
1b1c914f | 3 | ## |
3ca1f1b3 | 4 | ## Copyright (C) 2011-2015 Uwe Hermann <uwe@hermann-uwe.de> |
1b1c914f 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 | |
17 | ## along with this program; if not, write to the Free Software | |
18 | ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | ## | |
20 | ||
677d597b | 21 | import sigrokdecode as srd |
c2446117 | 22 | from .lists import * |
1b1c914f | 23 | |
9389f2c1 | 24 | def cmd_annotation_classes(): |
da9bcbd9 | 25 | return tuple([tuple([cmd[0].lower(), cmd[1]]) for cmd in cmds.values()]) |
9389f2c1 | 26 | |
10d3c8dc AG |
27 | def decode_dual_bytes(sio0, sio1): |
28 | # Given a byte in SIO0 (MOSI) of even bits and a byte in | |
29 | # SIO1 (MISO) of odd bits, return a tuple of two bytes. | |
30 | def combine_byte(even, odd): | |
31 | result = 0 | |
32 | for bit in range(4): | |
33 | if even & (1 << bit): | |
34 | result |= 1 << (bit*2) | |
35 | if odd & (1 << bit): | |
36 | result |= 1 << ((bit*2) + 1) | |
37 | return result | |
38 | return (combine_byte(sio0 >> 4, sio1 >> 4), combine_byte(sio0, sio1)) | |
39 | ||
7cfbf663 UH |
40 | def decode_status_reg(data): |
41 | # TODO: Additional per-bit(s) self.put() calls with correct start/end. | |
42 | ||
43 | # Bits[0:0]: WIP (write in progress) | |
44 | s = 'W' if (data & (1 << 0)) else 'No w' | |
45 | ret = '%srite operation in progress.\n' % s | |
46 | ||
47 | # Bits[1:1]: WEL (write enable latch) | |
48 | s = '' if (data & (1 << 1)) else 'not ' | |
49 | ret += 'Internal write enable latch is %sset.\n' % s | |
50 | ||
51 | # Bits[5:2]: Block protect bits | |
52 | # TODO: More detailed decoding (chip-dependent). | |
53 | ret += 'Block protection bits (BP3-BP0): 0x%x.\n' % ((data & 0x3c) >> 2) | |
54 | ||
55 | # Bits[6:6]: Continuously program mode (CP mode) | |
56 | s = '' if (data & (1 << 6)) else 'not ' | |
57 | ret += 'Device is %sin continuously program mode (CP mode).\n' % s | |
58 | ||
59 | # Bits[7:7]: SRWD (status register write disable) | |
cd287c56 | 60 | s = 'not ' if (data & (1 << 7)) else '' |
7cfbf663 UH |
61 | ret += 'Status register writes are %sallowed.\n' % s |
62 | ||
63 | return ret | |
64 | ||
677d597b | 65 | class Decoder(srd.Decoder): |
12851357 | 66 | api_version = 2 |
3ca1f1b3 UH |
67 | id = 'spiflash' |
68 | name = 'SPI flash' | |
69 | longname = 'SPI flash chips' | |
70 | desc = 'xx25 series SPI (NOR) flash chip protocol.' | |
1b1c914f | 71 | license = 'gplv2+' |
a1497fa3 | 72 | inputs = ['spi'] |
3ca1f1b3 | 73 | outputs = ['spiflash'] |
da9bcbd9 BV |
74 | annotations = cmd_annotation_classes() + ( |
75 | ('bits', 'Bits'), | |
76 | ('bits2', 'Bits2'), | |
77 | ('warnings', 'Warnings'), | |
78 | ) | |
9ed42038 UH |
79 | annotation_rows = ( |
80 | ('bits', 'Bits', (24, 25)), | |
81 | ('commands', 'Commands', tuple(range(23 + 1))), | |
82 | ('warnings', 'Warnings', (26,)), | |
83 | ) | |
c2446117 UH |
84 | options = ( |
85 | {'id': 'chip', 'desc': 'Chip', 'default': tuple(chips.keys())[0], | |
86 | 'values': tuple(chips.keys())}, | |
b33a73bc UH |
87 | {'id': 'format', 'desc': 'Data format', 'default': 'hex', |
88 | 'values': ('hex', 'ascii')}, | |
c2446117 | 89 | ) |
1b1c914f | 90 | |
92b7b49f | 91 | def __init__(self): |
db188228 | 92 | self.device_id = -1 |
