def main():
"""
Run temperature check every 3 seconds untill stopped by user
"""
try:
logging.info('Started fan service...')
setup(PIN)
while True:
temp = get_temp()
check_temp(temp, MIN_TEMP, MAX_TEMP)
sleep(2)
except KeyboardInterrupt:
logging.info('Stopped fan service...')
finally:
fan_switch(GPIO.LOW)
GPIO.cleanup(PIN)
def main():
"""
Run temperature control service
"""
try:
old_temp, old_speed = 0, 0
fan = gpio_setup()
fan.start(MIN_SPEED)
logging.info('Started temperature control service...')
while True:
temp, speed = temp_ctrl(fan, old_temp, old_speed)
old_temp, old_speed = temp, speed
sleep(INTERVAL)
except KeyboardInterrupt:
fan.stop()
logging.info('Stopped temperature control service.')
else:
fan.stop()
logging.error('Unexpected error occurred, please check script.')
finally:
GPIO.cleanup(GPIO_PIN)
p.ChangeDutyCycle(25)
sleep(1)
print("60Hz at 10% duty cycle for 1 second")
p.ChangeDutyCycle(10)
sleep(1)
print("60Hz at 1% duty cycle for 1 second")
p.ChangeDutyCycle(1)
sleep(1)
p.stop()
print("")
print("Testing PWM Output - Frequency - Low Precision:")
print("60Hz at 50% duty cycle for 1 second")
p.start(50, pwm_precision=GPIO.LOW)
sleep(1)
print("30Hz at 50% duty cycle for 1 second")
p.ChangeFrequency(30)
sleep(1)
print("20Hz at 50% duty cycle for 1 second")
p.ChangeFrequency(20)
sleep(1)
print("10Hz at 50% duty cycle for 1 second")
p.ChangeFrequency(10)
sleep(1)
p.stop()
GPIO.cleanup([var_gpio_in, var_gpio_out]) # Perform cleanup on specified GPIOs
print("")
print("Test Complete")
power_pin=18
GPIO.setwarnings(True)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(pwm_pin, GPIO.OUT)
GPIO.setup(power_pin, GPIO.OUT, initial=GPIO.HIGH)
print("Starting PWM output")
p=GPIO.PWM(pwm_pin,50)
p.start(0)
def speed_callback(msg):
num = msg.data
p.ChangeDutyCycle(num)
print("Changing Duty Cycle")
print(num)
if __name__ == "__main__":
rospy.init_node("spinny")
print("Setting up GPIO pins")
sub = rospy.Subscriber('/motor_speed', Int32, speed_callback)
rospy.spin()
p.stop()
GPIO.cleanup()
print("")
print("Testing GPIO Input/Output:")
# Set Variables
var_gpio_out1 = 16
var_gpio_in1 = 18
# GPIO Setup
GPIO.setwarnings(True)
GPIO.setmode(GPIO.BOARD)
# Test Output
GPIO.setup(var_gpio_out1, GPIO.OUT, initial=GPIO.HIGH
) # Set up GPIO as an output, with an initial state of HIGH
var_gpio_state = GPIO.input(var_gpio_out1) # Return state of GPIO
print("Output State : " + str(var_gpio_state)) # Print results
sleep(0.5)
GPIO.output(var_gpio_out1, GPIO.LOW) # Set GPIO to LOW
GPIO.cleanup(var_gpio_out1) # Cleanup GPIO
# Test Input
GPIO.setup(var_gpio_in1, GPIO.IN,
pull_up_down=GPIO.PUD_UP) # Set up GPIO as an input, pullup enabled
var_gpio_state = GPIO.input(var_gpio_in1) # Return state of GPIO
print("Input State : " + str(var_gpio_state)) # Print results
GPIO.cleanup(var_gpio_in1) # Cleanup GPIO
print("")
print("Test Complete")