转换数字模拟

FreeRTOS操作系统,所有代码采用C语言编写,支持8bit,16bit,32bit的处理器.学习嵌入式操作系统的最佳选择！-FreeRTOS operating systems, all code using C language support 8bit, 16bit, 32bit processor. Embedded operating system to study the best choice!

hffmancode队列的插入删除处理 -insert delete hffmancode queue handle

spi接口协议的点整液晶128*64点阵驱动实现-spi interface protocol point of the entire 128* 64 dot matrix LCD driver to achieve

四路寻迹传感器有信号(白线）为0  没有信号（黑线）为1四路寻迹传感器电源+5V GND 取自于单片机板靠近液晶调节对比度的电源输出接口关于单片机电源：本店驱动模块内带LDO稳压芯片，当电池输入最低的电压6V时候可以输出稳定的5V分别在针脚标+5 与GND 。这个电源可以作为单片机系统的供电电源。

Application thermometer for atmega128 on IAR, real work.

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arm的ethernet_328网口驱动程序，已经经过调试了，可以直接移植。-ethernet_328 based arm of the network driver I have read debugging, it can direct transplantation.

24c02的读写实验，Keil工程，希望对处学者有所帮助-24C02 experimental reading and writing, Keil works Department would like to help scholars

读连接在44b0 PG口PG4 位的ds18b20的64位ROM码。-Reading 44b0 PG connected to the place I PG4 ds18b20 ROM of 64 yards.

keypad interfacing arm