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changing ip of TM4C1294 and rebooting ethernet

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Hi all!

I started a tcp server on my TM4C1294. At the beginning, my code works. Then I get new ip, dns, gateway and subnet mask from serial port. 

I want to restart my server with the new ip,dns,gw and subnet values. For this reason, I tried the below code...

Unfortunately, the program stuck in "Ethernet.begin". 

Is there anything in order to restart the ethernet and tcp server with new ip?


//LIBRARIES
#include <stdint.h>
#include <stdbool.h>
//#include "inc/hw_memmap.h"
//#include "driverlib/debug.h"
#include <Ethernet.h>
#include <Wire.h>
//#include "driverlib/pin_map.h"
//#include "driverlib/gpio.h"
//#include "driverlib/sysctl.h"
//#include "driverlib/i2c.h"
//#include "inc/hw_i2c.h"
//#include "inc/hw_types.h"
////#include "XIO.h"
//#include "string.h"



byte mac[] = { 0x00, 0x1A, 0xB6, 0x02, 0xF0, 0x80 };

int PortNumber = 1213;
byte ip_arr[]  = { 77, 99, 0, 66 }; 
byte dns_arr[]  = { 77, 99, 1, 1 }; 
byte gw_arr[]  = { 77, 99, 1, 1 }; 
byte mask_arr[]  = { 255, 0, 0, 0 }; 
EthernetServer server = EthernetServer(PortNumber);



void setup() {
  Serial.begin(19200);
  /*ip = ip_arr;
  dns = dns_arr;
  gw = gw_arr;
  mask = mask_arr;*/
  Ethernet.begin(mac, ip_arr, dns_arr, gw_arr, mask_arr);
  server.begin();
  delay(100);

}

int serial_read_data[25];
int serial_index = 0;
void get_serial_data(String serial_data)
{
  unsigned char  incomingByte;
  char *sr_data = &serial_data[0];
  char str[40];
  //char *tab2 = new char [serial_data.length()+1];
  byte ip1 = 0;
  byte ip2 = 0;
  byte ip3 = 0;
  byte ip4 = 0;

  if(serial_data == "ver" )
  {
    Serial.println("\nVer: 1.01");
  }
  else if(serial_data == "show" )
  {
    Serial.print("IP = ");
    Serial.println(Ethernet.localIP());
    Serial.print("Subnet = ");
    Serial.println(Ethernet.subnetMask());
    Serial.print("Gateway = ");
    Serial.println(Ethernet.gatewayIP());
    Serial.print("Port = ");
    Serial.println(PortNumber, DEC); 
  }
  else if(serial_data == "U" )
  {
    //Ethernet.stop();
    Serial.println("\nserver rebooting-1");
    server.available().stop();
    Serial.println("\nserver rebooting-2");
    delay(100);
    //try this!!!!
    
    SysCtlReset();
    delay(100);
    
    Ethernet.begin(mac, ip_arr, dns_arr, gw_arr, mask_arr);//STUCKS HERE!!!!!!!!!
 
