import serial
from ... drivers.return_codes import RETURN_CODES
from ... util import log, util
[docs]def send_packet(cmd, size, dev, baudrate, timeout, more_data=None):
packet = util.generate_header(cmd, size)
if more_data:
packet.append(more_data)
com = serial.Serial(dev, baudrate=baudrate, timeout=timeout)
com.write(packet)
code = read_byte(com)
ok = (code == RETURN_CODES.SUCCESS)
return com, code, ok
[docs]def read_byte(com):
try:
resp = com.read(1)
if resp:
return ord(resp)
except Exception as e:
log.error('Serial exception %s in read', e)