you may want to study arm, which is Samsung ARM7 44b0x in BSP, functions very powerful, source code is written by others, I do some of these procedures, a footnote to hope it may be useful.

Packet : 73462661基于44b0的bsp.rar filelist
基于44b0的BSP\inc\39vf160.h
基于44b0的BSP\inc\44B0X.H
基于44b0的BSP\inc\DataType.h
基于44b0的BSP\inc\MemCfg.s
基于44b0的BSP\inc\Option.s
基于44b0的BSP\inc\Rtl8019.h
基于44b0的BSP\inc\arp.h
基于44b0的BSP\inc\bios.h
基于44b0的BSP\inc\config.h
基于44b0的BSP\inc\console.h
基于44b0的BSP\inc\ctrl_set.h
基于44b0的BSP\inc\eth.h
基于44b0的BSP\inc\icmp.h
基于44b0的BSP\inc\ip.h
基于44b0的BSP\inc\mac.h
基于44b0的BSP\inc\skbuff.h
基于44b0的BSP\inc\tftp.h
基于44b0的BSP\inc\tftpput.h
基于44b0的BSP\inc\udp.h
基于44b0的BSP\inc\utils.h
基于44b0的BSP\inc
基于44b0的BSP\39VF160.C
基于44b0的BSP\44B0Sch.pdf
基于44b0的BSP\44BINIT.S
基于44b0的BSP\arp.c
基于44b0的BSP\bios44b0.mcp
基于44b0的BSP\bios.apj
基于44b0的BSP\console.c
基于44b0的BSP\ctrl_set.c
基于44b0的BSP\eth.c
基于44b0的BSP\icmp.c
基于44b0的BSP\ip.c
基于44b0的BSP\mac.c
基于44b0的BSP\main.c
基于44b0的BSP\MEMCFG.A
基于44b0的BSP\Option.a
基于44b0的BSP\skbuff.c
基于44b0的BSP\tftp.c
基于44b0的BSP\tftpmain.c
基于44b0的BSP\tftpput.c
基于44b0的BSP\udp.c
基于44b0的BSP\utils.c
基于44b0的BSP

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