Keyestudio Smart Little Turtle Robot V3 Manual page 183

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digitalWrite(right_ctrl,LOW);
analogWrite(right_pwm,200);
}
void car_right()//car turns right
{
digitalWrite(left_ctrl,LOW);
analogWrite(left_pwm,200);
digitalWrite(right_ctrl,HIGH);
analogWrite(right_pwm,200);
}
void car_Stop()//stop
{
analogWrite(left_pwm,0);
analogWrite(right_pwm,0);
}
//this function is used for dot matrix display
void matrix_display(unsigned char matrix_value[])
{
for(int i=0; i<8; i++)
{
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