srd: rename srd_usb to what it thinks it's called

[libsigrokdecode.git] / decoders / ddc.py

diff --git a/decoders/ddc.py b/decoders/ddc.py
index 4b6cf6a7884cbbe6af7798e4b093063250c3739a..2336159d70f84d0f12d24addbf13f6db6604ef30 100644 (file)
--- a/decoders/ddc.py
+++ b/decoders/ddc.py
@@ -16,16 +16,13 @@
 ## You should have received a copy of the GNU General Public License
 ## along with this program; if not, If not, see <http://www.gnu.org/licenses/>.
 ##
+"""
+This decoder extracts a DDC stream from an I2C session between a computer
+and a display device. The stream is output as plain bytes.
 
-#
-# DDC protocol decoder
-#
-# This decoder extracts a DDC stream from an I2C session between a computer
-# and a display device. The stream is output as plain bytes.
-#
-# Details:
-# https://en.wikipedia.org/wiki/Display_Data_Channel
-#
+Details:
+https://en.wikipedia.org/wiki/Display_Data_Channel
+"""
 
 import sigrokdecode as srd
 
@@ -35,10 +32,13 @@ class Decoder(srd.Decoder):
     longname = 'Display Data Channel'
     desc = 'A protocol for communication between computers and displays.'
     longdesc = ''
-    author = 'Bert Vermeulen <bert@biot.com>'
+    author = 'Bert Vermeulen'
+    email = 'bert@biot.com'
     license = 'gplv3+'
     inputs = ['i2c']
     outputs = ['ddc']
+    probes = []
+    options = {}
     annotations = [
         ['Byte stream', 'DDC byte stream as read from display.'],
     ]
@@ -49,18 +49,18 @@ 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 +68,8 @@ 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]])