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Update SPI _wakeup to come out of power_down

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`_wakeup` also puts the pn532 back into normal mode.

Also removed some delays that aren't necessary.
This commit is contained in:
George Waters 2020-08-30 21:36:06 -04:00
parent cdedaf16b9
commit 80df78725f
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GPG key ID: D993F8B1CC21DB25
1 changed files with 7 additions and 7 deletions
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14
adafruit_pn532/spi.py
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@ -67,16 +67,19 @@ class PN532_SPI(PN532):
def __init__(self, spi, cs_pin, *, irq=None, reset=None, debug=False):
"""Create an instance of the PN532 class using SPI"""
self.debug = debug
self._irq = irq
self._spi = spi_device.SPIDevice(spi, cs_pin)
super().__init__(debug=debug, reset=reset)
super().__init__(debug=debug, irq=irq, reset=reset)
def _wakeup(self):
"""Send any special commands/data to wake up PN532"""
if self._reset_pin:
self._reset_pin.value = True
time.sleep(0.01)
with self._spi as spi:
time.sleep(1)
spi.write(bytearray([0x00])) # pylint: disable=no-member
time.sleep(1)
time.sleep(0.01)
self.low_power = False
self.SAM_configuration() # Put the PN532 back in normal mode
def _wait_ready(self, timeout=1):
"""Poll PN532 if status byte is ready, up to `timeout` seconds"""
@ -85,7 +88,6 @@ class PN532_SPI(PN532):
timestamp = time.monotonic()
with self._spi as spi:
while (time.monotonic() - timestamp) < timeout:
time.sleep(0.02) # required
spi.write_readinto(
status_cmd, status_response
) # pylint: disable=no-member
@ -103,7 +105,6 @@ class PN532_SPI(PN532):
frame[0] = reverse_bit(_SPI_DATAREAD)
with self._spi as spi:
time.sleep(0.02) # required
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
@ -119,5 +120,4 @@ class PN532_SPI(PN532):
if self.debug:
print("Writing: ", [hex(i) for i in rev_frame])
with self._spi as spi:
time.sleep(0.02) # required
spi.write(bytes(rev_frame)) # pylint: disable=no-member