diff options
Diffstat (limited to 'firmware/offset_test.py')
| -rw-r--r-- | firmware/offset_test.py | 45 |
1 files changed, 29 insertions, 16 deletions
diff --git a/firmware/offset_test.py b/firmware/offset_test.py index 5f87d20..fca565b 100644 --- a/firmware/offset_test.py +++ b/firmware/offset_test.py @@ -7,18 +7,18 @@ from datetime import datetime from pyBusPirateLite import Buspirate -AVERAGE_READINGS = 16 - if __name__ == '__main__': import argparse parser = argparse.ArgumentParser() parser.add_argument('channels', type=str, help='olsndot channels to test, format: 0-3,5,7,8-10') - parser.add_argument('run_name') + parser.add_argument('run_name', nargs='?', default=None) parser.add_argument('olsndot_port', nargs='?', default='/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A50285BI-if00-port0') - parser.add_argument('buspirate_port', nargs='?', default='/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_AD01W1RF-if00-port0') # FIXME - parser.add_argument('-d', '--database', nargs='?', default='results.sqlite3', help='sqlite3 database file to store results in') - parser.add_argument('-m', '--mac', type=int, nargs='?', default=0xDEBE10BB, help='olsndot MAC address') + parser.add_argument('buspirate_port', nargs='?', default='/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_AD01W1RF-if00-port0') + parser.add_argument('-d', '--database', default='results.sqlite3', help='sqlite3 database file to store results in') + parser.add_argument('-m', '--mac', type=int, default=0xDEBE10BB, help='olsndot MAC address') + parser.add_argument('-w', '--wait', type=float, default=0.1, help='time to wait between samples in seconds') + parser.add_argument('-o', '--oversample', type=int, default=16, help='oversampling ratio') args = parser.parse_args() def parse_channels(channels): @@ -55,25 +55,38 @@ if __name__ == '__main__': uut = Olsndot(args.mac) d = Driver(args.olsndot_port, devices=[uut]) - + uut.send_framebuf([0]*uut.nchannels) print('Connected to uut:', uut) + run_name = args.run_name + if args.run_name is None: + names = [ n[4:] for n, in db.execute('SELECT name FROM runs WHERE name LIKE "test%"').fetchall() ] + run_name = 'test{}'.format(1+max(int(n) if str.isnumeric(n) else 0 for n in names)) with db: cur = db.cursor() cur.execute('INSERT INTO runs(name, uut_mac, timestamp) VALUES (?, ?, ?)', - (args.run_name, args.mac, time.time())) + (run_name, args.mac, time.time())) run_id = cur.lastrowid - print('Starting run {} at {:%y-%m-%d %H:%M:%S:%f}'.format(run_id, datetime.now())) + print('Starting run {} "{}" at {:%y-%m-%d %H:%M:%S:%f}'.format(run_id, run_name, datetime.now())) print('mac={:08x} channels={}'.format(args.mac, ','.join('{:02d}'.format(ch) for ch in channels))) print('[measurement id] " " [hex setpoint value] "(" [float duty cycle] ")" " " [reading (V)]') + # zero cal + uut.send_framebuf([0]*uut.nchannels) + time.sleep(args.wait) + readings = [ bp.adc_value for _ in range(args.oversample) ] + mean, stdev = statistics.mean(readings), statistics.stdev(readings) + cur.execute(''' + INSERT INTO measurements ( + run_id, channel, duty_cycle, voltage, voltage_stdev, timestamp + ) VALUES (?, -1, 0, ?, ?, ?)''', + (run_id, mean, stdev, time.time())) + print('Zero cal: {:5.4f}V stdev={:5.4f}V'.format(mean, stdev)) + for ch in channels: - for i in range(-1, uut.nbits): + for i in range(uut.nbits): fb = [0]*uut.nchannels - if i == -1: - val = 0 - else: - val = 1<<i + val = 1<<i duty_cycle = val/(2**uut.nbits) extra_shift = 16-uut.nbits val <<= extra_shift @@ -81,8 +94,8 @@ if __name__ == '__main__': fb[ch] = val uut.send_framebuf(fb) - time.sleep(0.2) - readings = [ bp.adc_value for _ in range(AVERAGE_READINGS) ] + time.sleep(args.wait) + readings = [ bp.adc_value for _ in range(args.oversample) ] mean, stdev = statistics.mean(readings), statistics.stdev(readings) with db: |