kumi/MicroPython_PN532
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Fix SPI read_passive_target timeout

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Moving the `with` statement seems to correct the timeout issue.
This commit is contained in:
tgikal 2019-07-01 14:48:24 -04:00 committed by GitHub
parent c44abc207e
commit 3f759879c8
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 13 additions and 13 deletions
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20
adafruit_pn532/spi.py
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@ -76,14 +76,14 @@ class PN532_SPI(PN532):
status = bytearray([reverse_bit(_SPI_STATREAD), 0])
timestamp = time.monotonic()
while (time.monotonic() - timestamp) < timeout:
with self._spi as spi:
#time.sleep(0.02) # required
while (time.monotonic() - timestamp) < timeout:
time.sleep(0.02) # required (not needed when tested on rPi 3)
spi.write_readinto(status, status) #pylint: disable=no-member
if reverse_bit(status[1]) == 0x01: # LSB data is read in MSB
return True # Not busy anymore!
#else:
# time.sleep(0.01) # pause a bit till we ask again
else: # (not needed when tested on rPi 3)
time.sleep(0.01) # pause a bit till we ask again
# We timed out!
return False
@ -95,12 +95,12 @@ class PN532_SPI(PN532):
frame[0] = reverse_bit(_SPI_DATAREAD)
with self._spi as spi:
#time.sleep(0.02) # required
time.sleep(0.02) # required (not needed when tested on rPi 3)
spi.write_readinto(frame, frame) #pylint: disable=no-member
for i, val in enumerate(frame):
frame[i] = reverse_bit(val) # turn LSB data to MSB
#if self.debug:
# print("Reading: ", [hex(i) for i in frame[1:]])
if self.debug:
print("Reading: ", [hex(i) for i in frame[1:]])
return frame[1:]
def _write_data(self, framebytes):
@ -108,8 +108,8 @@ class PN532_SPI(PN532):
# start by making a frame with data write in front,
# then rest of bytes, and LSBify it
rev_frame = [reverse_bit(x) for x in bytes([_SPI_DATAWRITE]) + framebytes]
#if self.debug:
# print("Writing: ", [hex(i) for i in rev_frame])
if self.debug:
print("Writing: ", [hex(i) for i in rev_frame])
with self._spi as spi:
#time.sleep(0.02) # required
time.sleep(0.02) # required (not needed when tested on rPi 3)
spi.write(bytes(rev_frame)) #pylint: disable=no-member