2c920167 AG |
93 | self.on_end_transaction = None |
94 | self.end_current_transaction() | |
95 | ||
1ec9c5e2 AG |
96 | # Build dict mapping command keys to handler functions. Each |
97 | # command in 'cmds' (defined in lists.py) has a matching | |
98 | # handler self.handle_<shortname>. | |
99 | def get_handler(cmd): | |
100 | s = 'handle_%s' % cmds[cmd][0].lower().replace('/', '_') | |
101 | return getattr(self, s) | |
102 | self.cmd_handlers = dict((cmd, get_handler(cmd)) for cmd in cmds.keys()) | |
103 | ||
2c920167 AG |
104 | def end_current_transaction(self): |
105 | if self.on_end_transaction is not None: # Callback for CS# transition. | |
106 | self.on_end_transaction() | |
107 | self.on_end_transaction = None | |
4772a846 | 108 | self.state = None |
781ef945 | 109 | self.cmdstate = 1 |
e4022299 UH |
110 | self.addr = 0 |
111 | self.data = [] | |
1b1c914f | 112 | |
8915b346 | 113 | def start(self): |
be465111 | 114 | self.out_ann = self.register(srd.OUTPUT_ANN) |
c2446117 | 115 | self.chip = chips[self.options['chip']] |
db188228 | 116 | self.vendor = self.options['chip'].split('_')[0] |
1b1c914f | 117 | |
385508e9 | 118 | def putx(self, data): |
ee3e279c | 119 | # Simplification, most annotations span exactly one SPI byte/packet. |
9b4d8a57 UH |
120 | self.put(self.ss, self.es, self.out_ann, data) |
121 | ||
7c139a54 | 122 | def putb(self, data): |
5b0b88ce | 123 | self.put(self.ss_block, self.es_block, self.out_ann, data) |
7c139a54 | 124 | |
db188228 UH |
125 | def vendor_device(self): |
126 | dev = device_name[self.vendor].get(self.device_id, 'Unknown') | |
127 | return '%s %s' % (self.chip['vendor'], dev) | |
128 | ||
9b4d8a57 | 129 | def handle_wren(self, mosi, miso): |
781ef945 | 130 | self.putx([0, ['Command: %s' % cmds[self.state][1]]]) |
4772a846 | 131 | self.state = None |
1b1c914f | 132 | |
b54936a9 UH |
133 | def handle_wrdi(self, mosi, miso): |
134 | pass # TODO | |
135 | ||
1b1c914f | 136 | # TODO: Check/display device ID / name |
9b4d8a57 | 137 | def handle_rdid(self, mosi, miso): |
1b1c914f UH |
138 | if self.cmdstate == 1: |
139 | # Byte 1: Master sends command ID. | |
486b19ce | 140 | self.ss_block = self.ss |
9389f2c1 | 141 | self.putx([2, ['Command: %s' % cmds[self.state][1]]]) |
1b1c914f UH |
142 | elif self.cmdstate == 2: |
143 | # Byte 2: Slave sends the JEDEC manufacturer ID. | |
9389f2c1 | 144 | self.putx([2, ['Manufacturer ID: 0x%02x' % miso]]) |
1b1c914f UH |
145 | elif self.cmdstate == 3: |
146 | # Byte 3: Slave sends the memory type (0x20 for this chip). | |
9389f2c1 | 147 | self.putx([2, ['Memory type: 0x%02x' % miso]]) |
1b1c914f UH |
148 | elif self.cmdstate == 4: |
149 | # Byte 4: Slave sends the device ID. | |
9b4d8a57 | 150 | self.device_id = miso |
9389f2c1 | 151 | self.putx([2, ['Device ID: 0x%02x' % miso]]) |
1b1c914f UH |
152 | |
153 | if self.cmdstate == 4: | |
1b1c914f | 154 | # TODO: Same device ID? Check! |
db188228 | 155 | d = 'Device: %s' % self.vendor_device() |
486b19ce | 156 | self.put(self.ss_block, self.es, self.out_ann, [0, [d]]) |
4772a846 | 157 | self.state = None |
1b1c914f UH |
158 | else: |
159 | self.cmdstate += 1 | |
160 | ||
b54936a9 UH |
161 | def handle_rdsr(self, mosi, miso): |
162 | # Read status register: Master asserts CS#, sends RDSR command, | |
