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Add SPI mode switch if init fails #4

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Merged
merged 2 commits into from
Jul 16, 2018
Merged

Add SPI mode switch if init fails #4

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9c6776d
add SPI mode switch if init fails - set deafult SPI baudrate to 1Mhz
jerryneedell Jul 13, 2018
10d315c
pylint fix
jerryneedell Jul 13, 2018
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22 changes: 15 additions & 7 deletions adafruit_stmpe610.py
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Original file line number Diff line number Diff line change
Expand Up @@ -135,11 +135,7 @@ class Adafruit_STMPE610:
A driver for the STMPE610 Resistive Touch sensor.
"""
def __init__(self):
"""Check the STMPE610 was found"""
# Check device version.
version = self.get_version
if _STMPE_VERSION != version:
raise RuntimeError('Failed to find STMPE610! Chip Version 0x%x' % version)
"""Reset the controller"""
self._write_register_byte(_STMPE_SYS_CTRL1, _STMPE_SYS_CTRL1_RESET)
time.sleep(.001)

Expand Down Expand Up @@ -257,6 +253,10 @@ def __init__(self, i2c, address=_STMPE_ADDR):
"""
import adafruit_bus_device.i2c_device as i2c_device
self._i2c = i2c_device.I2CDevice(i2c, address)
# Check device version.
version = self.get_version
if _STMPE_VERSION != version:
raise RuntimeError('Failed to find STMPE610! Chip Version 0x%x' % version)
super().__init__()

def _read_register(self, register, length):
Expand All @@ -278,12 +278,20 @@ class Adafruit_STMPE610_SPI(Adafruit_STMPE610):
"""
SPI driver for the STMPE610 Resistive Touch sensor.
"""
def __init__(self, spi, cs, baudrate=100000):
def __init__(self, spi, cs, baudrate=1000000):
"""
Check the STMPE610 was found,Default clock rate is 100000 but can be changed with 'baudrate'
Check the STMPE610 was found,Default clock rate 1000000 - can be changed with 'baudrate'
"""
import adafruit_bus_device.spi_device as spi_device
self._spi = spi_device.SPIDevice(spi, cs, baudrate=baudrate)
# Check device version.
version = self.get_version
if _STMPE_VERSION != version:
# if it fails try SPI MODE 1 -- that is what Arduino does
self._spi = spi_device.SPIDevice(spi, cs, baudrate=baudrate, polarity=0, phase=1)
version = self.get_version
if _STMPE_VERSION != version:
raise RuntimeError('Failed to find STMPE610! Chip Version 0x%x' % version)
super().__init__()

def _read_register(self, register, length):
Expand Down