Why choose SAMSUNG S3C44B0 for development-EEWORLD

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-ARM7TDMI (Thumb): This is the product with the most authorized users of the company. It combines the ARM7 instruction set with the Thumb extension to reduce memory capacity and system cost. At the same time, it also uses embedded ICE debugging technology to simplify system design and uses a DSP enhancement extension to improve performance. Typical uses of this product are digital cellular phones and hard disk drives.

--Thumb: Provides 32-bit RISC performance at the cost of a 16-bit system, with special attention paid to the very small memory capacity required

Embedded ICE debugging integrates CPU core debugging technology similar to ICE, so prototyping and system chip debugging are greatly simplified.

Why choose SAMSUNGS3C44B0 for development? At present, the trend of ARM7 chip development in China is Samsung's S3C44B0 and S3C4510. These two chips have different focuses: the former focuses on PDA applications, and the chip integrates LCD controller, SDRAM controller, 2 serial interface controllers, PWM controller, I2C controller, IIS controller, real-time clock, AD conversion and other abundant peripheral control modules; while S3C4510 is a CPU for specific network applications, lacking the abundant peripheral control modules of 44B0, but integrating a powerful network control module, which can support 100BASE network interface. For general users, especially beginners, S3C44B0 is undoubtedly the first choice, because the abundant peripheral interfaces make it possible for the system board to integrate various functions, and various network communication protocols can also be realized through the external network control chip.

linux is a simplified Linux for CPUs without MMU

"uCLinux is a project that complies with the GNU/GPL convention and is completely open source. The u in the English word stands for Micro, which means small, and the C stands for Control, which means control, so uCLinux is Micro-Control-Linux, which literally means "Linux system in the field of microcontrollers". It is specifically designed for CPUs without MMU, and has done a lot of miniaturization work for embedded systems. It already supports many of the CPUs mentioned above. The official homepage is www.uclinux.org
"SnapGear, Arcturus, Samsung support and maintain

Differences between Linux and uClinux

"uClinux supports non-MMU microprocessors
"uClinux does not implement fork() but vfork(). The parent process is locked until the child exec() or exit().
"Most of the source and binary code for the kernel has been rewritten to reduce the size as much as possible.
"uClinux is as small as possible compared to the regular Linux 2.0 kernel
"Stable, superb networking capabilities and excellent file system.

uClinux support

"Standard Linux API
" Full TCP/IP stack support
- Rich network, uClinux is an internet-ready OS, suitable for embeddedsystems.
"File system support -
NFS, ext2, MS-DOS, and FAT16/32 and a few other file systems

The bootloader is a part that must be designed in many embedded systems. For other developers, it is equivalent to the BIOS of a PC. It can shield some hardware information and improve the success rate of transplantation.

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