163 | # reads status register byte. If CS# is kept asserted, the status | |
164 | # register can be read continuously / multiple times in a row. | |
165 | # When done, the master de-asserts CS# again. | |
166 | if self.cmdstate == 1: | |
167 | # Byte 1: Master sends command ID. | |
9389f2c1 | 168 | self.putx([3, ['Command: %s' % cmds[self.state][1]]]) |
b54936a9 UH |
169 | elif self.cmdstate >= 2: |
170 | # Bytes 2-x: Slave sends status register as long as master clocks. | |
2c920167 AG |
171 | self.putx([24, ['Status register: 0x%02x' % miso]]) |
172 | self.putx([25, [decode_status_reg(miso)]]) | |
b54936a9 UH |
173 | |
174 | self.cmdstate += 1 | |
175 | ||
6ccb64fe UH |
176 | def handle_rdsr2(self, mosi, miso): |
177 | # Read status register 2: Master asserts CS#, sends RDSR2 command, | |
178 | # reads status register 2 byte. If CS# is kept asserted, the status | |
179 | # register 2 can be read continuously / multiple times in a row. | |
180 | # When done, the master de-asserts CS# again. | |
181 | if self.cmdstate == 1: | |
182 | # Byte 1: Master sends command ID. | |
183 | self.putx([3, ['Command: %s' % cmds[self.state][1]]]) | |
184 | elif self.cmdstate >= 2: | |
185 | # Bytes 2-x: Slave sends status register 2 as long as master clocks. | |
186 | self.putx([24, ['Status register 2: 0x%02x' % miso]]) | |
187 | self.putx([25, [decode_status_reg(miso)]]) | |
188 | # TODO: Handle status register 2 correctly. | |
189 | ||
190 | self.cmdstate += 1 | |
191 | ||
b54936a9 | 192 | def handle_wrsr(self, mosi, miso): |
0a89f2ae UH |
193 | # Write status register: Master asserts CS#, sends WRSR command, |
194 | # writes 1 or 2 status register byte(s). | |
195 | # When done, the master de-asserts CS# again. If this doesn't happen | |
196 | # the WRSR command will not be executed. | |
197 | if self.cmdstate == 1: | |
198 | # Byte 1: Master sends command ID. | |
199 | self.putx([3, ['Command: %s' % cmds[self.state][1]]]) | |
200 | elif self.cmdstate in (2, 3): | |
201 | # Bytes 2 and/or 3: Master sends status register byte(s). | |
202 | self.putx([24, ['Status register: 0x%02x' % miso]]) | |
203 | self.putx([25, [decode_status_reg(miso)]]) | |
204 | # TODO: Handle status register 2 correctly. | |
205 | ||
206 | self.cmdstate += 1 | |
b54936a9 UH |
207 | |
208 | def handle_read(self, mosi, miso): | |
209 | # Read data bytes: Master asserts CS#, sends READ command, sends | |
210 | # 3-byte address, reads >= 1 data bytes, de-asserts CS#. | |
211 | if self.cmdstate == 1: | |
212 | # Byte 1: Master sends command ID. | |
9389f2c1 | 213 | self.putx([5, ['Command: %s' % cmds[self.state][1]]]) |
b54936a9 UH |
214 | elif self.cmdstate in (2, 3, 4): |
215 | # Bytes 2/3/4: Master sends read address (24bits, MSB-first). | |
216 | self.addr |= (mosi << ((4 - self.cmdstate) * 8)) | |
217 | # self.putx([0, ['Read address, byte %d: 0x%02x' % \ | |
218 | # (4 - self.cmdstate, mosi)]]) | |
219 | if self.cmdstate == 4: | |
9389f2c1 | 220 | self.putx([24, ['Read address: 0x%06x' % self.addr]]) |
b54936a9 UH |
221 | self.addr = 0 |
222 | elif self.cmdstate >= 5: | |
223 | # Bytes 5-x: Master reads data bytes (until CS# de-asserted). | |
2c920167 AG |
224 | if self.cmdstate == 5: |
