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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...
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.
- 2023-01-15 10:50:03下载
- 积分:1
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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...
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
- 2022-12-18 04:30:03下载
- 积分:1
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2410 bios文件,基本功能的驱动及测试代码
2410 bios文件,基本功能的驱动及测试代码-2410 bios file, the basic functions of the driver and test code
- 2023-07-10 18:55:02下载
- 积分:1
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ZLG的SMARTARM2300的IAP_Program
ZLG的SMARTARM2300的IAP_Program-ZLG
- 2022-01-28 17:11:49下载
- 积分:1
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这是一款飞利浦公司的arm芯片的设计的原理图,可以学习到arm的设计特点。...
这是一款飞利浦公司的arm芯片的设计的原理图,可以学习到arm的设计特点。-This is a Philips arm of the chip design schematics, can learn to arm design features.
- 2022-01-23 10:23:33下载
- 积分:1
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STM32 源码
这是基于STM32 上交通灯模块的源码。展示了交通灯最基本的运作程序,使用的是野火的开发板。对初学者十分有用。看不懂的同学可以上野火的网站那有各种大神及详细视频。
- 2022-02-04 20:55:52下载
- 积分:1
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该程序为ARM实现的MEPG2解码器全套资料,包括boot文件.大家可以试着调一下!...
该程序为ARM实现的MEPG2解码器全套资料,包括boot文件.大家可以试着调一下!-procedures for the realization of the ARM intrigued decoder complete information, including documents boot. We can try to stress!
- 2022-09-19 06:45:03下载
- 积分:1
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周立功zlg_lpc213x一套完整的信息,这是一个I2C有限..
周立功ZLG_LPC213X的全套资料,这个是其中的I2C的代码-Week Ligong ZLG_LPC213X a complete set of information, this is one of the I2C code
- 2022-02-27 04:00:34下载
- 积分:1
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Project templates of IAR, including settings such as project description, as wel...
IAR工程模板初探,包含工程设置等常数的说明以及使用方法.可与Protues中的LPC系列ARM实现仿真(已测试).绝对原创.-Project templates of IAR, including settings such as project description, as well as constant use. Protues in with LPC series ARM achieve simulation (tested). Absolute originality.
- 2022-02-21 01:49:23下载
- 积分:1
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spi driver
spi总线驱动,在8bit mcu上调试通过。
spi总线控制方便,效率很高。
- 2022-03-07 09:05:53下载
- 积分:1