## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+## along with this program; if not, see <http://www.gnu.org/licenses/>.
##
import sigrokdecode as srd
# Special
'00111100': ['PRE', 'Host-issued preamble; enables downstream bus traffic to low-speed devices'],
- '00111100': ['ERR', 'Split transaction error handshake'],
+ #'00111100': ['ERR', 'Split transaction error handshake'],
'00011110': ['SPLIT', 'HS split transaction token'],
'00101101': ['PING', 'HS flow control probe for a bulk/control EP'],
'00001111': ['Reserved', 'Reserved PID'],
return reverse_number(crc16, 16)
class Decoder(srd.Decoder):
- api_version = 2
+ api_version = 3
id = 'usb_packet'
name = 'USB packet'
longname = 'Universal Serial Bus (LS/FS) packet'
)
def __init__(self):
+ self.reset()
+
+ def reset(self):
self.bits = []
self.packet = []
self.packet_summary = ''
self.packet.append(pid)
self.packet_summary += pidname
- if pidname in ('OUT', 'IN', 'SOF', 'SETUP', 'PRE', 'PING'):
+ if pidname in ('OUT', 'IN', 'SOF', 'SETUP', 'PING'):
if len(packet) < 32:
self.putp([28, ['Invalid packet (shorter than 32 bits)']])
return
self.packet.append(crc16)
elif pidname in ('ACK', 'NAK', 'STALL', 'NYET', 'ERR'):
pass # Nothing to do, these only have SYNC+PID+EOP fields.
+ elif pidname in ('PRE'):
+ pass # Nothing to do, PRE only has SYNC+PID fields.
else:
pass # TODO: Handle 'SPLIT' and possibly 'Reserved' packets.