225 | self.ss_block = self.ss | |
226 | self.on_end_transaction = lambda: self.output_data_block('Read') | |
227 | self.data.append(miso) | |
b54936a9 UH |
228 | |
229 | self.cmdstate += 1 | |
230 | ||
231 | def handle_fast_read(self, mosi, miso): | |
7c139a54 UH |
232 | # Fast read: Master asserts CS#, sends FAST READ command, sends |
233 | # 3-byte address + 1 dummy byte, reads >= 1 data bytes, de-asserts CS#. | |
234 | if self.cmdstate == 1: | |
235 | # Byte 1: Master sends command ID. | |
236 | self.putx([5, ['Command: %s' % cmds[self.state][1]]]) | |
237 | elif self.cmdstate in (2, 3, 4): | |
238 | # Bytes 2/3/4: Master sends read address (24bits, MSB-first). | |
239 | self.putx([24, ['AD%d: 0x%02x' % (self.cmdstate - 1, mosi)]]) | |
240 | if self.cmdstate == 2: | |
5b0b88ce | 241 | self.ss_block = self.ss |
7c139a54 UH |
242 | self.addr |= (mosi << ((4 - self.cmdstate) * 8)) |
243 | elif self.cmdstate == 5: | |
244 | self.putx([24, ['Dummy byte: 0x%02x' % mosi]]) | |
5b0b88ce | 245 | self.es_block = self.es |
7c139a54 UH |
246 | self.putb([5, ['Read address: 0x%06x' % self.addr]]) |
247 | self.addr = 0 | |
248 | elif self.cmdstate >= 6: | |
249 | # Bytes 6-x: Master reads data bytes (until CS# de-asserted). | |
7c139a54 | 250 | if self.cmdstate == 6: |
5b0b88ce | 251 | self.ss_block = self.ss |
10d3c8dc | 252 | self.on_end_transaction = lambda: self.output_data_block('Read') |
2c920167 | 253 | self.data.append(miso) |
7c139a54 UH |
254 | |
255 | self.cmdstate += 1 | |
b54936a9 UH |
256 | |
257 | def handle_2read(self, mosi, miso): | |
10d3c8dc AG |
258 | # Fast read dual I/O: Same as fast read, but all data |
259 | # after the command is sent via two I/O pins. | |
260 | # MOSI = SIO0 = even bits, MISO = SIO1 = odd bits. | |
261 | # Recombine the bytes and pass them up to the handle_fast_read command. | |
262 | if self.cmdstate == 1: | |
263 | # Byte 1: Master sends command ID. | |
264 | self.putx([5, ['Command: %s' % cmds[self.state][1]]]) | |
265 | self.cmdstate = 2 | |
266 | else: | |
267 | # Dual I/O mode. | |
268 | a, b = decode_dual_bytes(mosi, miso) | |
269 | # Pass same byte in as both MISO & MOSI, parser state determines | |
270 | # which one it cares about. | |
271 | self.handle_fast_read(a, a) | |
272 | self.handle_fast_read(b, b) | |
b54936a9 | 273 | |
1b1c914f UH |
274 | # TODO: Warn/abort if we don't see the necessary amount of bytes. |
275 | # TODO: Warn if WREN was not seen before. | |
9b4d8a57 | 276 | def handle_se(self, mosi, miso): |
1b1c914f UH |
277 | if self.cmdstate == 1: |
278 | # Byte 1: Master sends command ID. | |
279 | self.addr = 0 | |
486b19ce | 280 | self.ss_block = self.ss |
9389f2c1 | 281 | self.putx([8, ['Command: %s' % cmds[self.state][1]]]) |
1b1c914f | 282 | elif self.cmdstate in (2, 3, 4): |
868fd207 | 283 | # Bytes 2/3/4: Master sends sector address (24bits, MSB-first). |
87e574b7 UH |
284 | self.addr |= (mosi << ((4 - self.cmdstate) * 8)) |
285 | # self.putx([0, ['Sector address, byte %d: 0x%02x' % \ | |
286 | # (4 - self.cmdstate, mosi)]]) | |
1b1c914f UH |
287 | |
288 | if self.cmdstate == 4: | |
87e574b7 | 289 | d = 'Erase sector %d (0x%06x)' % (self.addr, self.addr) |
486b19ce | 290 | self.put(self.ss_block, self.es, self.out_ann, [24, [d]]) |
1b1c914f UH |
