diff options
| -rw-r--r-- | decoders/adns5020/__init__.py | 26 | ||||
| -rw-r--r-- | decoders/adns5020/pd.py | 113 |
2 files changed, 139 insertions, 0 deletions
diff --git a/decoders/adns5020/__init__.py b/decoders/adns5020/__init__.py new file mode 100644 index 0000000..a0cc63c --- /dev/null +++ b/decoders/adns5020/__init__.py @@ -0,0 +1,26 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2015 Karl Palsson <karlp@tweak.net.au> +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; either version 2 of the License, or +## (at your option) any later version. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with this program; if not, write to the Free Software +## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +## + +''' +This decoder stacks on top of the 'spi' PD and decodes ADNS-5020 optical mouse +sensor commands and data. Use MOSI for the SDIO shared line. +''' + +from .pd import Decoder diff --git a/decoders/adns5020/pd.py b/decoders/adns5020/pd.py new file mode 100644 index 0000000..ed92322 --- /dev/null +++ b/decoders/adns5020/pd.py @@ -0,0 +1,113 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2015 Karl Palsson <karlp@tweak.net.au> +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; either version 2 of the License, or +## (at your option) any later version. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with this program; if not, write to the Free Software +## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +## + +import sigrokdecode as srd + +regs = { + 0: 'Product_ID', + 1: 'Revision_ID', + 2: 'Motion', + 3: 'Delta_X', + 4: 'Delta_Y', + 5: 'SQUAL', + 6: 'Shutter_Upper', + 7: 'Shutter_Lower', + 8: 'Maximum_Pixel', + 9: 'Pixel_Sum', + 0xa: 'Minimum_Pixel', + 0xb: 'Pixel_Grab', + 0xd: 'Mouse_Control', + 0x3a: 'Chip_Reset', + 0x3f: 'Inv_Rev_ID', + 0x63: 'Motion_Burst', +} + +class Decoder(srd.Decoder): + api_version = 2 + id = 'adns5020' + name = 'ADNS-5020' + longname = 'ADNS-5020 optical mouse sensor' + desc = 'Bidirectional command and data over an SPI-like protocol.' + license = 'gplv2' + inputs = ['spi'] + outputs = ['adns5020'] + annotations = ( + ('read', 'Register read commands'), + ('write', 'Register write commands'), + ('warning', 'Warnings'), + ) + annotation_rows = ( + ('read', 'Read', (0,)), + ('write', 'Write', (1,)), + ('warnings', 'Warnings', (2,)), + ) + + def __init__(self, **kwargs): + self.ss_cmd, self.es_cmd = 0, 0 + self.mosi_bytes = [] + + def start(self): + self.out_ann = self.register(srd.OUTPUT_ANN) + + def putx(self, data): + self.put(self.ss_cmd, self.es_cmd, self.out_ann, data) + + def put_warn(self, pos, msg): + self.put(pos[0], pos[1], self.out_ann, [2, [msg]]) + + def decode(self, ss, es, data): + ptype = data[0] + if ptype == 'CS-CHANGE': + # If we transition high mid-stream, toss out our data and restart. + cs_old, cs_new = data[1:] + if cs_old is not None and cs_old == 0 and cs_new == 1: + if len(self.mosi_bytes) not in [0, 2]: + self.put_warn([self.ss_cmd, es], 'Misplaced CS#!') + self.mosi_bytes = [] + return + + # Don't care about anything else. + if ptype != 'DATA': + return + mosi, miso = data[1:] + + self.ss, self.es = ss, es + + if len(self.mosi_bytes) == 0: + self.ss_cmd = ss + self.mosi_bytes.append(mosi) + + # Writes/reads are mostly two transfers (burst mode is different). + if len(self.mosi_bytes) != 2: + return + + self.es_cmd = es + cmd, arg = self.mosi_bytes + write = cmd & 0x80 + reg = cmd & 0x7f + reg_desc = regs.get(reg, 'Reserved %#x' % reg) + if reg > 0x63: + reg_desc = 'Unknown' + if write: + self.putx([1, ['%s=>%#x' % (reg_desc, arg)]]) + else: + self.putx([0, ['%s<=%d' % (reg_desc, arg)]]) + + self.mosi_bytes = [] |