X-Git-Url: https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=blobdiff_plain;f=decoders%2Fddc.py;h=395f72ff8bcb16643a205ae81c3de2379a3c1caf;hp=4b6cf6a7884cbbe6af7798e4b093063250c3739a;hb=a2d2aff27099449deb1a791b3adc05ee610861e6;hpb=eb7082c98efad727d88e3ebeadcd496fa948475b diff --git a/decoders/ddc.py b/decoders/ddc.py index 4b6cf6a..395f72f 100644 --- a/decoders/ddc.py +++ b/decoders/ddc.py @@ -36,9 +36,12 @@ class Decoder(srd.Decoder): desc = 'A protocol for communication between computers and displays.' longdesc = '' author = 'Bert Vermeulen ' + email = '' license = 'gplv3+' inputs = ['i2c'] outputs = ['ddc'] + probes = [] + options = {} annotations = [ ['Byte stream', 'DDC byte stream as read from display.'], ] @@ -49,18 +52,18 @@ class Decoder(srd.Decoder): def start(self, metadata): self.out_ann = self.add(srd.OUTPUT_ANN, 'ddc') - def decode(self, start_sample, end_sample, i2c_data): + def decode(self, ss, es, data): try: - cmd, data, ack_bit = i2c_data + cmd, data, ack_bit = data except Exception as e: raise Exception('malformed I2C input: %s' % str(e)) from e if self.state is None: # Wait for the DDC session to start. - if cmd in ('START', 'START_REPEAT'): + if cmd in ('START', 'START REPEAT'): self.state = 'start' elif self.state == 'start': - if cmd == 'ADDRESS_READ' and data == 80: + if cmd == 'ADDRESS READ' and data == 80: # 80 is the I2C slave address of a connected display, # so this marks the start of the DDC data transfer. self.state = 'transfer' @@ -68,9 +71,8 @@ class Decoder(srd.Decoder): # Got back to the idle state. self.state = None elif self.state == 'transfer': - if cmd == 'DATA_READ': + if cmd == 'DATA READ': # There shouldn't be anything but data reads on this # address, so ignore everything else. - self.put(start_sample, end_sample, self.out_ann, - [0, ['0x%.2x' % data]]) + self.put(ss, es, self.out_ann, [0, ['0x%.2x' % data]])