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drivers: cst816s: Handle a failure to sleep

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Exceptions on th sleep path more or less kill the device (it is half
alseep and is not on... but not off enough for the power button to work.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>
This commit is contained in:
Daniel Thompson 2020-08-15 20:40:26 +01:00
parent 34ca73ee60
commit 44ba8ebd22
1 changed files with 6 additions and 2 deletions
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8
wasp/drivers/cst816s.py
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@ -87,10 +87,14 @@ class CST816S:
def sleep(self):
"""Put touch controller chip on sleep mode to save power.
"""
# Before we can sent the sleep command we have to reset the
# Before we can send the sleep command we have to reset the
# panel to get the I2C hardware running again...
self._reset()
self.i2c.writeto_mem(21, 0xa5, b'\x03')
try:
self.i2c.writeto_mem(21, 0xa5, b'\x03')
except:
# If we can't power down then let's just put it in reset instead
self.tp_rst.off()
# Ensure get_event() cannot return anything
self.event[0] = 0