diff options
| -rw-r--r-- | decoders/mx25lxx05d/pd.py | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/decoders/mx25lxx05d/pd.py b/decoders/mx25lxx05d/pd.py index 9639386..0217de4 100644 --- a/decoders/mx25lxx05d/pd.py +++ b/decoders/mx25lxx05d/pd.py @@ -115,6 +115,9 @@ class Decoder(srd.Decoder): # Simplification, most annotations span exactly one SPI byte/packet. self.put(self.ss, self.es, self.out_ann, data) + def putb(self, data): + self.put(self.block_ss, self.block_es, self.out_ann, data) + def handle_wren(self, mosi, miso): self.putx([0, ['Command: %s' % cmds[self.state][1]]]) self.state = None @@ -204,7 +207,38 @@ class Decoder(srd.Decoder): self.cmdstate += 1 def handle_fast_read(self, mosi, miso): - pass # TODO + # Fast read: Master asserts CS#, sends FAST READ command, sends + # 3-byte address + 1 dummy byte, reads >= 1 data bytes, de-asserts CS#. + if self.cmdstate == 1: + # Byte 1: Master sends command ID. + self.putx([5, ['Command: %s' % cmds[self.state][1]]]) + elif self.cmdstate in (2, 3, 4): + # Bytes 2/3/4: Master sends read address (24bits, MSB-first). + self.putx([24, ['AD%d: 0x%02x' % (self.cmdstate - 1, mosi)]]) + if self.cmdstate == 2: + self.block_ss = self.ss + self.addr |= (mosi << ((4 - self.cmdstate) * 8)) + elif self.cmdstate == 5: + self.putx([24, ['Dummy byte: 0x%02x' % mosi]]) + self.block_es = self.es + self.putb([5, ['Read address: 0x%06x' % self.addr]]) + self.addr = 0 + elif self.cmdstate >= 6: + # Bytes 6-x: Master reads data bytes (until CS# de-asserted). + # TODO: For now we hardcode 32 bytes per FAST READ command. + if self.cmdstate == 6: + self.block_ss = self.ss + if self.cmdstate <= 32 + 5: # TODO: While CS# asserted. + self.data.append(miso) + if self.cmdstate == 32 + 5: # TODO: If CS# got de-asserted. + self.block_es = self.es + s = ' '.join([hex(b)[2:] for b in self.data]) + self.putb([25, ['Read data: %s' % s]]) + self.data = [] + self.state = None + return + + self.cmdstate += 1 def handle_2read(self, mosi, miso): pass # TODO |