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495 lines
18 KiB
Python
Executable File
495 lines
18 KiB
Python
Executable File
##
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## This file is part of the libsigrokdecode project.
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##
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## Copyright (C) 2014 Sławek Piotrowski <sentinel@atteo.org>
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 2 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, write to the Free Software
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## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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##
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import sigrokdecode as srd
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class Decoder(srd.Decoder):
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api_version = 2
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id = 'rfm12'
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name = 'RFM12'
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longname = 'RFM12 control protocol'
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desc = 'HopeRF RFM12 wireless transceiver control protocol.'
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license = 'gplv2+'
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inputs = ['spi']
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outputs = ['rfm12']
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annotations = (
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('cmd', 'Command'),
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('params', 'Command parameters'),
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('disabled', 'Disabled bits'),
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('return', 'Returned values'),
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('disabled_return', 'Disabled returned values'),
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('interpretation', 'Interpretation'),
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)
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annotation_rows = (
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('commands', 'Commands', (0, 1, 2)),
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('return', 'Return', (3, 4)),
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('interpretation', 'Interpretation', (5,)),
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)
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def __init__(self):
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self.mosi_bytes, self.miso_bytes = [], []
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self.mosi_bits, self.miso_bits = [], []
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self.row_pos = [0, 0, 0]
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self.ann_to_row = [0, 0, 0, 1, 1, 2]
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# Initialize with Power-On-Reset values.
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self.last_status = [0x00, 0x00]
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self.last_config = 0x08
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self.last_power = 0x08
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self.last_freq = 0x680
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self.last_data_rate = 0x23
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self.last_fifo_and_reset = 0x80
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self.last_afc = 0xF7
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self.last_transceiver = 0x00
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self.last_pll = 0x77
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def advance_ann(self, ann, length):
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row = self.ann_to_row[ann]
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self.row_pos[row] += length
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def putx(self, ann, length, description):
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if not isinstance(description, list):
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description = [description]
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row = self.ann_to_row[ann]
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bit = self.row_pos[row]
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self.put(self.mosi_bits[bit][1], self.mosi_bits[bit + length - 1][2],
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self.out_ann, [ann, description])
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bit += length
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self.row_pos[row] = bit
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def describe_bits(self, data, names):
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i = 0x01 << len(names) - 1
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bit = 0
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while i != 0:
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if names[bit] != '':
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self.putx(1 if (data & i) else 2, 1, names[bit])
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i >>= 1
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bit += 1
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def describe_return_bits(self, data, names):
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i = 0x01 << len(names) - 1
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bit = 0
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while i != 0:
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if names[bit] != '':
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self.putx(3 if (data & i) else 4, 1, names[bit])
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else:
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self.advance_ann(3, 1)
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i >>= 1
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bit += 1
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def describe_changed_bits(self, data, old_data, names):
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changes = data ^ old_data
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i = 0x01 << (len(names) - 1)
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bit = 0
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while i != 0:
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if names[bit] != '' and changes & i:
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s = ['+', 'Turning on'] if (data & i) else ['-', 'Turning off']
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self.putx(5, 1, s)
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else:
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self.advance_ann(5, 1)
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i >>= 1
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bit += 1
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def start(self):
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self.out_ann = self.register(srd.OUTPUT_ANN)
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def handle_configuration_cmd(self, cmd, ret):
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self.putx(0, 8, ['Configuration command', 'Configuration'])
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NAMES = [['Internal data register', 'el'], ['FIFO mode', 'ef']]
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bits = (cmd[1] & 0xC0) >> 6
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old_bits = (self.last_config & 0xC0) >> 6
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self.describe_bits(bits, NAMES)
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self.describe_changed_bits(bits, old_bits, NAMES)
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FREQUENCIES = ['315', '433', '868', '915']
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f = FREQUENCIES[(cmd[1] & 0x30) >> 4] + 'MHz'
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self.putx(1, 2, ['Frequency: ' + f, f])
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if cmd[1] & 0x30 != self.last_config & 0x30:
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self.putx(5, 2, ['Changed', '~'])
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c = '%.1fpF' % (8.5 + (cmd[1] & 0xF) * 0.5)
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self.putx(1, 4, ['Capacitance: ' + c, c])
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if cmd[1] & 0xF != self.last_config & 0xF:
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self.putx(5, 4, ['Changed', '~'])
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self.last_config = cmd[1]
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def handle_power_management_cmd(self, cmd, ret):
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self.putx(0, 8, ['Power management', 'Power'])
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NAMES = [['Receiver chain', 'er'], ['Baseband circuit', 'ebb'],
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['Transmission', 'et'], ['Synthesizer', 'es'],
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['Crystal oscillator', 'ex'], ['Low battery detector', 'eb'],
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['Wake-up timer', 'ew'], ['Clock output off switch', 'dc']]
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self.describe_bits(cmd[1], NAMES)
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power = cmd[1]
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# Some bits imply other, even if they are set to 0.
