def setup():
global _is_setup, captouch
if _is_setup:
return True
captouch = cap1xxx.Cap1166(i2c_addr=0x2c)
for x in range(6):
captouch.on(x, event='press', handler=_handle_press)
captouch.on(x, event='release', handler=_handle_release)
# Unlink the LEDs since Touch pHAT's LEDs don't match up with the channels
captouch._write_byte(cap1xxx.R_LED_LINKING, 0b00000000)
_is_setup = True
def setup():
"""Set up the touch input on GFX HAT"""
global _cap1166, is_setup
if is_setup:
return
_cap1166 = cap1xxx.Cap1166(i2c_addr=I2C_ADDR)
for x in range(6):
_cap1166.set_led_linking(x, 0)
# Force recalibration
_cap1166._write_byte(0x26, 0b00111111)
_cap1166._write_byte(0x1F, 0b01000000)
is_setup = True
try:
import sn3218
except ImportError:
exit(
"This library requires the sn3218 module\nInstall with: sudo pip install sn3218"
)
try:
import cap1xxx
except ImportError:
exit(
"This library requires the cap1xxx module\nInstall with: sudo pip install cap1xxx"
)
cap = cap1xxx.Cap1166(i2c_addr=0x2C, skip_init=True)
NUM_LEDS = 6
STEP_VALUE = 16
leds = [0x00] * 18 # B G R, B G R, B G R, B G R, B G R, B G R
# set gamma correction for backlight to normalise brightness
g_channel_gamma = [int(value / 1.6) for value in sn3218.default_gamma_table]
r_channel_gamma = [int(value / 1.4) for value in sn3218.default_gamma_table]
for x in range(0, 18, 3):
sn3218.channel_gamma(x + 1, g_channel_gamma)
sn3218.channel_gamma(x + 2, r_channel_gamma)
sn3218.enable()