def cmd_annotation_classes():
return tuple([tuple([cmd[0].lower(), cmd[1]]) for cmd in cmds.values()])
+def decode_dual_bytes(sio0, sio1):
+ # Given a byte in SIO0 (MOSI) of even bits and a byte in
+ # SIO1 (MISO) of odd bits, return a tuple of two bytes.
+ def combine_byte(even, odd):
+ result = 0
+ for bit in range(4):
+ if even & (1 << bit):
+ result |= 1 << (bit*2)
+ if odd & (1 << bit):
+ result |= 1 << ((bit*2) + 1)
+ return result
+ return (combine_byte(sio0 >> 4, sio1 >> 4), combine_byte(sio0, sio1))
+
def decode_status_reg(data):
# TODO: Additional per-bit(s) self.put() calls with correct start/end.
options = (
{'id': 'chip', 'desc': 'Chip', 'default': tuple(chips.keys())[0],
'values': tuple(chips.keys())},
+ {'id': 'format', 'desc': 'Data format', 'default': 'hex',
+ 'values': ('hex', 'ascii')},
)
def __init__(self):
+ self.device_id = -1
self.on_end_transaction = None
self.end_current_transaction()
+ # Build dict mapping command keys to handler functions. Each
+ # command in 'cmds' (defined in lists.py) has a matching
+ # handler self.handle_<shortname>.
+ def get_handler(cmd):
+ s = 'handle_%s' % cmds[cmd][0].lower().replace('/', '_')
+ return getattr(self, s)
+ self.cmd_handlers = dict((cmd, get_handler(cmd)) for cmd in cmds.keys())
+
def end_current_transaction(self):
if self.on_end_transaction is not None: # Callback for CS# transition.
self.on_end_transaction()
def start(self):
self.out_ann = self.register(srd.OUTPUT_ANN)
self.chip = chips[self.options['chip']]
+ self.vendor = self.options['chip'].split('_')[0]
def putx(self, data):
# Simplification, most annotations span exactly one SPI byte/packet.
def putb(self, data):
self.put(self.ss_block, self.es_block, self.out_ann, data)
+ def vendor_device(self):
+ dev = device_name[self.vendor].get(self.device_id, 'Unknown')
+ return '%s %s' % (self.chip['vendor'], dev)
+
def handle_wren(self, mosi, miso):
self.putx([0, ['Command: %s' % cmds[self.state][1]]])
self.state = None
self.putx([2, ['Device ID: 0x%02x' % miso]])
if self.cmdstate == 4:
- # TODO: Check self.device_id is valid & exists in device_names.
# TODO: Same device ID? Check!
- d = 'Device: Macronix %s' % device_name[self.device_id]
+ d = 'Device: %s' % self.vendor_device()
self.put(self.ss_block, self.es, self.out_ann, [0, [d]])
self.state = None
else:
self.cmdstate += 1
def handle_wrsr(self, mosi, miso):
- pass # TODO
+ # Write status register: Master asserts CS#, sends WRSR command,
+ # writes 1 or 2 status register byte(s).
+ # When done, the master de-asserts CS# again. If this doesn't happen
+ # the WRSR command will not be executed.
+ if self.cmdstate == 1:
+ # Byte 1: Master sends command ID.
+ self.putx([3, ['Command: %s' % cmds[self.state][1]]])
+ elif self.cmdstate in (2, 3):
+ # Bytes 2 and/or 3: Master sends status register byte(s).
+ self.putx([24, ['Status register: 0x%02x' % miso]])
+ self.putx([25, [decode_status_reg(miso)]])
+ # TODO: Handle status register 2 correctly.
+
+ self.cmdstate += 1
def handle_read(self, mosi, miso):
# Read data bytes: Master asserts CS#, sends READ command, sends
# Bytes 6-x: Master reads data bytes (until CS# de-asserted).
if self.cmdstate == 6:
self.ss_block = self.ss
- self.on_end_transaction = lambda: self.output_block("Read")
+ self.on_end_transaction = lambda: self.output_data_block('Read')
self.data.append(miso)
self.cmdstate += 1
def handle_2read(self, mosi, miso):
- pass # TODO
+ # Fast read dual I/O: Same as fast read, but all data
+ # after the command is sent via two I/O pins.
+ # MOSI = SIO0 = even bits, MISO = SIO1 = odd bits.
+ # Recombine the bytes and pass them up to the handle_fast_read command.
+ if self.cmdstate == 1:
+ # Byte 1: Master sends command ID.
+ self.putx([5, ['Command: %s' % cmds[self.state][1]]])
+ self.cmdstate = 2
+ else:
+ # Dual I/O mode.
+ a, b = decode_dual_bytes(mosi, miso)
+ # Pass same byte in as both MISO & MOSI, parser state determines
+ # which one it cares about.
+ self.handle_fast_read(a, a)
+ self.handle_fast_read(b, b)
# TODO: Warn/abort if we don't see the necessary amount of bytes.
# TODO: Warn if WREN was not seen before.
pass # TODO
def handle_rdp_res(self, mosi, miso):
- pass # TODO
+ if self.cmdstate == 1:
+ # Byte 1: Master sends command ID.
+ self.ss_block = self.ss
+ self.putx([16, ['Command: %s' % cmds[self.state][1]]])
+ elif self.cmdstate in (2, 3, 4):
+ # Bytes 2/3/4: Master sends three dummy bytes.
+ self.putx([24, ['Dummy byte: %02x' % mosi]])
+ elif self.cmdstate == 5:
+ # Byte 5: Slave sends device ID.
+ self.device_id = miso
+ self.putx([24, ['Device: %s' % self.vendor_device()]])
+ self.state = None
+
+ self.cmdstate += 1
def handle_rems(self, mosi, miso):
if self.cmdstate == 1:
if self.cmdstate == 6:
id = self.ids[1] if self.manufacturer_id_first else self.ids[0]
- self.putx([24, ['Device: Macronix %s' % device_name[id]]])
+ self.device_id = id
+ self.putx([24, ['Device: %s' % self.vendor_device()]])
self.state = None
else:
self.cmdstate += 1
# Print accumulated block of data
# (called on CS# de-assert via self.on_end_transaction callback).
self.es_block = self.es # Ends on the CS# de-assert sample.
- s = ' '.join([('%02x' % b) for b in self.data])
+ if self.options['format'] == 'hex':
+ s = ' '.join([('%02x' % b) for b in self.data])
+ else:
+ s = ''.join(map(chr, self.data))
self.putb([25, ['%s %d bytes: %s' % (label, len(self.data), s)]])
def decode(self, ss, es, data):
self.cmdstate = 1
# Handle commands.
- if self.state in cmds:
- s = 'handle_%s' % cmds[self.state][0].lower().replace('/', '_')
- handle_reg = getattr(self, s)
- handle_reg(mosi, miso)
- else:
+ try:
+ self.cmd_handlers[self.state](mosi, miso)
+ except KeyError:
self.putx([24, ['Unknown command: 0x%02x' % mosi]])
self.state = None
projects / libsigrokdecode.git / blobdiff