1.Servo
Description¶
UNIHIKER is equipped with a microcontroller responsible for controlling onboard components and GPIO. This project uses PinPong library of Python to control the ultrasonic sensor externally connected through side pins of the board.
Syntax¶
Object = Servo(Pin(Pin.P21)) Object.angle(angle)
Parameters¶
Pin.P21: Pin number 21. **angle: **Steering gear rotation angle.
Return¶
steering gear rotation angle
Example Description¶
In this example, UNIHIKER is first initialized with Board().begin(). At the same time, we use gui=GUI() to initialize the GUI. Then, we use s1 = Servo(Pin(Pin.P21)) to initialize the pin. We use txt=gui.draw_text() to display the content we want to display on the screen. In order to achieve virtual buttons on the screen, we defined four callback functions to control the output value of the servo rotation function. We use the botton_A = gui.add_button() method to set button properties. In order to maintain the long-term retention of the GUI interface, we have set a time delay function in the main function.
Hardware Required¶
Example Code¶
# -*- coding: utf-8 -*-
# Experimental effect: Servo control
# Wiring: Use a computer to connect a UNIHIKER main control board and P10 to connect a servo motor
import time
from pinpong.board import Board,Pin,Servo
from unihiker import GUI
import time
Board("UNIHIKER").begin() # Initialize, select board type, do not input board type for automatic recognition
gui=GUI()
s1 = Servo(Pin(Pin.P21)) # Input Pin into Servo to initialize servo pins, supporting P0 P2 P3 P8 P9 P10 P16 P21 P22 P23
def click_A(): # Define the action when clicking button A
s1.angle(10) # Control the servo to turn to the 0 degree position
print("10")
time.sleep(1)
def click_B(): # Define the action when clicking button B
s1.angle(90) # Control the servo to turn to the 90 degree position
print("90")
time.sleep(1)
def click_C(): # Define the action when clicking button C
s1.angle(170) # Control the servo to turn to the 170 degree position
print("170")
time.sleep(1)
def click_D(): # Define the action when clicking button C
for i in range(10, 171, 10):
s1.angle(i)
time.sleep(0.5)
for i in range(171, 10, -10):
s1.angle(i)
time.sleep(0.5) # Control the servo to turn to the 0-170 degree position
print("circulate")
time.sleep(1)
txt=gui.draw_text(text="servo",x=120,y=10,font_size=20,origin="center",color="#0000FF")
botton_A = gui.add_button(x=120, y=100, w=100, h=30, text="10°", origin='center', onclick=click_A)
botton_B = gui.add_button(x=120, y=150, w=100, h=30, text="90°", origin='center', onclick=click_B)
botton_C = gui.add_button(x=120, y=200, w=100, h=30, text="170°", origin='center', onclick=click_C)
botton_D = gui.add_button(x=120, y=250, w=100, h=30, text="circulate", origin='center', onclick=click_D)
while True:
time.sleep(1)
