osd-contiki/cpu/avr/dev/rtl8019dev.c

78 lines
2 KiB
C

#include "net/uip.h"
#include "dev/rtl8019dev.h"
/*****************************************************************************
* Module Name: Realtek 8019AS Driver Interface for uIP-AVR Port
*
* Created By: Louis Beaudoin (www.embedded-creations.com)
*
* Original Release: September 21, 2002
*
* Module Description:
* Provides three functions to interface with the Realtek 8019AS driver
* These functions can be called directly from the main uIP control loop
* to send packets from uip_buf and uip_appbuf, and store incoming packets to
* uip_buf
*
* September 30, 2002 - Louis Beaudoin
* Modifications required to handle the packet receive function changes in
* rtl8019.c. There is no longer a need to poll for an empty buffer or
* an overflow.
* Added support for the Imagecraft Compiler
*
*****************************************************************************/
#define IP_TCP_HEADER_LENGTH 40
#define TOTAL_HEADER_LENGTH (IP_TCP_HEADER_LENGTH+ETHERNET_HEADER_LENGTH)
void RTL8019dev_init(void)
{
initRTL8019();
}
void RTL8019dev_send(void)
{
RTL8019beginPacketSend(uip_len);
// send packet, using data in uip_appdata if over the IP+TCP header size
if( uip_len <= TOTAL_HEADER_LENGTH ) {
RTL8019sendPacketData(uip_buf, uip_len);
} else {
uip_len -= TOTAL_HEADER_LENGTH;
RTL8019sendPacketData(uip_buf, TOTAL_HEADER_LENGTH);
RTL8019sendPacketData((unsigned char *)uip_appdata, uip_len);
}
RTL8019endPacketSend();
}
unsigned int RTL8019dev_poll(void)
{
unsigned int packetLength;
packetLength = RTL8019beginPacketRetreive();
// if there's no packet or an error - exit without ending the operation
if( !packetLength )
return 0;
// drop anything too big for the buffer
if( packetLength > UIP_BUFSIZE )
{
RTL8019endPacketRetreive();
return 0;
}
// copy the packet data into the uIP packet buffer
RTL8019retreivePacketData( uip_buf, packetLength );
RTL8019endPacketRetreive();
return packetLength;
}