You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
1.2 KiB
44 lines
1.2 KiB
import gex
|
|
from gex.Client import EventReport
|
|
|
|
|
|
class USART(gex.Unit):
|
|
"""
|
|
USART
|
|
"""
|
|
|
|
def _type(self):
|
|
return 'USART'
|
|
|
|
def listen(self, handler, decode='utf-8'):
|
|
"""
|
|
Attach a Rx listener callback.
|
|
decode can be: None, 'utf-8', 'ascii' (any valid encoding for bytearray.decode())
|
|
None decoding returns bytearray
|
|
|
|
handler receives args: (bytes, timestamp)
|
|
"""
|
|
self.handler_decode = decode
|
|
self.handler = handler
|
|
|
|
def write(self, payload, sync=False, confirm=True):
|
|
"""
|
|
Write bytes. If 'sync' is True, wait for completion. sync implies confirm
|
|
"""
|
|
|
|
if type(payload) is str:
|
|
payload = payload.encode('utf-8')
|
|
|
|
pb = gex.PayloadBuilder()
|
|
pb.blob(payload) # payload to write
|
|
|
|
self._send(0x01 if sync else 0x00, pb.close(), confirm=confirm or sync)
|
|
|
|
def _on_event(self, evt:EventReport):
|
|
if evt.code == 0:
|
|
# Data received
|
|
if self.handler:
|
|
data = evt.payload if self.handler_decode is None \
|
|
else evt.payload.decode(self.handler_decode)
|
|
|
|
self.handler(data, evt.timestamp)
|
|
|