diff options
Diffstat (limited to 'decoders')
| -rw-r--r-- | decoders/cc1101/__init__.py | 28 | ||||
| -rw-r--r-- | decoders/cc1101/lists.py | 115 | ||||
| -rw-r--r-- | decoders/cc1101/pd.py | 312 |
3 files changed, 455 insertions, 0 deletions
diff --git a/decoders/cc1101/__init__.py b/decoders/cc1101/__init__.py new file mode 100644 index 0000000..68fc798 --- /dev/null +++ b/decoders/cc1101/__init__.py @@ -0,0 +1,28 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2019 Marco Geisler <m-sigrok@mageis.de> +## +## 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, see <http://www.gnu.org/licenses/>. +## + +''' +This decoder stacks on top of the 'spi' PD and decodes the protocol spoken +by the Texas Instruments low-power sub-1GHz RF transceiver chips. + +Details: +http://www.ti.com/lit/ds/symlink/cc1101.pdf +''' + +from .pd import Decoder diff --git a/decoders/cc1101/lists.py b/decoders/cc1101/lists.py new file mode 100644 index 0000000..dfb9b07 --- /dev/null +++ b/decoders/cc1101/lists.py @@ -0,0 +1,115 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2019 Marco Geisler <m-sigrok@mageis.de> +## +## 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, see <http://www.gnu.org/licenses/>. +## + +regs = { +# addr: 'name' + 0x00: 'IOCFG2', + 0x01: 'IOCFG1', + 0x02: 'IOCFG0', + 0x03: 'FIFOTHR', + 0x04: 'SYNC1', + 0x05: 'SYNC0', + 0x06: 'PKTLEN', + 0x07: 'PKTCTRL1', + 0x08: 'PKTCTRL0', + 0x09: 'ADDR', + 0x0A: 'CHANNR', + 0x0B: 'FSCTRL1', + 0x0C: 'FSCTRL0', + 0x0D: 'FREQ2', + 0x0E: 'FREQ1', + 0x0F: 'FREQ0', + 0x10: 'MDMCFG4', + 0x11: 'MDMCFG3', + 0x12: 'MDMCFG2', + 0x13: 'MDMCFG1', + 0x14: 'MDMCFG0', + 0x15: 'DEVIATN', + 0x16: 'MCSM2', + 0x17: 'MCSM1', + 0x18: 'MCSM0', + 0x19: 'FOCCFG', + 0x1A: 'BSCFG', + 0x1B: 'AGCTRL2', + 0x1C: 'AGCTRL1', + 0x1D: 'AGCTRL0', + 0x1E: 'WOREVT1', + 0x1F: 'WOREVT0', + 0x20: 'WORCTRL', + 0x21: 'FREND1', + 0x22: 'FREND0', + 0x23: 'FSCAL3', + 0x24: 'FSCAL2', + 0x25: 'FSCAL1', + 0x26: 'FSCAL0', + 0x27: 'RCCTRL1', + 0x28: 'RCCTRL0', + 0x29: 'FSTEST', + 0x2A: 'PTEST', + 0x2B: 'AGCTEST', + 0x2C: 'TEST2', + 0x2D: 'TEST1', + 0x2E: 'TEST0', + 0x30: 'PARTNUM', + 0x31: 'VERSION', + 0x32: 'FREQEST', + 0x33: 'LQI', + 0x34: 'RSSI', + 0x35: 'MARCSTATE', + 0x36: 'WORTIME1', + 0x37: 'WORTIME0', + 0x38: 'PKTSTATUS', + 0x39: 'VCO_VC_DAC', + 0x3A: 'TXBYTES', + 0x3B: 'RXBYTES', + 0x3C: 'RCCTRL1_STATUS', + 0x3D: 'RCCTRL0_STATUS', + 0x3E: 'PATABLE', + 0x3F: 'FIFO' +} + +strobes = { +# addr: 'name' + 0x30: 'SRES', + 0x31: 'SFSTXON', + 0x32: 'SXOFF', + 0x33: 'SCAL', + 0x34: 'SRX', + 0x35: 'STX', + 0x36: 'SIDLE', + 0x37: '', + 0x38: 'SWOR', + 0x39: 'SPWD', + 0x3A: 'SFRX', + 0x3B: 'SFTX', + 0x3C: 'SWORRST', + 0x3D: 'SNOP' +} + +status_reg_states = { +# value: 'state name' + 0b000: 'IDLE', + 0b001: 'RX', + 0b010: 'TX', + 0b011: 'FSTXON', + 0b100: 'CALIBRATE', + 0b101: 'SETTLING', + 0b110: 'RXFIFO_OVERFLOW', + 0b111: 'TXFIFO_OVERFLOW' +} diff --git a/decoders/cc1101/pd.py b/decoders/cc1101/pd.py new file mode 100644 index 0000000..8b543aa --- /dev/null +++ b/decoders/cc1101/pd.py @@ -0,0 +1,312 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2019 Marco Geisler <m-sigrok@mageis.de> +## +## 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, see <http://www.gnu.org/licenses/>. +## + +import sigrokdecode as srd +from .lists import * + +class Decoder(srd.Decoder): + api_version = 3 + id = 'cc1101' + name = 'CC1101' + longname = 'Texas Instruments CC1101' + desc = 'Low-power sub-1GHz RF transceiver chip.' + license = 'gplv2+' + inputs = ['spi'] + outputs = [] + tags = ['IC', 'Wireless/RF'] + annotations = ( + ('strobe', 'Command strobe'), + ('single_read', 'Single register read'), + ('single_write', 'Single register write'), + ('burst_read', 'Burst register read'), + ('burst_write', 'Burst register write'), + ('status', 'Status register'), + ('warning', 'Warning'), + ) + ann_strobe = 0 + ann_single_read = 1 + ann_single_write = 2 + ann_burst_read = 3 + ann_burst_write = 4 + ann_status_read = 5 + ann_status = 6 + ann_warn = 7 + annotation_rows = ( + ('cmd', 'Commands', (ann_strobe,)), + ('data', 