SunFounder Thales Kit, Руководство пользователя, Страница: 94 / 167

SunFounder Thales Kit for Raspberry Pi Pico, Release 1.0
(continued from previous page)
while True :
value = potentiometer . read_u16()
print (value)
led . duty_u16(value)
utime . sleep_ms( 200 )
What more?
Let’s use the potentiometer to swing the servo from left to right!
import machine
import utime
potentiometer = machine . ADC( 28 )
servo = machine . PWM(machine . Pin( 15 ))
servo . freq( 50 )
def interval_mapping (x, in_min, in_max, out_min, out_max):
return
(x - in_min)
*
(out_max - out_min) / (in_max - in_min) + out_min
def servo_write (pin,angle):
pulse_width = interval_mapping(angle, 0 , 180 , 0.5 , 2.5 )
duty = int (interval_mapping(pulse_width, 0 , 20 , 0 , 65535 ))
pin . duty_u16(duty)
while True :
value = potentiometer . read_u16()
angle = interval_mapping(value, 0 , 65535 , 0 , 180 )
servo_write(servo,angle)
utime . sleep_ms( 200 )
90 Chapter 3. For MicroPython User