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Catch Ctrl-C and unlock I2C bus before exiting #1205

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Merged
merged 7 commits into from
Aug 17, 2020
Merged

Catch Ctrl-C and unlock I2C bus before exiting #1205

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9b9afff
Catch Ctrl-C and unlock I2C bus before exiting
hjw Aug 13, 2020
dccfcc1
formatting error
hjw Aug 13, 2020
d65e8d1
Make requested formatting changes for pull
hjw Aug 13, 2020
17aa659
Merge branch 'master' into master
hjw Aug 14, 2020
df7b761
Merge branch 'master' into master
kattni Aug 17, 2020
d0803a8
Merge branch 'master' into master
kattni Aug 17, 2020
0042317
Merge branch 'master' into master
ladyada Aug 17, 2020
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18 changes: 13 additions & 5 deletions CircuitPython_Essentials/CircuitPython_I2C_Scan.py
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Original file line number Diff line number Diff line change
@@ -1,15 +1,23 @@
# CircuitPython demo - I2C scan
#
# If you run this and it seems to hang, try manually unlocking
# your I2C bus from the REPL with
# >>> import board
# >>> board.I2C().unlock()

import time

import board

i2c = board.I2C()

while not i2c.try_lock():
pass

while True:
print("I2C addresses found:", [hex(device_address)
for device_address in i2c.scan()])
time.sleep(2)
try:
while True:
print("I2C addresses found:", [hex(device_address)
for device_address in i2c.scan()])
time.sleep(2)

finally: # unlock the i2c bus when ctrl-c'ing out of the loop
i2c.unlock()