nes-proj/backyard/platform/c64/net/tfe-drv.c

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/*
* Copyright (c) 2001-2004, Adam Dunkels.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: tfe-drv.c,v 1.1 2007/05/23 23:11:30 oliverschmidt Exp $
*
*/
#include "contiki-net.h"
#include "cs8900a.h"
static u8_t output(void);
static const struct uip_eth_addr addr =
{{0x00,0x00,0x00,0x64,0x64,0x64}};
SERVICE(tfe_drv_service, packet_service, { output };);
PROCESS(tfe_drv_process, "TFE driver");
/*---------------------------------------------------------------------------*/
static u8_t
output(void)
{
uip_arp_out();
cs8900a_send();
return 0;
}
/*---------------------------------------------------------------------------*/
static void
pollhandler(void)
{
#define BUF ((struct uip_eth_hdr *)&uip_buf[0])
/* Poll Ethernet device to see if there is a frame avaliable. */
uip_len = cs8900a_poll();
if(uip_len > 0) {
/* A frame was avaliable (and is now read into the uip_buf), so
we process it. */
if(BUF->type == HTONS(UIP_ETHTYPE_IP)) {
uip_arp_ipin();
uip_len -= sizeof(struct uip_eth_hdr);
tcpip_input();
} else if(BUF->type == HTONS(UIP_ETHTYPE_ARP)) {
uip_arp_arpin();
/* If the above function invocation resulted in data that
should be sent out on the network, the global variable
uip_len is set to a value > 0. */
if(uip_len > 0) {
cs8900a_send();
}
}
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(tfe_drv_process, ev, data)
{
PROCESS_POLLHANDLER(pollhandler());
PROCESS_BEGIN();
uip_setethaddr(addr);
cs8900a_init();
SERVICE_REGISTER(tfe_drv_service);
process_poll(&tfe_drv_process);
while(1) {
PROCESS_YIELD();
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/