def init_servos(address):
i2c_helper = ABEHelpers()
bus = i2c_helper.get_smbus()
pwm = PWM(bus, address)
pwm.set_pwm_freq(60)
pwm.output_enable()
# cycle the arms on channels 0, 2, 4
print('cycling through all valid positions')
for x in (175, 300, 425, 550):
pwm.set_pwm(0, 0, x)
sleep(1)
pwm.set_pwm(2, 0, x)
sleep(1)
pwm.set_pwm(4, 0, x)
sleep(2)
return pwm
================================================
ABElectronics Servo Pi pwm controller | PWM output demo
Version 1.0 18/11/2014
run with: sudo python demo-pwm.py
================================================
This demo shows how to set a 1KHz output frequency and change the pulse width
between the minimum and maximum values
"""
# create an instance of the ABEHelpers class and use it
# to find the correct i2c bus
i2c_helper = ABEHelpers()
bus = i2c_helper.get_smbus()
# create an instance of the PWM class on i2c address 0x40
pwm = PWM(bus, 0x40)
# Set PWM frequency to 1 Khz and enable the output
pwm.set_pwm_freq(1000)
pwm.output_enable()
while (True):
for x in range(1, 4095, 5):
pwm.set_pwm(0, 0, x)
#time.sleep(0.01)
for x in range(4095, 1, -5):
pwm.set_pwm(0, 0, x)
#time.sleep(0.01)
