W5100的简单TCP通讯协议的固件开发与更新

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下面是我对一个简单W5100的TCP协议固件的注释,

在此我们使用了W5100的开发板(W5100E01-ARV),开发和更新非常简单,AVR Studio的使用示意图放在最后。
这个程序实现了简单的socket建立,以太网收发数据的程序。
可以调用device terminal来进行测试。(在wiznet主页中可以搜索到这个小软件,可轻松实现串口和以太网的数据互通)
程序如下:

#include <stdio.h>

#include <stdlib.h>

#include <avr/io.h>

#include <avr/interrupt.h>

#include <string.h>

 

 

#include “../header/types.h”

#include “../header/serial.h”

#include “../header/socket.h”

#include “../header/w5100.h”

 

 

#define MAX_SIZE 2048

 

 

#define RX_BUF 0x1100

#define TX_BUF 0x1900

 

void main()

{

 

//initialize

 

cli(); // disable interrupt

EICRA=0x00;

EICRB=0x00;

EIMSK=0x00;

EIFR=0x00;

MCUCR = 0x80;// enable external ram

XMCRA=0x40; //define lower sector of memory for EXternal ram and upper sector for W5100C and others

sei();// enable interrupts

uart_init(0,7);

lcd_init();

 

 

//set IP address

 

uint8 addr[6];

 

iinchip_init();

sysinit(0x55,0x55); //

addr[0] = 192; addr[1] = 168; addr[2] = 1; addr[3] = 20;

setSIPR(addr);

addr[0] = 192; addr[1] = 168; addr[2] = 1; addr[3] = 1;

setGAR(addr);

addr[0] = 255; addr[1] = 255; addr[2] = 255; addr[3] = 0;

setSUBR(addr);

memcpy(addr, “\x00\x08\xDC\x00\x00\x00″,6);

setSHAR(addr);

 

uint8 lcd[50];

 

// IINCHIP_READ get register value from SIPR(Source IP register)

sprintf(lcd,”IP: %d.%d.%d.%d”,IINCHIP_READ(SIPR0),IINCHIP_READ(SIPR0+1),IINCHIP_READ(SIPR0+2),IINCHIP_READ(SIPR0+3));

lcd_puts(lcd);//print LCD string into LCD

 

uint8 len;

 

//Create socket 0 for TCP mode at port 5000

//#define Sn_MR_TCP 0x01

socket(0, Sn_MR_TCP, 5000, 0);

//extern uint8 socket(SOCKET s, uint8 protocol, uint16 port, uint8 flag);

 

 

//listen the socket 0

listen(0);

 

 

//check the status of Listen status (if entered), print to serial

if( getSn_SR(0) == SOCK_LISTEN)

{

printf(“Listen Mode”);

 

}

 

// if data is received

// extern uint16 getSn_RX_RSR(SOCKET s); // get socket RX recv buf size

while(getSn_RX_RSR(0) ==0 );

printf(“got data \r\n”);

 

//print data length

len = getSn_RX_RSR(0);

printf(“the size is %u \r\n”,len);

 

 

//set Send(TX) and Receive(RX) buffer pointer

uint8 * TX_BUFFER = (uint8 *) TX_BUF;

uint8 * RX_BUFFER =(uint8 *) RX_BUF;

 

if( len > MAX_SIZE)

len = MAX_SIZE;

 

 

//put the received data into RX buffer, save length to len

len = recv(0,RX_BUFFER,len);

 

//send data from RX Buffer to socket 0

send(0,RX_BUFFER,len);

}

 

使用AVR STUDIO编译,生成hex文件,然后烧录到MCU芯片中(Atmega128)

图片如下:

 

更多关于W5100的信息请参考

TCP/IP芯片

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