[sigrok-devel] sigrok sniffing a low-speed device problem

[Xiangfu L. <xi...@op...>]

Hi

Before run those[1] commands I applied this patch[2], but all I got is
  BIT STUFF ERROR or RESET

Is the usb decode support low-speed device? attach is the sigrok output file.

Xiangfu

[1]
rm -f usb-low-speed.sr
sigrok-cli -d 0:samplerate=24mhz --time 1s -o usb-low-speed.sr --probes 1,2
sigrok-cli  -i usb-low-speed.sr -a  usb:dp=1:dm=0
usb: "BIT STUFF ERROR"
usb: "BIT STUFF ERROR"
usb: "BIT STUFF ERROR"
usb: "BIT STUFF ERROR"
usb: "BIT STUFF ERROR"
usb: "BIT STUFF ERROR"
usb: "BIT STUFF ERROR"
usb: "BIT STUFF ERROR"
usb: "BIT STUFF ERROR"
usb: "BIT STUFF ERROR"
...

[2]
/usr/local/share/libsigrokdecode/decoders/usb$ diff -Naur usb.py.backup usb.py
--- usb.py.backup       2012-06-14 16:52:30.361873504 +0800
+++ usb.py      2012-06-14 16:53:07.985873504 +0800
@@ -109,9 +109,9 @@
      def start(self, metadata):
          self.samplerate = metadata['samplerate']

-        if self.samplerate < 48000000:
-            raise Exception('Samplerate (%d) not sufficient for USB '
-                            'decoding, need at least 48MHz' % self.samplerate)
+        #if self.samplerate < 48000000:
+        #    raise Exception('Samplerate (%d) not sufficient for USB '
+        #                    'decoding, need at least 48MHz' % self.samplerate)

          # self.out_proto = self.add(srd.OUTPUT_PROTO, 'usb')
          self.out_ann = self.add(srd.OUTPUT_ANN, 'usb')