实现多个数字滚动，移位显示，当按下某个按键时，会将对应于端口的数值送入低位数码管显示...

smart board 测试程序原代码-smart board the original test procedure code

4*4矩阵键盘（查表法） （C51环境）-4* 4 matrix keyboard (look-up table) (C51 environment)

USB开发D12的结构-USB D12 structure

9012红外解码c程序 9012_IR_jianma_program 把接收到的数据解码！-9012 infrared 9012_IR_jianma_program decoder c program to decode the received data!

带模式选择的LED显示，初学者练手必备 欢迎交流-Mode selection with the LED display, beginners welcome the exchange of the necessary training in hand

利用NRF9e5芯片编写的C51源代码，可实现点到点无线通信接收部分。-NRF9E5 chips prepared using C51 source code, can be achieved to receive part of point-to-point wireless communications.

Point RTOS 主要是一个针对小系统开发而设计的实时操作系统。 目前，Point RTOS 仅提供对51系列及其扩展系统单片机的支持， 针对51内核函数不能重入以及51单片机的内存空间管理方式等因素， RTOS放弃了抢先式内核的调度，而使用了时间片的调度方式，除非任务主动放弃， 否则任务将独占CPU一直运行，因而任务中必须完成对本次操作的时间片设置，即等时间的设置。-Main Point RTOS is a small system development and design of real-time operating system. At present, Point RTOS only provide for 51 series and its expansion of the system single-chip support for 51 core function should not re-entrant, as well as 51 single-chip memory space management and other factors, RTOS abandoned preemptive kernel scheduling, the use of a scheduling time slice manner, unless voluntarily chose to abandon the mission, or mission will be exclusive CPU has been running, which must be completed in the mission of this operation time slice settings, that is, the time settings.

52单片机的ucos移植程序，需要外加ram。比较通用。-52 Singlechip uCOS transplantation procedures, the need for additional ram. More generic.

AT89C51单片机的有关串行通信的源程序，并有仿真-AT89C51 microcontroller serial communication related to source, and there are simulation

通过测试已经可以应用 本程序的应用于C8051F020的I2C接口-Has passed the test can be applied to this procedure applies to the I2C interface C8051F020