EK-TM4C1294XL: changing ip of TM4C1294 and rebooting ethernet

Can you tell me where your example code came from so that I can direct your question to the correct person?

Hi Bob,

I coded the code myself.

I'm sorry, my question was unclear. Are you using Energia? If not, where did the "server.begin()" function come from?

Hi Bob,
Sorry for the inconvenience. I'm using energia.
I first initialize ethernet server with a default ip, gateway, subnet in setup.
From serial port, it gets new IP, new GW and subnet values. After getting new values for IP, GW, subnet and dns, I am trying to restart ethernet connection with new values.

Thanks for your time!

Here is my entire code:

//*************************************************************************************
//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 = 1234;
byte ip_arr[] = { 162, 98, 0, 06 };
byte dns_arr[] = { 162, 98, 1, 1 };
byte gw_arr[] = { 162, 98, 1, 1 };
byte mask_arr[] = { 255, 0, 0, 0 };
EthernetServer server = EthernetServer(PortNumber);

// IO EXPANDER PCA9698 Class define U1 to U7 chips
XIO tempU[7] ;//{U1, U2, U3, U4, U5, U6, U7};

int IOselect [5] [8] { //initialize to zero
{0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07},
{0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17},
{0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27},
{0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37},
{0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47},
};


void setup() {
Serial.begin(19200);
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 == "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" )
{

Serial.println("\nserver rebooting-1");
server.available().stop();
Serial.println("\nserver rebooting-2");
delay(100);

Ethernet.begin(mac, ip_arr, dns_arr, gw_arr, mask_arr);//STUCKS!!!!!!!!



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() {

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


get_serial_data(incomingByte);
}
}