TC35GSM模块操作C51子程序，项目用的，少加修改就可以应用于开发和学习！...

电子秒表的设计 1、用系统8253定时器提供的55ms定时单位，设计秒表定时程序。 2、有关系统定时方法： PC机系统中的8253定时器0工作于方式3，外部提供一个时钟作为CLK信号, 频率：f=1.1931816MHz。 定时器0输出方波的频率:fout=1.1931816/65536=18.2Hz。 输出方波的周期Tout=1/18.2=54.945ms。8253A每隔55ms引起一次中断-Electronic stopwatch design one, using the system timer 8253 provides 55ms timing units, design stopwatch timing procedures. 2, the system timing method: PC system timer 0 of 8253 working in the way of 3, to provide an external clock as the CLK signal, the frequency: f = 1.1931816MHz. Timer 0 output square wave frequency: fout = 1.1931816/65536 = 18.2Hz. Cycle square wave output Tout = 1/18.2 = 54.945ms. 8253A every 55ms caused a disruption

基于SHT71数字温湿度传感器的采集实现，89c51-SHT71 digital temperature and humidity sensors based on the collection of achieving, 89c51

U disk and Mp3 Driver Program

频率计 等精度频率计 可以用于频率测试的等精度频率计 可用的-Such as precision frequency meter frequency meter can be used for the frequency of tests, such as precision frequency meter available

单片机CPU时序-SCM CPU timing

用ATMEL AVR单片机开发的MMC程式在SPI模式-with ATMEL AVR development programs in the MMC SPI mode

12864LCD电子钟c语言程序，电子钟的经典之作-12864LCD electronic bell c language program, the electronic bell classic

IO口模拟串口发送，可用于双串口，可被其他程序调用 void rs2_send_byte(uchar cByte) 向串口发送一个字节-Send serial port analog IO, can be used for dual-serial port, other procedures can be called void rs2_send_byte (uchar cByte) sends a byte to the serial port

基于keil c51的rtos tiny源代码（keil 7.05 version）-based on the Byelorussian tiny decoder source code (c51 7.05 version)

基于AT89C51的数字时钟，6位LED显示。