    delay(100);
    Serial.println("\nserver rebooting-3");
    server.begin();
    Serial.println("\n server rebooted...");
    Serial.print("IP = ");
    Serial.println(Ethernet.localIP());
    Serial.print("Subnet = ");
    Serial.println(Ethernet.subnetMask());
    Serial.print("Gateway = ");
    Serial.println(Ethernet.gatewayIP());
    Serial.print("Port = ");
    Serial.println(PortNumber, DEC); 
  }
  else
  {
    //char serial_data[serial_data.length()];
    //strcpy (tab2, serial_data.c_str());
    memset(str, '\0', sizeof(str));
    strncpy ( str, sr_data, 3);
    if(strcmp(str, "IP=") == 0)
    {
      Serial.println("\nIP Changing!!");
      ip1 = 100 * (sr_data[3] - 0x30) + 10 * (sr_data[4] - 0x30) + (sr_data[5] - 0x30);
      ip2 = 100 * (sr_data[7] - 0x30) + 10 * (sr_data[8] - 0x30) + (sr_data[9] - 0x30);
      ip3 = 100 * (sr_data[11] - 0x30) + 10 * (sr_data[12] - 0x30) + (sr_data[13] - 0x30);
      ip4 = 100 * (sr_data[15] - 0x30) + 10 * (sr_data[16] - 0x30) + (sr_data[17] - 0x30);
      Serial.println(ip1, DEC);
      Serial.println(ip2, DEC);
      Serial.println(ip3, DEC);
      Serial.println(ip4, DEC);
      ip_arr[0] = ip1;
      ip_arr[1] = ip2;
      ip_arr[2] = ip3;
      ip_arr[3] = ip4;
    }
    else if(strcmp(str, "SN=") == 0)
    {
      Serial.println("\nSubnet Changing!");
      ip1 = 100 * (sr_data[3] - 0x30) + 10 * (sr_data[4] - 0x30) + (sr_data[5] - 0x30);
      ip2 = 100 * (sr_data[7] - 0x30) + 10 * (sr_data[8] - 0x30) + (sr_data[9] - 0x30);
      ip3 = 100 * (sr_data[11] - 0x30) + 10 * (sr_data[12] - 0x30) + (sr_data[13] - 0x30);
      ip4 = 100 * (sr_data[15] - 0x30) + 10 * (sr_data[16] - 0x30) + (sr_data[17] - 0x30);
      Serial.println(ip1, DEC);
      Serial.println(ip2, DEC);
      Serial.println(ip3, DEC);
      Serial.println(ip4, DEC);
      mask_arr[0] = ip1;
      mask_arr[1] = ip2;
      mask_arr[2] = ip3;
      mask_arr[3] = ip4;
    }
    else if(strcmp(str, "GW=") == 0)
    {
      Serial.println("\nGW Changing!!");
      ip1 = 100 * (sr_data[3] - 0x30) + 10 * (sr_data[4] - 0x30) + (sr_data[5] - 0x30);
      ip2 = 100 * (sr_data[7] - 0x30) + 10 * (sr_data[8] - 0x30) + (sr_data[9] - 0x30);
      ip3 = 100 * (sr_data[11] - 0x30) + 10 * (sr_data[12] - 0x30) + (sr_data[13] - 0x30);
      ip4 = 100 * (sr_data[15] - 0x30) + 10 * (sr_data[16] - 0x30) + (sr_data[17] - 0x30);
      Serial.println(ip1, DEC);
      Serial.println(ip2, DEC);
      Serial.println(ip3, DEC);
      Serial.println(ip4, DEC);
      gw_arr[0] = ip1;
      gw_arr[1] = ip2;
      gw_arr[2] = ip3;
      gw_arr[3] = ip4;
    }
    else
    {
      strncpy ( str, sr_data, 5);
      if(strcmp(str, "Port=") == 0)
      {
        Serial.println("\nPort Changing!!");
        PortNumber = 10000 * (sr_data[5] - 0x30) + 1000 * (sr_data[6] - 0x30) 
                      + 100 * (sr_data[7] - 0x30) + 10 * (sr_data[8] - 0x30)
                      + (sr_data[9] - 0x30);
        Serial.println(PortNumber, DEC);
      }
    }
  }
}

//int i=0;
void loop() {


   /*   Serial.println("\nI2C SEND");  
    delay(100);
    uint32_t pui32DataTx[3];

    I2CMasterSlaveAddrSet(I2C0_BASE, 0x20, false);
      Serial.println("\nMASTER SLAVE ADdRES SET"); 
     delay(100); 
    pui32DataTx[0] = 0x80 | 0x08;
    pui32DataTx[1] = 0x01;
      int i;
    for(i = 0; i < 2; i++){
      
      
      I2CMasterDataPut(I2C0_BASE, pui32DataTx[i]);
      Serial.println("\ncount: "); 
      Serial.println(i);
      I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_SINGLE_SEND);
      delay(100); 
      while(I2CMasterBusBusy(I2C0_BASE)); //Loop until the bus is no longer busy
      Serial.println("\neheheef: "); 
      Serial.println(i);
    }*/

        if (Serial.available() > 0) {
                // read the incoming byte:
              String incomingByte = Serial.readString();

                // say what you got:
                get_serial_data(incomingByte);
        }
}

 

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I was needed to do exactly same thing in my recent project and i lost so much time trying to fix this. I'll help you so you don't have to live through same thing : )

 

First = > You should remove all the lines after "SysCtlReset" line. Because after that line it'll jump to Setup() function and pause there. You should press "continue debugging" button to continue. If you are not debugging, it'll jump to setup() function and continue from there.

 

You can ask me if you have any other question.

 

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