'Data', (ann_single_read, ann_single_write, ann_burst_read, ann_burst_write, ann_status_read)), + ('status', 'Status register', (ann_status,)), + ('warnings', 'Warnings', (ann_warn,)), + ) + + def __init__(self): + self.reset() + + def reset(self): + self.next() + self.requirements_met = True + self.cs_was_released = False + + def start(self): + self.out_ann = self.register(srd.OUTPUT_ANN) + + def warn(self, pos, msg): + '''Put a warning message 'msg' at 'pos'.''' + self.put(pos[0], pos[1], self.out_ann, [self.ann_warn, [msg]]) + + def putp(self, pos, ann, msg): + '''Put an annotation message 'msg' at 'pos'.''' + self.put(pos[0], pos[1], self.out_ann, [ann, [msg]]) + + def putp2(self, pos, ann, msg1, msg2): + '''Put an annotation message 'msg' at 'pos'.''' + self.put(pos[0], pos[1], self.out_ann, [ann, [msg1, msg2]]) + + def next(self): + '''Resets the decoder after a complete command was decoded.''' + # 'True' for the first byte after CS# went low. + self.first = True + + # The current command, and the minimum and maximum number + # of data bytes to follow. + self.cmd = None + self.min = 0 + self.max = 0 + + # Used to collect the bytes after the command byte + # (and the start/end sample number). + self.mb = [] + self.ss_mb = -1 + self.es_mb = -1 + + def mosi_bytes(self): + '''Returns the collected MOSI bytes of a multi byte command.''' + return [b[0] for b in self.mb] + + def miso_bytes(self): + '''Returns the collected MISO bytes of a multi byte command.''' + return [b[1] for b in self.mb] + + def decode_command(self, pos, b): + '''Decodes the command byte 'b' at position 'pos' and prepares + the decoding of the following data bytes.''' + c = self.parse_command(b) + if c is None: + self.warn(pos, 'unknown command') + return + + self.cmd, self.dat, self.min, self.max = c + + if self.cmd in ('STROBE_CMD',): + self.putp(pos, self.ann_strobe, self.format_command()) + else: + # Don't output anything now, the command is merged with + # the data bytes following it. + self.ss_mb = pos[0] + + def format_command(self): + '''Returns the label for the current command.''' + if self.cmd == 'SINGLE_READ': + reg = regs[self.dat] if self.dat in regs else 'unknown register' + return 'Read' + if self.cmd == 'BURST_READ': + reg = regs[self.dat] if self.dat in regs else 'unknown register' + return 'Burst read' + if self.cmd == 'SINGLE_WRITE': + reg = regs[self.dat] if self.dat in regs else 'unknown register' + return 'Write' + if self.cmd == 'BURST_WRITE': + reg = regs[self.dat] if self.dat in regs else 'unknown register' + return 'Burst write' + if self.cmd == 'STATUS_READ': + reg = regs[self.dat] if self.dat in regs else 'unknown register' + return 'Status read' + if self.cmd == 'STROBE_CMD': + reg = strobes[self.dat] if self.dat in strobes else 'unknown strobe' + return 'STROBE "{}"'.format(reg) + else: + return 'TODO Cmd {}'.format(self.cmd) + + def parse_command(self, b): + '''Parses the command byte. + + Returns a tuple consisting of: + - the name of the command + - additional data needed to dissect the following bytes + - minimum number of following bytes + - maximum number of following bytes (None for infinite) + ''' + + addr = b & 0x3F + if (addr < 0x30) or (addr == 0x3E) or (addr == 0x3F): + if (b & 0xC0) == 0x00: + return ('SINGLE_WRITE', addr, 1, 1) + if (b & 0xC0) == 0x40: + return ('BURST_WRITE', addr, 1, 99999) + if (b & 0xC0) == 0x80: + return ('SINGLE_READ', addr, 1, 1) + if (b & 0xC0) == 0xC0: + return ('BURST_READ', addr, 1, 99999) + else: + self.warn(pos, 'unknown address/command combination') + else: + if (b & 0x40) == 0x00: + return ('STROBE_CMD', addr, 0, 0) + if (b & 0xC0) == 0xC0: + return ('STATUS_READ', addr, 1, 99999) + else: + self.warn(pos, 'unknown address/command combination') + + def decode_register(self, pos, ann, regid, data): + '''Decodes a register. + + pos -- start and end sample numbers of the register + ann -- the annotation number that is used to output the register. + regid -- may be either an integer used as a key for the 'regs' + dictionary, or a string directly containing a register name.' + data -- the