mac.h

此文档为采用FPGA实现的以太网MAC层

#ifndef _MAC_H
#define _MAC_H

#include "sys.h"

typedef struct
{
    Uint8 destmac[6];
    Uint8 sourcemac[6];
    Uint16 type;
}
ETHHEADER;

#define ETH_SIZE sizeof(ETHHEADER)

typedef struct
{
    Uint16 hardware;
    Uint16 protocol;
    Uint8 hardwarelength;
    Uint8 protocollength;
    Uint16 operation;
    Uint8 senderhardware[6];
    Uint16 senderip_h;
    Uint16 senderip_l;
    Uint8 targethardware[6];
    Uint16 targetip_h;
    Uint16 targetip_l;
}
ARPFRAME;

#define ARP_SIZE sizeof(ARPFRAME)
#define ARP_OFFSET ETH_SIZE
//#define ARP_SIZE 28

typedef struct
{
    //Uint32 ip_address;
    Uint16 ip_address_h;
    Uint16 ip_address_l;
    Uint8 mac_address[6];
} IP_SETTINGS;

typedef struct
{
    Uint16 *packet_ptr;
    Uint16 len;
} LAYER_STRUCT;

typedef struct
{
    Uint16 packet_count;
    LAYER_STRUCT packets[10];
} PACKET_STRUCT;


#define ARP_TYPE 0x806
#define IP_TYPE 0x800

#define CMD_PING 1
#define CMD_SETA 2
#define CMD_READ 3
#define CMD_WRITE 4

#define EMAC_MAC_ADDR 0x5FA
#define EMAC_STATUS 0x5F9
#define EMAC_COMMAND 0x5F8
#define EMAC_LENL 0x5F7
#define EMAC_LENH 0x5F6
#define EMAC_IE 0x5F5
#define EMAC_BUF 0x0


#define EMAC_INT P1_4

void mac_init(void);

void mac_process(Uint8 bdindex);
void mac_send(Uint16 mac_index,Uint16 msgtypem,Uint16 len);


//Lower level MAC functions

void arp_handler(ARPFRAME *packet);

#endif