WIZnet 中文博客

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：

在下一节，我们将再次介绍一下UDP协议的简单实现。