89C52单片机的底层代码,包括A/D,D/A转换,键盘,LED显示等

51单片机驱动LCD的子程序，LCD为定制的液晶，采用HT1621作为LCD驱动芯片-Single-chip LCD driver 51 of the subroutine, LCD for customized liquid crystal, used as the LCD driver IC HT1621

51单片机程序，ASM版，前一个是C版，请多提意见-51 SCM program, ASM version is the C version of the previous, please speak up

基于MSC51的数字钟。采用PCF8563作为日历芯片，ZLG7290显示和键盘控制。具有5个闹钟源。同时可以修改报时时间和报时音效和LED灯效。-MSC51-based digital clock. PCF8563 chip used as a calendar, ZLG7290 display and keyboard control. Clock source has a 5. At the same time, time can be amended time and time efficient audio and LED lamps.

SY0406开发板的测试程序 可以检查键盘使用 密码保护 LED显示-SY0406 development board testing procedures to check the use of password-protected keyboard LED Display

实验名称：看门狗实验 功能描述：使能系统看门狗。 如果将PA0连接到LED上观察到实验现象为LED灯闪烁。 如果连接到SPK上将会听到SPK间歇性鸣叫。 如果将watchdog_init() 注释掉或者将WDT_off() 前面的注释去掉则将看门狗禁止 此时连接到LED上观察到的现象为LED常亮 实验目的：熟悉看门狗的操作 实验说明：MCU--M16 外部7.3728M晶振 -AVR for Watchdog!

gp32是模托罗拉比较早的一款片子，资源较少但比较容易学习，是初学者不错的选择。-Die Torola gp32 is a comparison of the early films, but with fewer resources to more easily study is a good choice for beginners.

单片机控制的双路有源滤波器设计。有用的朋友请下载-Single-chip dual-controlled active filter design. Friend please download useful

proteus例子,一些简单的proteus应用,对于初学者很实用-Proteus example, Proteus some simple applications, very useful for beginners

很强大，很完整的，在单片机控制LED显示屏上玩俄罗斯方块-Very powerful, very complete, in SCM control LED display on the play Tetris ~ ~ ~ ~

单片机与PC键盘的程序-MCU and the procedures PC keyboard