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Altium教本I2C Arbitration 5A软件设计0224新

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I2C Arbitration 5A 软件设计
第一部分 原理图 1.1 PortSplitters.SchDoc
1.2PortSplitters.H
/*************************************************************************
**
** VERSION CONTROL: @(#)tcpip.h 1.3 03/10/31
**
** IN PACKAGE: Embedded TCPIP
**
** COPYRIGHT: Copyright (c) 2002 Altium
**
** DESCRIPTION: TCP, UDP, ICMP, IP related functions
**
**************************************************************************/
#ifndef _TCPIP_H_
#define _TCPIP_H_
#include "tcpipset.h"
#include "common/tcpip_global.h"
// transport layer exports the global buffer
#ifdef OPTION_ETHERNET
#include "common/ethernet.h"
#else
#include "common/serial.h"
#endif
//**************************************************************************
// supported IP version is only IP4 for now
#define IP_VERSION_IP4 4
// supported protocols on top of IP
#define IP_PROTOCOL_ICMP 1
#define IP_PROTOCOL_UDP 17
#define IP_PROTOCOL_TCP 6
// IP bitmask fragmentation flags
// (not supported, only used when debugging to check we don't get any...)
#define IP_FLAG_DF 0x4000
#define IP_FLAG_MF 0x8000
// ICMP type & codes for supported mesages
#define ICMP_TYPE_ECHOREPLY 0x00
#define ICMP_TYPE_UNREACH 0x03
#define ICMP_TYPE_ECHO 0x08
#define ICMP_CODE_UNREACH_PORT 0x03
// TCP option for receiving window size (only option we need)
#define TCP_RECVWIN_OPTION 2
#define TCP_RECVWIN_OPTION_LEN 4
#define TCP_DATA_MAXLEN (IP_MAXLEN - sizeof(IPHEADER) - sizeof(TCPHEADER)) //**************************************************************************
typedef struct
{
Uint8version;
Uint8service;
Uint16packetlength;
Uint16ident;
Uint16offset;
Uint8timetolive;
Uint8protocol;
Uint16checksum;
Uint32sourceip;
Uint32destip;
}
IPHEADER;
#define IPHEADER_LEN sizeof(IPHEADER)
#define IP ((IPHEADER*) IPBUF)
#define IPDATA ((char*) IPBUF + IPHEADER_LEN)
typedef struct
{
Uint8type;
Uint8code;
Uint16checksum;
Uint16ident;
Uint16sequence;
}
ICMPHEADER;
#define ICMPHEADER_LEN sizeof(ICMPHEADER)
#define ICMP ((ICMPHEADER*) (IPBUF + IPHEADER_LEN))
#define ICMPDATA ((char*) (IPBUF + IPHEADER_LEN + ICMPHEADER_LEN))
typedef struct
{
Uint16sourceport;
Uint16destport;
Uint32sequence;
Uint32acknowledge;
Uint8headerinfo;
Uint8flags;
Uint16window;
Uint16checksum;
Uint16urgent;
}
TCPHEADER;
#define TCPHEADER_LEN sizeof(TCPHEADER)
#define TCP ((TCPHEADER*) (IPBUF + IPHEADER_LEN))
#define TCPDATA ((char*) (IPBUF + IPHEADER_LEN + TCPHEADER_LEN))
typedef struct
{
Uint16sourceport;
Uint16destport;
Uint16length;
Uint16checksum;
}
UDPHEADER;
#define UDPHEADER_LEN sizeof(UDPHEADER)
#define UDP ((UDPHEADER*) (IPBUF + IPHEADER_LEN))
#define UDPDATA ((char*) (IPBUF + IPHEADER_LEN + UDPHEADER_LEN))
//**************************************************************************
extern void tcpip_init(void);
extern void tcp_resetall(void);
extern void tcp_timertick(void);
extern Uint8tcp_retries(void);
extern Uint16ip_process(void);
#ifdef OPTION_IP_ROUTING
extern Uint16 ip_routing(void);
#endif
extern char *ip_create(Uint32destip);
#ifdef OPTION_UDP
extern Uint16udp_sendprep(Uint16 ip_datalength);
extern void udp_create(Uint16sourceport, Uint16destport);
#endif
#ifdef DEBUG_TCP
extern void tcp_sessionstatus(void);
#endif
//************************************************************************** #endif。