8 4 Implement the above design on the top of uC/OS II University of Electronic Science Technology of China(UESTC) Interfaces for ultrasonic MCF_GPIO_PORTDD&=~Trig /produce a 20us pulse >TestTimeSum=Gettime[1]-Gettime[0]//Calculate the distance Interfaces for PWM OSSpeeddown O OSSpeedup ( OSTurnLeft ( OSTurnRight ( ■Interfaces for LCD LCDWcmd ( /Determine the position on the LCD LCDWdata ( /Display the given information LCDShowChar ()/Display the detected distance Real-Time Systems Lab8 Real-Time Systems Lab University of Electronic Science & Technology of China (UESTC) 4 Implement the above design on the top of uC/OSⅡ  MCF_GPIO_PORTDD&=~Trig // produce a 20us pulse  TestTimeSum=Gettime[1]-Gettime[0] //Calculate the distance  Interfaces for ultrasonic  OSSpeeddown ()  OSSpeedup ()  OSTurnLeft ()  OSTurnRight ()  Interfaces for PWM  LCDWcmd () // Determine the position on the LCD  LCDWdata () // Display the given information  LCDShowChar () // Display the detected distance  Interfaces for LCD