IAR prepared to use, MSP430 button switch control with LED, invaluable learning...

at91rm9200的2.6.24的内核补丁-AT91RM9200 the 2.6.24 kernel patch

前言想了很久,要不要写这篇文章?最后觉得对操作系统感兴趣的人还是很多,写吧.我不一定能造出玉,但我可以抛出砖.包括我在内的很多人都对51使用操作系统呈悲观态度,因为51的片上资源太少.但对于很多要求不高的系统来说,使用操作系统可以使代码变得更直观,易于维护,所以在51上仍有操作系统的生存机会.流行的uCos,Tiny51等,其实都不适合在2051这样的片子上用,占资源较多,唯有自已动手,以不变应万变,才能让51也有操作系统可用.这篇贴子的目的,是教会大家如何现场写一个OS,而不是给大家提供一个OS版本.提供的所有代码,也都是示例代码,所以不要因为它没什么功能就说LAJI之类的话.如果把功能写全了,一来估计你也不想看了,二来也失去灵活性没有价值了.下面的贴一个示例出来,可以清楚的看到,OS本身只有不到10行源代码,编译后的目标代码60字节,任务切换消耗为20个机器周期.相比之下,KEIL内嵌的TINY51目标代码为800字节,切换消耗100~700周期.唯一不足之处是,每个任务要占用掉十几字节的堆栈,所以任务数不能太多,用在128B内存的51里有点难度,但对于52来说问题不大.这套代码在36M主频的STC12C4052上实测,切换任务仅需2uS.

给ucgui用的字库HZK12,12x12点阵的汉字库和hzk16点阵的汉字库，还有UCGUI自带的全部汉字库。--HZK12, 12*12, Chinese characters library, and HZK16 Chinese characters library for UCGUI. It also has all Chinese characters included in UCGUI.

使用STM32f407移植FATFS文件系统，最新版本R0.10。底层采用SDIO四线驱动，DMA传输数据，速度可以达到1M/s。需要注意的是，发送和接收的数据缓冲区的地址需要是四字节对齐的，也就是说它的起始地址需要是4的倍数，否则会出现读写错误的现象。

英文点阵字库,嵌入式系统必备--English font lattice library.

单片机驱动步进电机程序设计.含电路图，设计思路，汇编程序。-MCU to drive a stepper motor programming. Including schematic, design ideas, assembler.

The program was written with some object-orientation in mind, which means that all functions that operate on a certain structure, has the structure s name as prefix in the function name, for example "Bitstream_get" which gets bits from a bitstream structure. -The program was written with some object-o rientation in mind, which means that all functions that operate on a certain structure, has the structure"s name as prefix in the functio n name, for example "Bitstream_get" which gets bits fr om a fade structure.

AT89C51单片机控制LCD12864液晶显示器显示汉字；-AT89C51 single-chip LCD display LCD12864 control characters

MiniGUI1.6.9的窗口编程实例，学习MiniGUI的好资料-Window MiniGUI1.6.9 programming examples, learning good information MiniGUI

凌阳unsp，61实验箱自检程序。代码比较全-Sunplus unsp, 61 self-test procedure experimental boxes. Comparison of the entire code