This is an arbitrary remote control, according to a random keys, plus a digital...

一.显示年频率，周期，脉宽 三个功能二.在液晶显示器上显示上面三个功能的数值三.带掉电保护功能,掉电后，重新开机，显示先前对应参数测量值，按退出键，重新开始测量，否侧，先前存储到24C02里面的数据不更新电路描述：        一.芯片：AT89S52，液晶显示器LCD12684，脉冲信号发生器,示波器      二.行列式键盘键功能设置：           确认键:0x48（E)；    功能选择键：0x28（D);      返回键：0x88（F）

蜂鸣器在单片机上的应用,汇编语言,附原理图及说明学习文档 蜂鸣器的正极性的一端联接到5V电源上面，另一端联接到三极管的集电极，三极管的基级由单片机的P2.4管脚通过一个与非门来控制， 用户可以通过程序控制P2.4管脚的置低和置高来使蜂鸣器发出声音和关闭。 蜂鸣器的声音大小及音调可以通过调整P2.4管脚的置高时间及输出的波形进行控制，这一点可以在调试程序的时候来试验。-On the buzzer in single-chip applications, assembly language, with a schematic diagram and instructions to study documents the positive polarity of the end of the buzzer connected to the 5V power supply above, the other end connected to the transistor" s collector, the base level by the single-chip transistor Machine P2.4 pin through a NAND gate to control, the user can be programmed to set pin P2.4 low and set high to make the buzzer sound on and off. Buzzer sound size and pitch can be set by adjusting the P2.4 pin of the high time and output waveform control, and this point could be the time to test the debugger.

能够测量0hz~1Mhz范围内的各种频率，有自动换档功能-0hz ~ 1Mhz to measure the scope of the various frequencies, and features automatic transmission

To write assembly code to implement a circular First In First Out (FIFO) buffer in the data memory of PIC18F452 microcontroller, using the microcontroller’s direct addressing mode and indirect addressing mode. To expand on the FIFO assignment and implement the FIFO solution on the QWIKFLASH PIC target board and display the FIFOSTATUS as LED indicators. Recall: Flags within a file register called FIFOSTATUS: • Bit 0: FIFO_full • Bit 1: FIFO_empty • Bit 2: attempt_2_read when FIFO_empty • Bit 3: attempt_2_write when FIFO_full

用win32asm写的防火墙...基本的功能实现了，但是还有待改进-a program made by win32asm

tasm source document descript

设置关联文件的易源码-To set associated with the file easy to source ..............

汇编串操作的程序-compilation series operating procedures

test upload and LED

运用汇编实现简易的4位加减乘除计算器，通过硬件课程实践，证明代码的有效性，并且，在确认键值的方法上有更新的方法，值得参考借鉴。