ARM7

ami8563 clock source code

这是一个不到2000行的操作系统，巧妙地利用ARM9 CPU的内存管理单元(MMU)实现进程的切换。ARM9的4G虚拟地址可分成128个进程空间，每个32M。虽然它们的虚拟地址(VA)都是0-(32M-1)，但是对应的MVA(Modified vitual address,由虚拟地址VA和进程号PID组合而来)不一样，设置MVA对应的页表指向不同物理地址就可以很方便地让各进程运行空间相互隔开。代码很少，注释丰富，希望能对想理解操作系统、了解ARM体系结构的朋友有所帮助。 -This is a trip of less than 2000 operating system, cleverly using ARM9 CPU memory management unit (MMU) to achieve the switching process. ARM9 4G virtual address can be divided into 128 process space, each 32M. While their virtual address (VA) are 0- (32M-1), but the corresponding MVA (Modified Virtual address, and by the virtual address VA and the process of portfolio from PID) not the same, set MVA corresponding page table at the different physical address can be very easy to let the the process of separating the mutual operation of space. Code rarely Notes rich, in hopes of understanding the operating system, understanding the ARM architecture friends help.

基于三星44b0的flash程序，包括基本操作-Samsung 44b0 of the flash-based procedures, including basic operation

三星S3C2440 LED控制器驱动程序-Samsung S3C2440 LED controller driver

lpc2148 uc/gui的移植例程，keil编译环境-lpc2148 uc/gui transplant routines, keil compiler environment

ARM 编程16位整片擦除-ARM programming 16 entire erasure

STM32编译开发环境及仿真调试篇-野马学习笔记1-STM32 compiler development environment and simulation debugging chapter- Broncos Study Notes 1

莫尔斯编解码源程序，实现莫尔斯编解码传输-Morse, source codecs, codec realize Morse transmission

深圳优龙LPC22xx开发板bios源码仅供参考-Shenzhen, Liuzhou LPC22xx excellent development board bios source for reference only

以lpc2119芯片为核心，通过AD端口读取电压值，经双CAN将值传送至CAN-USB转换器后传至上位机-To lpc2119 chip as the core, the port reads the voltage value through the AD, after the value of dual-CAN will be sent to the CAN-USB converter spread after the host computer