Python • Re: Where are docs for gpiod python bindings (SOLVED)

Code:

#!/bin/python'''Updated to use gpiod Version 2.3.0Connect 1k between SENS and TRIG GPIO pins.GPL'''import threadingimport timeimport gpiodfrom gpiod.line import Direction, Value, Edgeimport statistics as stCONSUMER = "Consumer"GPIO_CHIP = "/dev/gpiochip0"SENS = 17TRIG = 18SLEEP_TIME = 100.0/1000000.0 ## 100 usecNSEC_PER_SEC = 1000000000.0tup = tdown = 0 ## trigger timeeup = edown = 0 ## event timeidata = []tdata = []def thread_function(chip, stop_event):    global eup, edown, idata    request = gpiod.request_lines(GPIO_CHIP,                                  consumer='thread',                                  config = {                                      SENS: gpiod.LineSettings(                                          direction=Direction.INPUT,                                          edge_detection=Edge.BOTH                                      )                                  },  )    retry = 10    while (retry > 0) and (not stop_event.is_set()):        ##rc = chip.wait_info_event(timeout=11000000.0/1000000000) ## 11 msec        rc = request.wait_edge_events(timeout=11000000.0/1000000000) ## 11 msec        if rc and not stop_event.is_set():            retry = 10            ##event = chip.read_info_event()            event = request.read_edge_events()            ##print(event[0])            ##print(type(event[0]))            ##print(event[0].event_type, event[0].timestamp_ns, event[0].global_seqno, event[0].line_seqno)            if event[0].event_type == gpiod.edge_event.EdgeEvent.Type.RISING_EDGE:                eup = (event[0].timestamp_ns) / NSEC_PER_SEC            else:                edown = (event[0].timestamp_ns) / NSEC_PER_SEC                idata.append(edown - eup)def show_stats(name, data):    minv = min(data)    maxv = max(data)    meanv = st.mean(data)    stdev = st.stdev(data)    s = name + ':      '    s = s[:6]    s += ' min {:.6f} mean {:.6f} max {:.6f} stddev {:.6f}'    print(s.format(minv, meanv, maxv, stdev))    def main():    chip = gpiod.Chip(GPIO_CHIP)    num_loops = 100    now = time.time()    print('Running {} trials starting at {} seconds.'.format(num_loops, now))    print('Timing up {} down {} period {} seconds'.format(SLEEP_TIME, SLEEP_TIME, 2*SLEEP_TIME))        stop_event = threading.Event()    th = threading.Thread(target=thread_function, args=(chip,stop_event, ))    th.start()    time.sleep(1)    request = gpiod.request_lines(GPIO_CHIP, consumer='main',                                  config={                                      TRIG: gpiod.LineSettings(                                          direction=Direction.OUTPUT,                                          output_value=Value.ACTIVE                                      )                                  }, )       for idx in range(num_loops):        try:            tup = time.time()            request.set_value(TRIG, Value.ACTIVE)            time.sleep(SLEEP_TIME)            tdown = time.time()            request.set_value(TRIG, Value.INACTIVE)            tdata.append(tdown - tup)            time.sleep(SLEEP_TIME)        except KeyboardInterrupt:            print('Program interrupted by user. Waiting for cleanup...')    stop_event.set()               ##print(idata)    if len(idata) > 0:        ##print('idata len {}'.format(len(idata)))        show_stats('event', idata)    if len(tdata) > 0:        ##print('tdata len {}'.format(len(tdata)))        show_stats('trig ', tdata)        th.join()  ## wait for thread to exit    request.set_value(TRIG, Value.INACTIVE) ## leave line at boot value    chip.close() ## exit gpiodif __name__ == '__main__':    main()