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-rw-r--r--firmware/offset_test.py131
1 files changed, 0 insertions, 131 deletions
diff --git a/firmware/offset_test.py b/firmware/offset_test.py
deleted file mode 100644
index f2b8b2f..0000000
--- a/firmware/offset_test.py
+++ /dev/null
@@ -1,131 +0,0 @@
-#!/usr/bin/env python3
-
-import time
-import statistics
-import sqlite3
-from olsndot import Olsndot, Driver
-from datetime import datetime
-
-from pyBusPirateLite import Buspirate
-
-if __name__ == '__main__':
- import argparse
-
- parser = argparse.ArgumentParser()
- parser.add_argument('run_name', nargs='?', default='auto')
- 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')
- parser.add_argument('-c', '--channels', nargs='?', default='auto', help='olsndot channels to test, format: 0-3,5,7,8-10')
- 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')
- parser.add_argument('-b', '--bits', type=int, default=None, help='number of bits to sample')
- args = parser.parse_args()
-
- db = sqlite3.connect(args.database)
- db.execute("""
- CREATE TABLE IF NOT EXISTS runs (
- run_id INTEGER PRIMARY KEY,
- name TEXT,
- comment TEXT,
- uut_mac TEXT, -- hex-string formatted 32-bit mac of the uut
- timestamp REAL -- unix timestamp in fractional seconds
- )""")
- db.execute("""
- CREATE TABLE IF NOT EXISTS measurements (
- measurement_id INTEGER PRIMARY KEY,
- run_id INTEGER,
- channel INTEGER,
- duty_cycle REAL, -- setpoint duty cycle as a float between 0.0 and 1.0
- voltage REAL, -- volts
- voltage_stdev REAL, -- volts
- timestamp REAL, -- unix timestamp in fractional seconds
- FOREIGN KEY (run_id) REFERENCES runs)""")
-
- bp = Buspirate(args.buspirate_port)
- bp.power_on = True
-
- uut = Olsndot(args.mac)
- d = Driver(args.olsndot_port, devices=[uut])
- print('Connected to uut:', uut)
-
- run_name = args.run_name
- if not str.isnumeric(args.run_name[-1]):
- names = [ n[len(run_name):] for n, in db.execute(
- 'SELECT name FROM runs WHERE name LIKE ?||"%"', (run_name,)).fetchall() ]
- names.append('0') # in case we get no results
- run_name += str(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 (?, ?, ?)',
- (run_name, args.mac, time.time()))
- run_id = cur.lastrowid
-
- nbits = args.bits if args.bits is not None else uut.nbits
-
- def parse_channels(channels):
- for spec in channels.split(','):
- if str.isnumeric(spec):
- yield int(spec)
- else:
- low, high = spec.split('-')
- yield from range(int(low), int(high)+1)
- if args.channels == 'auto':
- for i in range(uut.nchannels):
- fb = [0]*uut.nchannels
- fb[i] = 0xffff;
- uut.send_framebuf(fb)
- time.sleep(0.2)
- if bp.adc_value > 0.5:
- break;
- else:
- raise ValueError('Cannot find active channel')
- channels = [i]
- else:
- channels = list(parse_channels(args.channels))
-
- 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) ]
- zero_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, zero_mean, stdev, time.time()))
- print('Zero cal: {:5.4f}V stdev={:5.4f}V'.format(zero_mean, stdev))
-
- for ch in channels:
- for i in range(nbits):
- fb = [0]*uut.nchannels
- val = 1<<i
- duty_cycle = val/(2**uut.nbits)
- extra_shift = 16-uut.nbits
- val <<= extra_shift
-
- fb[ch] = val
- uut.send_framebuf(fb)
-
- time.sleep(args.wait)
- readings = [ bp.adc_value for _ in range(args.oversample) ]
- mean, stdev = statistics.mean(readings), statistics.stdev(readings)
-
- with db:
- cur = db.cursor()
- cur.execute('''
- INSERT INTO measurements (
- run_id, channel, duty_cycle, voltage, voltage_stdev, timestamp
- ) VALUES (?, ?, ?, ?, ?, ?)''',
- (run_id, ch, duty_cycle, mean, stdev, time.time()))
- print('{:08d} ch={} {:04x}({:6.5f}): {:5.4f} stdev {:5.4f}'.format(
- cur.lastrowid, ch, val, duty_cycle, mean-zero_mean, stdev))
-
- uut.send_framebuf([0]*uut.nchannels)
- bp.power_on = False
-