Test script to write a telemetry command and read a response from the Wilco EC

telem_test.py

#!/usr/bin/python
# https://gist.github.com/NickCrews/52ab07c8519b56c0ec671d3338760516

import os, glob

def test(bytes):
        fname = glob.glob("/dev/wilco_telem*")[0]

        fd = None

        try:
                fd = os.open(fname, os.O_RDWR)
                bytes = [chr(n) for n in bytes]
                print "=" * 80
                print "writing to file: %s " % " ".join(n.encode("hex") for n in bytes)
                ret = os.write(fd, ''.join(bytes))
                print "write() returned: %d " % ret
                try:
                        bytes = os.read(fd, 32)
                        print "read from file: %s " % " ".join(n.encode("hex") for n in bytes)
                except Exception as e:
                        print "failed reading: ", e
        except Exception as e:
                print "failed writing: ", e
        finally:
                if (fd):
                        os.close(fd)


test(range(32))
test(range(100))
test([])
test([0])
test([0x38, 0, 3])
test([0x38, 0])
test([0x38, 1, 3])
test([0x38, 0, 2])
test([0x39, 0, 3])
test([0x38, 0, 3, 0])

test([0x2C, 0, 0, 0])
test([0x2C, 0, 0])
test([0x2C, 0, 1])
test([0x2C, 0, 2])
test([0x2C, 0, 3])
test([0x2C, 0, 4])

test([0x8A, 0, 1])
test([0x8A, 0, 4])