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Merge pull request #24 from tgikal/tgikal-SPI-read_passive_target-timeout

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SPI read_passive_target timeout
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Carter Nelson 2019-07-03 14:30:27 -07:00 • committed by GitHub
commit b949e87e1a
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1 changed files with 6 additions and 6 deletions
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12
adafruit_pn532/spi.py
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@ -81,14 +81,14 @@ class PN532_SPI(PN532):
status = bytearray([reverse_bit(_SPI_STATREAD), 0]) status = bytearray([reverse_bit(_SPI_STATREAD), 0])
timestamp = time.monotonic() timestamp = time.monotonic()
while (time.monotonic() - timestamp) < timeout: with self._spi as spi:
with self._spi as spi: while (time.monotonic() - timestamp) < timeout:
time.sleep(0.02) # required time.sleep(0.02) # required
spi.write_readinto(status, status) #pylint: disable=no-member spi.write_readinto(status, status) #pylint: disable=no-member
if reverse_bit(status[1]) == 0x01: # LSB data is read in MSB if reverse_bit(status[1]) == 0x01: # LSB data is read in MSB
return True # Not busy anymore! return True # Not busy anymore!
else: else:
time.sleep(0.01) # pause a bit till we ask again time.sleep(0.01) # pause a bit till we ask again
# We timed out! # We timed out!
return False return False