diff options
| -rw-r--r-- | decoders/mx25lxx05d/mx25lxx05d.py | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/decoders/mx25lxx05d/mx25lxx05d.py b/decoders/mx25lxx05d/mx25lxx05d.py index cb54728..c6e950d 100644 --- a/decoders/mx25lxx05d/mx25lxx05d.py +++ b/decoders/mx25lxx05d/mx25lxx05d.py @@ -277,6 +277,37 @@ class Decoder(srd.Decoder): self.cmdstate += 1 + def handle_read(self, mosi, miso): + # Read data bytes: Master asserts CS#, sends READ command, sends + # 3-byte address, reads >= 1 data bytes, de-asserts CS#. + if self.cmdstate == 1: + # Byte 1: Master sends command ID. + self.putx([0, ['Command: %s' % cmds[self.cmd]]]) + elif self.cmdstate in (2, 3, 4): + # Bytes 2/3/4: Master sends read address (24bits, MSB-first). + self.addr |= (mosi << ((4 - self.cmdstate) * 8)) + # self.putx([0, ['Read address, byte %d: 0x%02x' % \ + # (4 - self.cmdstate, mosi)]]) + if self.cmdstate == 4: + self.putx([0, ['Read address: 0x%06x' % self.addr]]) + self.addr = 0 + elif self.cmdstate >= 5: + # Bytes 5-x: Master reads data bytes (until CS# de-asserted). + # TODO: For now we hardcode 256 bytes per READ command. + if self.cmdstate <= 256 + 4: # TODO: While CS# asserted. + self.data.append(miso) + # self.putx([0, ['New read byte: 0x%02x' % miso]]) + + if self.cmdstate == 256 + 4: # TODO: If CS# got de-asserted. + # s = ', '.join(map(hex, self.data)) + s = ''.join(map(chr, self.data)) + self.putx([0, ['Read data: %s' % s]]) + self.data = [] + self.state = IDLE + return + + self.cmdstate += 1 + def decode(self, ss, es, data): ptype, mosi, miso = data @@ -322,6 +353,8 @@ class Decoder(srd.Decoder): self.handle_rdsr(mosi, miso) elif self.state == CMD_PP: self.handle_pp(mosi, miso) + elif self.state == CMD_READ: + self.handle_read(mosi, miso) else: self.put(0, 0, self.out_ann, [0, ['Unknown command: 0x%02x' % cmd]]) self.state = IDLE |