lwipmoveHUAHUA.docVIP

Lwip是一个非常优秀的开源协议栈，本人成功地把它移植到两款ARM7芯片上，移植过程中使用了众多大虾的成果，在此感谢他们的无私奉献！俗话说滴水之恩当涌泉相报，我反CS8900A的驱动程序张贴出来，希望对大家有利用价值。??? 网上有不少CS8900A的驱动程序，但大多是使之工作于Memory模式，Memory模式占用较多的地址口，适用于有EMI接口的芯片，而对于没有EMI接口的芯片（在低端嵌入式应用场合比较常见），IO模式因占用较少的地址线而得到广泛的应用。本驱动程序工作于16位IO模式，并在Lwip1.1.1上能够很好地工作，底层操作系统采用uCOS-II。/** @file:cs8900if0.c * * Ethernet network driver for CS8900A */ /* * * This is a device driver for the Crystal Semiconductor CS8900 * chip in combination with the lwIP stack. * * The Swedish Institute of Computer Science and Adam Dunkels * are specifically granted permission to redistribute this * source code under any conditions they seem fit. * * A quick function roadmap: * * cs8900a0_*() are low level, cs8900a hardware specific functions. * These are declared static in the device driver source and * SHOULD NOT need to be called from outside this source. * * cs8900if0_*() are the lwIP network interface functions. * * cs8900if0_rxIsr() is an early interrupt service routine (ISR). * It merely post a semaphore to indicate the cs8900 needs servicing. * * cs8900if0_rxThread() is the actual interrupt event service routine. * It must be called whenever the cs8900 signal a interrupt semaphore. * It MAY be polled safely (so, you do NOT NEED interrupt support.) * 把所有的接收工作都放在这个函数中是为了尽量使ISR简捷。 * * cs8900a0_init() sets up the cs8900, using its register set. When * using the driver on your particular hardware platform, make sure * the register setups match. * Function is called from cs8900if_init(). * * cs8900a0_input() transfers a received packet from the chip. * Function is called from cs8900if_input(). * * cs8900a0_output() transfers a packet to the chip for transmission. * Function is called from cs8900if_output(). * * cs8900if0_init() initializes the lwIP network interface, and * calls cs8900_init() to initialize the hardware. * Function is called from lwIP. * * cs8900if0_input() calls cs8900_input() to get a received packet * and then forwards t