Import of the contiki-2.x development code from the SICS internal CVS server

cpu/avr/dev/rtl8019dev.c

@@ -0,0 +1,77 @@
+#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;
+}