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keil C51 H－Test事例-H-Test case

单片机,嵌入式系统实时操作系统rtos及基于80C51单片机源码 -Single chip, embedded systems and real-time operating system rtos source based on 80C51 microcontroller

带闹钟功能，可以调整闹钟和时间。文件含有protel 做的原理图和PCB文件-With alarm function, you can adjust the alarm and time. Does the document contain Protel schematic and PCB documents

EEPROM 24c04其根本是，先往24C02中写数据，然后，读出数据，在数码管中显示，这样直观明了，详细说明，请看程序中注解-EEPROM 24c04 其根本是，先往24C02中写数据，然后，读出数据，在数码管中显示，这样直观明了，详细说明，请看程序中注解

arm7 bootloader source, very good-arm7 Bootloader source, very good

利用L293D驱动步进电机，正转，反转，调速等-Make use of stepper motor driver L293D is transferred, reverse, speed control, etc.

单片机串行口的编程使用包括一些具体的设置-chuangxinkou

基于51系列单片机的超声波测距壁障程序 采用4位共阴数码管显示-51 Series single-chip microcomputer-based ultrasonic ranging barrier procedure used a total of four digital tube display Yam

ZLG7290B 是广州周立功单片机发展有限公司自行设计的数码管显示驱动及键盘扫描 管理芯片。能够直接驱动8 位共阴式数码管（或64 只独立的LED），同时还可以扫描管理 多达64 只按键。其中有8 只按键还可以作为功能键使用，就像电脑键盘上的Ctrl、Shift、 Alt 键一样。另外ZLG7290B 内部还设置有连击计数器，能够使某键按下后不松手而连续有 效。采用I2C 总线方式，与微控制器的接口仅需两根信号线。该芯片为工业级芯片，抗干扰 能力强，在工业测控中已有大量应用。-Canton weeks ZLG7290B is Ligong Singlechip Development Co., Ltd. to design the digital tube display driver and the keyboard scan management chip. Can directly drive a total of 8 vaginal digital tube (or 64 independent LED), at the same time management can also scan up to 64 keys. Which has 8 buttons can also be used as function keys, like the computer keyboard on the Ctrl, Shift, Alt keys like. Another internal ZLG7290B batter has also set up counters, can press a button and a row after不松手effective. Using I2C bus mode microcontroller interface with only two signal lines. The chip-on-chip for industry, anti-interference ability, in the industrial measurement and control has been a large number of applications.

这里给出74hc595的c51驱动程序。带锁存功能的串入并出芯片。-Here are 74hc595 the C51 driver. With latch function and a string into the chip.