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if power & 0x80:
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power |= 0x58
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if power & 0x20:
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power |= 0x18
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self.describe_changed_bits(power, self.last_power, NAMES)
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self.last_power = power
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def handle_frequency_setting_cmd(self, cmd, ret):
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self.putx(0, 4, ['Frequency setting', 'Frequency'])
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f = ((cmd[1] & 0xF) << 8) + cmd[2]
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self.putx(0, 12, ['F = %3.4f' % f])
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self.row_pos[2] -= 4
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if self.last_freq != f:
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self.putx(5, 12, ['Changing', '~'])
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self.last_freq = f
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def handle_data_rate_cmd(self, cmd, ret):
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self.putx(0, 8, ['Data rate command', 'Data rate'])
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r = cmd[1] & 0x7F
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cs = (cmd[1] & 0x80) >> 7
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rate = 10000 / 29.0 / (r + 1) / (1 + 7 * cs)
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self.putx(0, 8, ['%3.1fkbps' % rate])
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if self.last_data_rate != cmd[1]:
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self.putx(5, 8, ['Changing', '~'])
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self.last_data_rate = cmd[1]
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def handle_receiver_control_cmd(self, cmd, ret):
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self.putx(0, 5, ['Receiver control command'])
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s = 'interrupt input' if (cmd[0] & 0x04) else 'VDI output'
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self.putx(0, 1, ['pin16 = ' + s])
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VDI_NAMES = ['Fast', 'Medium', 'Slow', 'Always on']
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vdi_speed = VDI_NAMES[cmd[0] & 0x3]
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self.putx(0, 2, ['VDI: %s' % vdi_speed])
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BANDWIDTH_NAMES = ['Reserved', '400kHz', '340kHz', '270kHz', '200kHz',
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'134kHz', '67kHz', 'Reserved']
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bandwidth = BANDWIDTH_NAMES[(cmd[1] & 0xE0) >> 5]
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self.putx(0, 3, ['Bandwidth: %s' % bandwidth])
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LNA_GAIN_NAMES = [0, -6, -14, -20]
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lna_gain = LNA_GAIN_NAMES[(cmd[1] & 0x18) >> 3]
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self.putx(0, 2, ['LNA gain: %ddB' % lna_gain])
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RSSI_THRESHOLD_NAMES = ['-103', '-97', '-91', '-85', '-79', '-73',
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'Reserved', 'Reserved']
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rssi_threshold = RSSI_THRESHOLD_NAMES[cmd[1] & 0x7]
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self.putx(0, 3, ['RSSI threshold: %s' % rssi_threshold])
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def handle_data_filter_cmd(self, cmd, ret):
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self.putx(0, 8, ['Data filter command'])
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if cmd[1] & 0x80:
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clock_recovery = 'auto'
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elif cmd[1] & 0x40:
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clock_recovery = 'fast'
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else:
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clock_recovery = 'slow'
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self.putx(0, 2, ['Clock recovery: %s mode' % clock_recovery])
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self.advance_ann(0, 1) # Should always be 1.
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s = 'analog' if (cmd[1] & 0x10) else 'digital'
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self.putx(0, 1, ['Data filter: ' + s])
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self.advance_ann(0, 1) # Should always be 1.
