mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-05 06:59:01 +00:00
39 lines
1.2 KiB
Python
39 lines
1.2 KiB
Python
'''SerialTransport implements wire transport over serial port.'''
|
|
|
|
# Local serial port loopback: socat PTY,link=COM8 PTY,link=COM9
|
|
|
|
import serial
|
|
from select import select
|
|
from transport import Transport
|
|
|
|
class SerialTransport(Transport):
|
|
def __init__(self, device, *args, **kwargs):
|
|
self.serial = None
|
|
super(SerialTransport, self).__init__(device, *args, **kwargs)
|
|
|
|
def _open(self):
|
|
self.serial = serial.Serial(self.device, 115200, timeout=10, writeTimeout=10)
|
|
|
|
def _close(self):
|
|
self.serial.close()
|
|
self.serial = None
|
|
|
|
def ready_to_read(self):
|
|
rlist, _, _ = select([self.serial], [], [], 0)
|
|
return len(rlist) > 0
|
|
|
|
def _write(self, msg):
|
|
try:
|
|
self.serial.write(msg)
|
|
self.serial.flush()
|
|
except serial.SerialException:
|
|
print "Error while writing to socket"
|
|
raise
|
|
|
|
def _read(self):
|
|
try:
|
|
(msg_type, datalen) = self._read_headers(self.serial)
|
|
return (msg_type, self.serial.read(datalen))
|
|
except serial.SerialException:
|
|
print "Failed to read from device"
|
|
raise |