diff options
Diffstat (limited to 'decoders/spi/pd.py')
| -rw-r--r-- | decoders/spi/pd.py | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/decoders/spi/pd.py b/decoders/spi/pd.py index 09b5689..3040ed2 100644 --- a/decoders/spi/pd.py +++ b/decoders/spi/pd.py @@ -20,6 +20,9 @@ ## import sigrokdecode as srd +from collections import namedtuple + +Data = namedtuple('Data', ['ss', 'es', 'val']) ''' OUTPUT_PYTHON format: @@ -38,6 +41,9 @@ Packet: Both data items are Python numbers (0/1), not strings. At the beginning of the decoding a packet is generated with <data1> = None and <data2> being the initial state of the CS# pin or None if the chip select pin is not supplied. + - 'TRANSFER': <data1>/<data2> contain a list of Data() namedtuples for each + byte transferred during this block of CS# asserted time. Each Data() has + fields ss, es, and val. Examples: ['CS-CHANGE', None, 1] @@ -51,6 +57,8 @@ Examples: ['DATA', 0xa8, None] ['DATA', None, 0x55] ['CS-CHANGE', 0, 1] + ['TRANSFER', [Data(ss=80, es=96, val=0xff), ...], + [Data(ss=80, es=96, val=0x3a), ...]] ''' # Key: (CPOL, CPHA). Value: SPI mode. @@ -123,8 +131,11 @@ class Decoder(srd.Decoder): self.misodata = self.mosidata = 0 self.misobits = [] self.mosibits = [] + self.misobytes = [] + self.mosibytes = [] self.ss_block = -1 self.samplenum = -1 + self.ss_transfer = -1 self.cs_was_deasserted = False self.oldcs = None self.oldpins = None @@ -162,6 +173,11 @@ class Decoder(srd.Decoder): self.put(ss, es, self.out_python, ['BITS', si_bits, so_bits]) self.put(ss, es, self.out_python, ['DATA', si, so]) + if self.have_miso: + self.misobytes.append(Data(ss=ss, es=es, val=so)) + if self.have_mosi: + self.mosibytes.append(Data(ss=ss, es=es, val=si)) + # Bit annotations. if self.have_miso: for bit in self.misobits: @@ -253,6 +269,15 @@ class Decoder(srd.Decoder): self.put(self.samplenum, self.samplenum, self.out_python, ['CS-CHANGE', self.oldcs, cs]) self.oldcs = cs + + if self.cs_asserted(cs): + self.ss_transfer = self.samplenum + self.misobytes = [] + self.mosibytes = [] + else: + self.put(self.ss_transfer, self.samplenum, self.out_python, + ['TRANSFER', self.mosibytes, self.misobytes]) + # Reset decoder state when CS# changes (and the CS# pin is used). self.reset_decoder_state() |