最新的TMS320LF2407A开发板原理图，protel格式

ARM 嵌入式系统 LPC 22xx I2C1主机实验－读写CAT1025-ARM embedded system host LPC 22xx I2C1 experiment- to read and write CAT1025

包括仿真电路及C程序，参考《PIC单片机入门和实战》。按键检测原理：PORTB的高4位设置为输入模式，且开启内部若上拉功能，这样，PORTB的高4位就全都是1，也就是按键的列线全是1，而PORTB的低4位全是0，也就是按键的行线全是0。若有按键按下，那么行线和列线就会连通，按键所在的列线的电压就会拉低，变为0。这个时候，读PORTB，低4位仍然为0 ，但是高四位就会有一位也是0。所以if((PORTB & 0xF0)!=0xF0)可以判断按键是否按下，因为如果按下了，高四位就不全为1。按键扫描，低4位依次输出0，而 低4位的另外3位输出1，那么，当输出0的行线，碰到按键按下的列线，就会将列线的电压拉低，这时候，读PORTB，就会得到按键的行列位置，即按键码。如果输出0的行线，未与按键的列线相连，那么高4位仍然全为1。就继续扫描。KeyCode[]数组中，存储了最近几次的按键码，最多可以存储最近8次，更改数组就可以更改存储大小。若多连接几个数码管，就可以依次显示按键的内容，如同计算器一样

在S3C2410上实现RS485通信，包含源代码工程-S3C2410 realize in the RS485 communications, including the source code works

arm vhdl rtl code,can synthesis

ARM基础知识,我刚找到的。 和大家共同分享下-ARM basic knowledge, I have just found. And the U.S. share of

lcd color bar example. platform bf537 + lcd card.-lcd color bar example. Bf537 platform lcd c ard.

Samsung s S3C4510B 16/32-bit RISC microcontroller is a cost-effective, high-performance microcontroller solution for Ethernet-based systems. An integrated Ethernet controller, the S3C4510B, is designed for use in managed communication hubs and routers.-s Samsung S3C4510B 16/32-bit RISC microco ntroller is a cost-effective, high-performance microcontroller solution f or Ethernet-based systems. An integrated Ethe campus controller, the S3C4510B. is designed for use in managed communication hu bs and routers.

这是看操作系统一书的一点笔记，希望对初学者有点帮助-This is the operating system look a little note book, I hope a little help for beginners

采用MAX485 芯片 使用ARM 系统硬件的UART 编程实现RS485 通信的基本收发功能-Using MAX485 chip systems using ARM hardware UART Programming RS485 communication function of the basic transceiver

ARM 指令集:超强功能的ARM指令集,不下会后悔哦,可不要看他是个指令集.真的很强诶!-ARM instruction set: Superacid of ARM instruction set features no less than will regret it Oh, do not look at him is an instruction set. Really strong ah!