diff options
Diffstat (limited to 'decoders/spiflash/pd.py')
| -rw-r--r-- | decoders/spiflash/pd.py | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/decoders/spiflash/pd.py b/decoders/spiflash/pd.py index 07934c5..1263cd8 100644 --- a/decoders/spiflash/pd.py +++ b/decoders/spiflash/pd.py @@ -25,8 +25,8 @@ L = len(cmds) # Don't forget to keep this in sync with 'cmds' is lists.py. class Ann: WRSR, PP, READ, WRDI, RDSR, WREN, FAST_READ, SE, RDSCUR, WRSCUR, \ - RDSR2, CE, ESRY, DSRY, REMS, RDID, RDP_RES, CP, ENSO, DP, READ2X, \ - EXSO, CE2, BE, REMS2, \ + RDSR2, CE, ESRY, DSRY, WRITE1, WRITE2, REMS, RDID, RDP_RES, CP, ENSO, DP, \ + READ2X, EXSO, CE2, STATUS, BE, REMS2, \ BIT, FIELD, WARN = range(L + 3) def cmd_annotation_classes(): @@ -273,6 +273,30 @@ class Decoder(srd.Decoder): self.data.append(miso) self.cmdstate += 1 + def handle_write_common(self, mosi, miso, ann): + # Write data bytes: Master asserts CS#, sends WRITE command, sends + # 3-byte address, writes >= 1 data bytes, de-asserts CS#. + if self.cmdstate == 1: + # Byte 1: Master sends command ID. + self.emit_cmd_byte() + elif self.cmdstate in (2, 3, 4): + # Bytes 2/3/4: Master sends write address (24bits, MSB-first). + self.emit_addr_bytes(mosi) + elif self.cmdstate >= 5: + # Bytes 5-x: Master writes data bytes (until CS# de-asserted). + self.es_field = self.es # Will be overwritten for each byte. + if self.cmdstate == 5: + self.ss_field = self.ss + self.on_end_transaction = lambda: self.output_data_block('Data', ann) + self.data.append(mosi) + self.cmdstate += 1 + + def handle_write1(self, mosi, miso): + self.handle_write_common(mosi, miso, Ann.WRITE1) + + def handle_write2(self, mosi, miso): + self.handle_write_common(mosi, miso, Ann.WRITE2) + def handle_fast_read(self, mosi, miso): # Fast read: Master asserts CS#, sends FAST READ command, sends # 3-byte address + 1 dummy byte, reads >= 1 data bytes, de-asserts CS#. @@ -324,6 +348,20 @@ class Decoder(srd.Decoder): self.data.append(b2) self.cmdstate += 1 + def handle_status(self, mosi, miso): + if self.cmdstate == 1: + # Byte 1: Master sends command ID. + self.emit_cmd_byte() + self.on_end_transaction = lambda: self.putc([Ann.STATUS, [cmds[self.state][1]]]) + else: + # Will be overwritten for each byte. + self.es_cmd = self.es + self.es_field = self.es + if self.cmdstate == 2: + self.ss_field = self.ss + self.putx([Ann.BIT, ['Status register byte %d: 0x%02x' % ((self.cmdstate % 2) + 1, miso)]]) + self.cmdstate += 1 + # TODO: Warn/abort if we don't see the necessary amount of bytes. # TODO: Warn if WREN was not seen before. def handle_se(self, mosi, miso): |