291 | # TODO: Max. size depends on chip, check that too if possible. |
292 | if self.addr % 4096 != 0: | |
293 | # Sector addresses must be 4K-aligned (same for all 3 chips). | |
173c919c | 294 | d = 'Warning: Invalid sector address!' |
486b19ce | 295 | self.put(self.ss_block, self.es, self.out_ann, [101, [d]]) |
4772a846 | 296 | self.state = None |
1b1c914f UH |
297 | else: |
298 | self.cmdstate += 1 | |
299 | ||
b54936a9 UH |
300 | def handle_be(self, mosi, miso): |
301 | pass # TODO | |
302 | ||
303 | def handle_ce(self, mosi, miso): | |
304 | pass # TODO | |
305 | ||
306 | def handle_ce2(self, mosi, miso): | |
307 | pass # TODO | |
308 | ||
309 | def handle_pp(self, mosi, miso): | |
310 | # Page program: Master asserts CS#, sends PP command, sends 3-byte | |
311 | # page address, sends >= 1 data bytes, de-asserts CS#. | |
312 | if self.cmdstate == 1: | |
313 | # Byte 1: Master sends command ID. | |
9389f2c1 | 314 | self.putx([12, ['Command: %s' % cmds[self.state][1]]]) |
b54936a9 UH |
315 | elif self.cmdstate in (2, 3, 4): |
316 | # Bytes 2/3/4: Master sends page address (24bits, MSB-first). | |
317 | self.addr |= (mosi << ((4 - self.cmdstate) * 8)) | |
318 | # self.putx([0, ['Page address, byte %d: 0x%02x' % \ | |
319 | # (4 - self.cmdstate, mosi)]]) | |
320 | if self.cmdstate == 4: | |
9389f2c1 | 321 | self.putx([24, ['Page address: 0x%06x' % self.addr]]) |
b54936a9 UH |
322 | self.addr = 0 |
323 | elif self.cmdstate >= 5: | |
324 | # Bytes 5-x: Master sends data bytes (until CS# de-asserted). | |
2c920167 AG |
325 | if self.cmdstate == 5: |
326 | self.ss_block = self.ss | |
327 | self.on_end_transaction = lambda: self.output_data_block('Page data') | |
328 | self.data.append(mosi) | |
b54936a9 UH |
329 | |
330 | self.cmdstate += 1 | |
331 | ||
332 | def handle_cp(self, mosi, miso): | |
333 | pass # TODO | |
334 | ||
335 | def handle_dp(self, mosi, miso): | |
336 | pass # TODO | |
337 | ||
338 | def handle_rdp_res(self, mosi, miso): | |
e33410d3 UH |
339 | if self.cmdstate == 1: |
340 | # Byte 1: Master sends command ID. | |
341 | self.ss_block = self.ss | |
342 | self.putx([16, ['Command: %s' % cmds[self.state][1]]]) | |
343 | elif self.cmdstate in (2, 3, 4): | |
344 | # Bytes 2/3/4: Master sends three dummy bytes. | |
345 | self.putx([24, ['Dummy byte: %02x' % mosi]]) | |
346 | elif self.cmdstate == 5: | |
347 | # Byte 5: Slave sends device ID. | |
db188228 UH |
348 | self.device_id = miso |
349 | self.putx([24, ['Device: %s' % self.vendor_device()]]) | |
e33410d3 UH |
350 | self.state = None |
351 | ||
352 | self.cmdstate += 1 | |
b54936a9 | 353 | |
9b4d8a57 | 354 | def handle_rems(self, mosi, miso): |
1b1c914f UH |
355 | if self.cmdstate == 1: |
356 | # Byte 1: Master sends command ID. | |
486b19ce | 357 | self.ss_block = self.ss |
9389f2c1 | 358 | self.putx([16, ['Command: %s' % cmds[self.state][1]]]) |
1b1c914f UH |
359 | elif self.cmdstate in (2, 3): |
360 | # Bytes 2/3: Master sends two dummy bytes. | |
361 | # TODO: Check dummy bytes? Check reply from device? | |
9389f2c1 | 362 | self.putx([24, ['Dummy byte: %s' % mosi]]) |
1b1c914f UH |
363 | elif self.cmdstate == 4: |
364 | # Byte 4: Master sends 0x00 or 0x01. | |
365 | # 0x00: Master wants manufacturer ID as first reply byte. | |
