SunFounder PiCar-4WD - Page 68

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keyboard_control.py
In the code, we use readchar and readkey to get the input state of the key, then we assign some functions
to the keys by using if statement.
import picar_4wd as fc
import sys
import tty
import termios
import asyncio
power_val = 50
key = 'status'
def readchar():
……
def readkey(getchar_fn=None):
getchar = getchar_fn or readchar
……
def Keyborad_control():
while True:
global power_val
key=readkey()
if key=='6':
……
elif key=='4':
……
if key=='w':
……
elif key=='a':