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basic_main.py
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basic_main.py
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import sys
import hid
import ld_series
from time import sleep, time_ns
from system_stat import get_stats
class HidDevice:
def __init__(self, vid, pid, serial=None):
self.vid, self.pid = vid, pid
self.serial = serial
self.device = None
def __enter__(self):
self.device = hid.device()
self.device.open(self.vid, self.pid, self.serial)
self.device.set_nonblocking(1)
return self
def __exit__(self, exc_type, exc_value, traceback):
if self.device is not None:
self.device.close()
self.device = None
def write(self, report):
self.write_multiple([report])
def write_multiple(self, reports):
"""write multiple report packets in quick succession"""
if self.device is None:
raise RuntimeError('device has not been opened')
for report in reports:
self.device.write(report)
if __name__ == '__main__':
ONE_SEC_NS = 10**9
try:
with HidDevice(ld_series.VID, ld_series.PID) as device:
device.write_multiple(ld_series.INIT_SEQUENCE)
next_send_time = 0
while True:
if (time_ns() >= next_send_time):
stats = get_stats(get_power=False)
report = ld_series.make_report(**stats)
device.write(report)
print(f"sent {stats}", file=sys.stderr)
next_send_time = time_ns() + ONE_SEC_NS
sleep(0.01)
except KeyboardInterrupt:
print('ctrl-c received, exiting', file=sys.stderr)