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self.putx(0, 3, ['DQD threshold: %d' % (cmd[1] & 0x7)])
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def handle_fifo_and_reset_cmd(self, cmd, ret):
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self.putx(0, 8, ['FIFO and reset command'])
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fifo_level = (cmd[1] & 0xF0) >> 4
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self.putx(0, 4, ['FIFO trigger level: %d' % fifo_level])
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last_fifo_level = (self.last_fifo_and_reset & 0xF0) >> 4
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if fifo_level != last_fifo_level:
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self.putx(5, 4, ['Changing', '~'])
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else:
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self.advance_ann(5, 4)
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s = 'one byte' if (cmd[1] & 0x08) else 'two bytes'
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self.putx(0, 1, ['Synchron length: ' + s])
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if (cmd[1] & 0x08) != (self.last_fifo_and_reset & 0x08):
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self.putx(5, 1, ['Changing', '~'])
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else:
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self.advance_ann(5, 1)
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if cmd[1] & 0x04:
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fifo_fill = 'Always'
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elif cmd[1] & 0x02:
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fifo_fill = 'After synchron pattern'
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else:
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fifo_fill = 'Never'
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self.putx(0, 2, ['FIFO fill: %s' % fifo_fill])
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if (cmd[1] & 0x06) != (self.last_fifo_and_reset & 0x06):
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self.putx(5, 2, ['Changing', '~'])
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else:
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self.advance_ann(5, 2)
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s = 'non-sensitive' if (cmd[1] & 0x01) else 'sensitive'
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self.putx(0, 1, ['Reset mode: ' + s])
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if (cmd[1] & 0x01) != (self.last_fifo_and_reset & 0x01):
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self.putx(5, 1, ['Changing', '~'])
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else:
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self.advance_ann(5, 1)
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self.last_fifo_and_reset = cmd[1]
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def handle_synchron_pattern_cmd(self, cmd, ret):
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self.putx(0, 8, ['Synchron pattern command'])
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if self.last_fifo_and_reset & 0x08:
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self.putx(0, 8, ['Pattern: 0x2D%02X' % pattern])
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else:
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self.putx(0, 8, ['Pattern: %02X' % pattern])
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def handle_fifo_read_cmd(self, cmd, ret):
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self.putx(0, 8, ['FIFO read command', 'FIFO read'])
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self.putx(3, 8, ['Data: %02X' % ret[1]])
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def handle_afc_cmd(self, cmd, ret):
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self.putx(0, 8, ['AFC command'])
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MODES = ['Off', 'Once', 'During receiving', 'Always']
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mode = (cmd[1] & 0xC0) >> 6
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self.putx(0, 2, ['Mode: %s' % MODES[mode]])
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if (cmd[1] & 0xC0) != (self.last_afc & 0xC0):
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self.putx(5, 2, ['Changing', '~'])
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else:
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self.advance_ann(5, 2)
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range_limit = (cmd[1] & 0x30) >> 4
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FREQ_TABLE = [0.0, 2.5, 5.0, 7.5]
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freq_delta = FREQ_TABLE[(self.last_config & 0x30) >> 4]
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if range_limit == 0:
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self.putx(0, 2, ['Range: No limit'])
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elif range_limit == 1:
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self.putx(0, 2, ['Range: +/-%dkHz' % (15 * freq_delta)])
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elif range_limit == 2:
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self.putx(0, 2, ['Range: +/-%dkHz' % (7 * freq_delta)])
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elif range_limit == 3:
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self.putx(0, 2, ['Range: +/-%dkHz' % (3 * freq_delta)])
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if (cmd[1] & 0x30) != (self.last_afc & 0x30):
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self.putx(5, 2, ['Changing', '~'])
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else:
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self.advance_ann(5, 2)
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NAMES = ['Strobe edge', 'High accuracy mode', 'Enable offset register',
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'Enable offset calculation']
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self.describe_bits(cmd[1] & 0xF, NAMES)