366 | # 0x01: Master wants device ID as first reply byte. | |
9b4d8a57 UH |
367 | self.manufacturer_id_first = True if (mosi == 0x00) else False |
368 | d = 'manufacturer' if (mosi == 0x00) else 'device' | |
9389f2c1 | 369 | self.putx([24, ['Master wants %s ID first' % d]]) |
1b1c914f UH |
370 | elif self.cmdstate == 5: |
371 | # Byte 5: Slave sends manufacturer ID (or device ID). | |
9b4d8a57 UH |
372 | self.ids = [miso] |
373 | d = 'Manufacturer' if self.manufacturer_id_first else 'Device' | |
9389f2c1 | 374 | self.putx([24, ['%s ID' % d]]) |
9b4d8a57 | 375 | elif self.cmdstate == 6: |
1b1c914f | 376 | # Byte 6: Slave sends device ID (or manufacturer ID). |
7f7ea759 | 377 | self.ids.append(miso) |
9b4d8a57 | 378 | d = 'Manufacturer' if self.manufacturer_id_first else 'Device' |
9389f2c1 | 379 | self.putx([24, ['%s ID' % d]]) |
1b1c914f UH |
380 | |
381 | if self.cmdstate == 6: | |
1b1c914f | 382 | id = self.ids[1] if self.manufacturer_id_first else self.ids[0] |
db188228 UH |
383 | self.device_id = id |
384 | self.putx([24, ['Device: %s' % self.vendor_device()]]) | |
4772a846 | 385 | self.state = None |
1b1c914f UH |
386 | else: |
387 | self.cmdstate += 1 | |
388 | ||
b54936a9 UH |
389 | def handle_rems2(self, mosi, miso): |
390 | pass # TODO | |
e4022299 | 391 | |
b54936a9 UH |
392 | def handle_enso(self, mosi, miso): |
393 | pass # TODO | |
e4022299 | 394 | |
b54936a9 UH |
395 | def handle_exso(self, mosi, miso): |
396 | pass # TODO | |
e4022299 | 397 | |
b54936a9 UH |
398 | def handle_rdscur(self, mosi, miso): |
399 | pass # TODO | |
e4022299 | 400 | |
b54936a9 UH |
401 | def handle_wrscur(self, mosi, miso): |
402 | pass # TODO | |
e4022299 | 403 | |
b54936a9 UH |
404 | def handle_esry(self, mosi, miso): |
405 | pass # TODO | |
1b1c914f | 406 | |
b54936a9 UH |
407 | def handle_dsry(self, mosi, miso): |
408 | pass # TODO | |
5ebb76fe | 409 | |
2c920167 AG |
410 | def output_data_block(self, label): |
411 | # Print accumulated block of data | |
412 | # (called on CS# de-assert via self.on_end_transaction callback). | |
413 | self.es_block = self.es # Ends on the CS# de-assert sample. | |
b33a73bc UH |
414 | if self.options['format'] == 'hex': |
415 | s = ' '.join([('%02x' % b) for b in self.data]) | |
416 | else: | |
417 | s = ''.join(map(chr, self.data)) | |
2c920167 | 418 | self.putb([25, ['%s %d bytes: %s' % (label, len(self.data), s)]]) |
1b1c914f | 419 | |
2c920167 | 420 | def decode(self, ss, es, data): |
9b4d8a57 | 421 | ptype, mosi, miso = data |
1b1c914f | 422 | |
2c920167 | 423 | self.ss, self.es = ss, es |
e4022299 | 424 | |
2c920167 AG |
425 | if ptype == 'CS-CHANGE': |
426 | self.end_current_transaction() | |
e4022299 | 427 | |
3e3c0330 | 428 | if ptype != 'DATA': |
9b4d8a57 | 429 | return |
1b1c914f | 430 | |
9b4d8a57 | 431 | # If we encountered a known chip command, enter the resp. state. |
35b380b1 | 432 | if self.state is None: |
781ef945 UH |
433 | self.state = mosi |
434 | self.cmdstate = 1 | |
1b1c914f | 435 | |
9b4d8a57 | 436 | # Handle commands. |
1ec9c5e2 AG |
437 | try: |
438 | self.cmd_handlers[self.state](mosi, miso) | |
439 | except KeyError: | |
9389f2c1 | 440 | self.putx([24, ['Unknown command: 0x%02x' % mosi]]) |
4772a846 | 441 | self.state = None |