arm7 lpc2132 GPIO driver for beep

蜂鸣器响 改变蜂鸣器的频率，通过改变延时时间 蜂鸣器的时间要是是靠延时来完成的-Buzzer buzzer ring to change the frequency by changing the delay time if the buzzer is the time to be completed by the time delay

usbio的上位机动态连接文件，Ver 2.41-PC usbio the dynamic link file, Ver 2.41

利用HD66421实现灰度字符显示，keilC51编译环境-HD66421 realize the use of gray-scale character show, keilC51 compiler environment

51单片机_RTOS方式控制GSM模块TC35I源程序. 希望对大家有用。-_RTOS Control of 51 single-chip GSM module TC35i source. Hope useful for everyone.

C8051F040 t3可调频率方波输出例程-C8051F040 adjustable frequency square-wave output routines

在STC5410AD单片机硬件基础上实现的串行接口的液晶显示源程序。-The STC5410AD MCU based on the hardware, a serial interface, LCD display source.

INA128/INA129精密低功耗仪表放大器的详细中文资料及经典电路例子-INA128/INA129 precision low-power instrumentation amplifier中文detailed information and examples of the classic circuit

上位机是VB设置成的界面；下位机是用C编释的51单片机的温度采集模块。-VB PC are set to the interface under the C-bit machines are used for release of 51 single-chip temperature acquisition module.

ok very good os

波形发生器的源程序，能产生方波、三角波、和矩形波三种波形-The source waveform generator, which can produce square, triangle wave, and rectangular-wave three kinds of waveforms