tillitis-key/hw/boards/mta1-usb-v1/test/connected_test.py

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Python
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2022-09-19 02:51:11 -04:00
#!/usr/bin/env python3
import hid_test
def import_pins(pin_filename):
pins = {}
with open(pin_filename + '.csv','r') as f:
for line in f.readlines():
[gpio,name] = line.strip().split(',')
pins[name] = int(gpio)
return pins
def read_pin_states(pins):
d = hid_test.ice40_flasher()
# Set all pins as inputs, pull-down
for [name,gpio] in pins.items():
d.gpio_set_direction(gpio,False)
d.gpio_set_pulls(gpio,False,True)
# One by one, set each pin as an output, read the states of all pins, then set the pin as an input again.
changes = {}
for [name,gpio] in pins.items():
pre = d.gpio_get_all()
d.gpio_set_direction(gpio,True)
d.gpio_put(gpio,True)
mid = d.gpio_get_all()
d.gpio_set_direction(gpio,False)
post = d.gpio_get_all()
if (pre != 0) or (post != 0):
print('Error in pre/post condition, pin:{:} pre:{:08x} post:{:08x}'.format(name,pre,post))
change = []
for [n,g] in pins.items():
if (1<<g) & mid:
change.append(n)
changes[name] = change
# Set all pins as inputs with no pulls
for [name,gpio] in pins.items():
d.gpio_set_direction(gpio,False)
d.gpio_set_pulls(gpio,False,False)
return changes
def read_pin_changes(pin_filename):
changes_good = {}
with open(pin_filename + '-good.csv','r') as f:
for line in f.readlines():
[name,change] = line.strip().split(',')
# Handle empty change lists
if change == '':
changes_good[name] = []
else:
changes_good[name] = change.split(' ')
return changes_good
def save_pin_changes(pin_filename, changes):
with open(pin_filename + '-good.csv','w') as f:
for [pin, change] in changes.items():
f.write('{:},{:}\n'.format(pin, ' '.join([i for i in change])))
def check_changes(changes, changes_good):
issues = []
for [pin, change] in changes.items():
if change != changes_good[pin]:
issue = 'error:' + pin
#issue += ' got:[' + ','.join([i for i in change]) + ']'
#issue += ' expected:[' + ','.join([i for i in changes_good[pin]]) + ']'
issue += ' missing:[' + ','.join([x for x in changes_good[pin] if x not in change]) + ']'
issue += ' extra:[' + ','.join([x for x in change if x not in changes_good[pin]]) + ']'
issues.append(issue)
return issues
def record(pin_filename):
pins = import_pins(pin_filename)
changes = read_pin_states(pins)
save_pin_changes(pin_filename, changes)
def test(pin_filename):
pins = import_pins(pin_filename)
changes_good = read_pin_changes(pin_filename)
changes = read_pin_states(pins)
return check_changes(changes, changes_good)
if __name__ == '__main__':
import argparse
parser = argparse.ArgumentParser(description='GPIO short connector test')
parser.add_argument('-pins', required=True, help='CSV file of pins to test')
parser.add_argument('-r', '--record', action='store_true', help='Set to record a known good board')
args = parser.parse_args()
if args.record:
record(args.pins)
else:
print('\n'.join(test(args.pins)))