register content. + ''' + + if type(regid) == int: + # Get the name of the register. + if regid not in regs: + self.warn(pos, 'unknown register') + return + name = '{} (0x{:02X})'.format(regs[regid], regid) + else: + name = regid + + if regid == 'STATUS' and ann == self.ann_status: + label = 'Status' + self.decode_status_reg(pos, ann, data, label) + else: + if self.cmd in ('SINGLE_WRITE', 'SINGLE_READ', 'STATUS_READ', 'BURST_READ', 'BURST_WRITE'): + label = '{}: {}'.format(self.format_command(), name) + else: + label = 'Reg ({}) {}'.format(self.cmd, name) + self.decode_mb_data(pos, ann, data, label) + + def decode_status_reg(self, pos, ann, data, label): + '''Decodes the data bytes 'data' of a status register at position + 'pos'. The decoded data is prefixed with 'label'.''' + status = data[0] + # bit 7 --> CHIP_RDYn + if status & 0b10000000 == 0b10000000: + longtext_chiprdy = 'CHIP_RDYn is high! ' + else: + longtext_chiprdy = '' + # bits 6:4 --> STATE + state = (status & 0x70) >> 4 + longtext_state = 'STATE is {}, '.format(status_reg_states[state]) + # bits 3:0 --> FIFO_BYTES_AVAILABLE + fifo_bytes = status & 0x0F + if self.cmd in ('SINGLE_READ', 'STATUS_READ', 'BURST_READ'): + longtext_fifo = '{} bytes available in RX FIFO'.format(fifo_bytes) + else: + longtext_fifo = '{} bytes free in TX FIFO'.format(fifo_bytes) + + text = '{} = "0x{:02X}"'.format(label, status) + longtext = ''.join([text, '; ', longtext_chiprdy, longtext_state, longtext_fifo]) + self.putp2(pos, ann, longtext, text) + + def decode_mb_data(self, pos, ann, data, label): + '''Decodes the data bytes 'data' of a multibyte command at position + 'pos'. The decoded data is prefixed with 'label'.''' + + def escape(b): + return '{:02X}'.format(b) + + data = ' '.join([escape(b) for b in data]) + text = '{} = "0x{}"'.format(label, data) + self.putp(pos, ann, text) + + def finish_command(self, pos): + '''Decodes the remaining data bytes at position 'pos'.''' + + if self.cmd == 'SINGLE_WRITE': + self.decode_register(pos, self.ann_single_write, + self.dat, self.mosi_bytes()) + elif self.cmd == 'BURST_WRITE': + self.decode_register(pos, self.ann_burst_write, + self.dat, self.mosi_bytes()) + elif self.cmd == 'SINGLE_READ': + self.decode_register(pos, self.ann_single_read, + self.dat, self.miso_bytes()) + elif self.cmd == 'BURST_READ': + self.decode_register(pos, self.ann_burst_read, + self.dat, self.miso_bytes()) + elif self.cmd == 'STROBE_CMD': + self.decode_register(pos, self.ann_strobe, + self.dat, self.mosi_bytes()) + elif self.cmd == 'STATUS_READ': + self.decode_register(pos, self.ann_status_read, + self.dat, self.miso_bytes()) + else: + self.warn(pos, 'unhandled command') + + def decode(self, ss, es, data): + if not self.requirements_met: + return + + ptype, data1, data2 = data + + if ptype == 'CS-CHANGE': + if data1 is None: + if data2 is None: + self.requirements_met = False + raise ChannelError('CS# pin required.') + elif data2 == 1: + self.cs_was_released = True + + if data1 == 0 and data2 == 1: + # Rising edge, the complete command is transmitted, process + # the bytes that were sent after the command byte. + if self.cmd: + # Check if we got the minimum number of data bytes + # after the command byte. + if len(self.mb) < self.min: + self.warn((ss, ss), 'missing data bytes') + elif self.mb: + self.finish_command((self.ss_mb, self.es_mb)) + + self.next() + self.cs_was_released = True + + elif ptype == 'DATA' and self.cs_was_released: + mosi, miso = data1, data2 + pos = (ss, es) + + if miso is None or mosi is None: + self.requirements_met = False + raise ChannelError('Both MISO and MOSI pins required.') + + if self.first: + self.first = False + # First MOSI byte is always the command. + self.decode_command(pos, mosi) + # First MISO byte is always the status register. + self.decode_register(pos, self.ann_status, 'STATUS', [miso]) + else: + if not self.cmd or len(self.mb) >= self.max: + self.warn(pos, 'excess byte') + else: + # Collect the bytes after the command byte. + if self.ss_mb == -1: + self.ss_mb = ss + self.es_mb = es + self.mb.append((mosi, miso)) |