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self.describe_changed_bits(cmd[1] & 0xF, self.last_afc & 0xF, NAMES)
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self.last_afc = cmd[1]
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def handle_transceiver_control_cmd(self, cmd, ret):
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self.putx(0, 8, ['Transceiver control command'])
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self.putx(0, 4, ['FSK frequency delta: %dkHz' % (15 * ((cmd[1] & 0xF0) >> 4))])
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if cmd[1] & 0xF0 != self.last_transceiver & 0xF0:
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self.putx(5, 4, ['Changing', '~'])
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else:
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self.advance_ann(5, 4)
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POWERS = [0, -2.5, -5, -7.5, -10, -12.5, -15, -17.5]
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self.advance_ann(0, 1)
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self.advance_ann(5, 1)
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self.putx(0,3, ['Relative power: %dB' % (cmd[1] & 0x07)])
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if (cmd[1] & 0x07) != (self.last_transceiver & 0x07):
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self.putx(5, 3, ['Changing', '~'])
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else:
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self.advance_ann(5, 3)
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self.last_transceiver = cmd[1]
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def handle_pll_setting_cmd(self, cmd, ret):
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self.putx(0, 8, ['PLL setting command'])
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self.advance_ann(0, 1)
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self.putx(0, 2, ['Clock buffer rise and fall time'])
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self.advance_ann(0, 1)
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self.advance_ann(5, 4)
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NAMES = [['Delay in phase detector', 'dly'], ['Disable dithering', 'ddit']]
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self.describe_bits((cmd[1] & 0xC) >> 2, NAMES)
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self.describe_changed_bits((cmd[1] & 0xC) >> 2, (self.last_pll & 0xC) >> 2, NAMES)
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s = '256kbps, high' if (cmd[1] & 0x01) else '86.2kbps, low'
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self.putx(0, 1, ['Max bit rate: %s noise' % s])
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self.advance_ann(5, 1)
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if (cmd[1] & 0x01) != (self.last_pll & 0x01):
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self.putx(5, 1, ['Changing', '~'])
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self.last_pll = cmd[1]
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def handle_transmitter_register_cmd(self, cmd, ret):
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self.putx(0, 8, ['Transmitter register command', 'Transmit'])
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self.putx(0, 8, ['Data: %s' % cmd[1], '%s' % cmd[1]])
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def handle_software_reset_cmd(self, cmd, ret):
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self.putx(0, 16, ['Software reset command'])
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def handle_wake_up_timer_cmd(self, cmd, ret):
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self.putx(0, 3, ['Wake-up timer command', 'Timer'])
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r = cmd[0] & 0x1F
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m = cmd[1]
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time = 1.03 * m * pow(2, r) + 0.5
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self.putx(0, 13, ['Time: %7.2f' % time])
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def handle_low_duty_cycle_cmd(self, cmd, ret):
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self.putx(0, 16, ['Low duty cycle command'])
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def handle_low_battery_detector_cmd(self, cmd, ret):
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self.putx(0, 8, ['Low battery detector command'])
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NAMES = ['1', '1.25', '1.66', '2', '2.5', '3.33', '5', '10']
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clock = NAMES[(cmd[1] & 0xE0) >> 5]
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self.putx(0, 3, ['Clock output: %sMHz' % clock, '%sMHz' % clock])
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self.advance_ann(0, 1)
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v = 2.25 + (cmd[1] & 0x0F) * 0.1
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self.putx(0, 4, ['Low battery voltage: %1.2fV' % v, '%1.2fV' % v])
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def handle_status_read_cmd(self, cmd, ret):
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self.putx(0, 8, ['Status read command', 'Status'])
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NAMES = ['RGIT/FFIT', 'POR', 'RGUR/FFOV', 'WKUP', 'EXT', 'LBD',
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'FFEM', 'RSSI/ATS', 'DQD', 'CRL', 'ATGL']
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status = (ret[0] << 3) + (ret[1] >> 5)
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self.row_pos[1] -= 8
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self.row_pos[2] -= 8
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self.describe_return_bits(status, NAMES)
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receiver_enabled = (self.last_power & 0x80) >> 7
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if ret[0] & 0x80:
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if receiver_enabled:
