基于飞思卡尔MC9S12XS128单片机的超声波控制程序，包含中断，主函数，定义，串口-Microcontroller based on Freescale MC9S12XS128 ultrasonic control program, including interrupts, the main function, definition, serial

51单片机，比较简单的红外传感器循迹小车程序，适合飞思卡尔比赛。-51 single-chip, a relatively simple infrared sensors tracking the car program for Freescale game.