Used in a passenger transport system LED screen

数模转换，控制pwm波形输出，51单片机，C语言。-Digital-analog conversion, control pwm waveform output, 51 single-chip, C language.

这是一个输出字节和汉字的程序...可以用的我已调试过的-output byte characters and procedures can be used to ... I have tuned in

基于51系列单片机的4×4矩阵式键盘识别.正在学习单片机-51 Series MCU-based 4 × 4 matrix keyboard identification. Are learning Singlechip

该文档包含了基于c8051f020的各种源码，包括AD、DA，串口，定时器，IIC以及时钟键盘等，很具有学习意义-This document contains a variety of source-based c8051f020, including AD, DA, serial port, timers, IIC and clock keyboard, it is with learning the meaning

单片机模拟器的几个例子，需要的朋友可以-A few examples of single-chip simulator, a friend in need can take a look at

单片机w77e58的中文资料，欢迎需要的同志下载-Singlechip W77E58 Chinese information, please download the need for comrades

调用汉字库显示汉字（点阵字库和曲线字库）-show characters (font and lattice curves font)

一个电子产品开发时的部分c代码D!绝对能用!-When an electronic product development part of c code D! Absolutely can!

本程序使用P89V51单片机利用起PCA功能对脉冲宽度可调，实现两路输出，加LED显示和按键功能，详细请看程序注释，编程风格自认可以-This procedure since the use of PCA use P89V51 Singlechip feature adjustable pulse width to achieve two-way output, plus LED display and button functions, see the detailed program notes, programming styles can themselves

单片机的编译工具 强烈推荐使用-SCM build tools strongly recommended!