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s = 'Received data in FIFO'
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else:
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s = 'Transmit register ready'
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self.putx(5, 1, s)
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else:
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self.advance_ann(5, 1)
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if ret[0] & 0x40:
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self.putx(5, 1, 'Power on Reset')
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else:
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self.advance_ann(5, 1)
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if ret[0] & 0x20:
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if receiver_enabled:
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s = 'RX FIFO overflow'
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else:
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s = 'Transmit register under run'
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self.putx(5, 1, s)
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else:
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self.advance_ann(5, 1)
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if ret[0] & 0x10:
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self.putx(5, 1, 'Wake-up timer')
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else:
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self.advance_ann(5, 1)
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if ret[0] & 0x08:
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self.putx(5, 1, 'External interrupt')
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else:
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self.advance_ann(5, 1)
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if ret[0] & 0x04:
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self.putx(5, 1, 'Low battery')
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else:
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self.advance_ann(5, 1)
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if ret[0] & 0x02:
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self.putx(5, 1, 'FIFO is empty')
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else:
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self.advance_ann(5, 1)
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if ret[0] & 0x01:
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if receiver_enabled:
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s = 'Incoming signal above limit'
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else:
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s = 'Antenna detected RF signal'
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self.putx(5, 1, s)
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else:
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self.advance_ann(5, 1)
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if ret[1] & 0x80:
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self.putx(5, 1, 'Data quality detector')
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else:
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self.advance_ann(5, 1)
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if ret[1] & 0x40:
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self.putx(5, 1, 'Clock recovery locked')
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else:
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self.advance_ann(5, 1)
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self.advance_ann(5, 1)
|
|
|
|
self.putx(3, 5, ['AFC offset'])
|
|
if (self.last_status[1] & 0x1F) != (ret[1] & 0x1F):
|
|
self.putx(5, 5, ['Changed', '~'])
|
|
self.last_status = ret
|
|
|
|
def handle_cmd(self, cmd, ret):
|
|
if cmd[0] == 0x80:
|
|
self.handle_configuration_cmd(cmd, ret)
|
|
elif cmd[0] == 0x82:
|
|
self.handle_power_management_cmd(cmd, ret)
|
|
elif cmd[0] & 0xF0 == 0xA0:
|
|
self.handle_frequency_setting_cmd(cmd, ret)
|
|
elif cmd[0] == 0xC6:
|
|
self.handle_data_rate_cmd(cmd, ret)
|
|
elif cmd[0] & 0xF8 == 0x90:
|
|
self.handle_receiver_control_cmd(cmd, ret)
|
|
elif cmd[0] == 0xC2:
|
|
self.handle_data_filter_cmd(cmd, ret)
|
|
elif cmd[0] == 0xCA:
|
|
self.handle_fifo_and_reset_cmd(cmd, ret)
|
|
elif cmd[0] == 0xCE:
|
|
self.handle_synchron_pattern_cmd(cmd, ret)
|
|
elif cmd[0] == 0xB0:
|
|
self.handle_fifo_read_cmd(cmd, ret)
|
|
elif cmd[0] == 0xC4:
|
|
self.handle_afc_cmd(cmd, ret)
|
|
elif cmd[0] & 0xFE == 0x98:
|
|
self.handle_transceiver_control_cmd(cmd, ret)
|
|
elif cmd[0] == 0xCC:
|
|
self.handle_pll_setting_cmd(cmd, ret)
|
|
elif cmd[0] == 0xB8:
|
|
self.handle_transmitter_register_cmd(cmd, ret)
|
|
elif cmd[0] == 0xFE:
|
|
self.handle_software_reset_cmd(cmd, ret)
|
|
elif cmd[0] & 0xE0 == 0xE0:
|
|
self.handle_wake_up_timer_cmd(cmd, ret)
|
|
elif cmd[0] == 0xC8:
|
|
self.handle_low_duty_cycle_cmd(cmd, ret)
|
|
elif cmd[0] == 0xC0:
|
|
self.handle_low_battery_detector_cmd(cmd, ret)
|
|
elif cmd[0] == 0x00:
|
|
self.handle_status_read_cmd(cmd, ret)
|
|
else:
|
|
c = '%02x %02x' % tuple(cmd)
|
|
r = '%02x %02x' % tuple(ret)
|
|
self.putx(0, 16, ['Unknown command: %s (reply: %s)!' % (c, r)])
|
|
|
|
def decode(self, ss, es, data):
|
|
ptype, mosi, miso = data
|
|
|
|
# For now, only use DATA and BITS packets.
|
|
if ptype not in ('DATA', 'BITS'):
|
|
return
|
|
|
|
# Store the individual bit values and ss/es numbers. The next packet
|
|
# is guaranteed to be a 'DATA' packet belonging to this 'BITS' one.
|
|
if ptype == 'BITS':
|
|
if mosi is not None:
|
|
self.mosi_bits.extend(reversed(mosi))
|
|
if miso is not None:
|
|
self.miso_bits.extend(reversed(miso))
|
|
return
|
|
|
|
# Append new bytes.
|
|
self.mosi_bytes.append(mosi)
|
|
self.miso_bytes.append(miso)
|
|
|
|
# All commands consist of 2 bytes.
|
|
if len(self.mosi_bytes) < 2:
|
|
return
|
|
|
|
self.row_pos = [0, 8, 8]
|
|
|
|
self.handle_cmd(self.mosi_bytes, self.miso_bytes)
|
|
|
|
self.mosi_bytes, self.miso_bytes = [], []
|
|
self.mosi_bits, self.miso_bits = [], []
|