DHCPtest.c File Reference

Receiving DSP IP-address from DHCP-server. More...

#include <BoardSupport/inc/stdtypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <inttypes.h>
#include <time.h>
#include <string.h>
#include <Libs/NETlib/net.h>
#include <BoardSupport/inc/BoardSpecific.h>
#include <Common/Common.h>
#include <Common/uartio.h>
#include <Common/timer.h>
#include <Common/CPrintf.h>
#include <BoardSupport/config/netconfig.c>

Macros
#define	USE_DHCP   1
#define	MAX_PING_DATA   100

Functions
int	main (void)

Variables
char *	program_name = "DHCP"
far char *	host_name
far char *	domain_name

Detailed Description

                          _         _             _
                       __| |    ___(_) ____ _ __ | |_
                      / _` |   / __| |/ _` | '_ \| __|
                     | (_| | _ \__ \ | (_| | | | | |_
                      \__,_|(_) ___/_|\__, |_| |_|\__|
                     Signalprocessing |___/ Technology

Author

D.SignT GmbH & Co. KG, Claus Hermbusche

Date

2019-06-04

The terminal-window should print on success:

 DSP IP-address before initializing: 0.0.0.0

 Link status changed: Linked at 100Mbit full duplex
 assigned DSP IP-address:192.168.168.123
 success

 DHCP demo running on address 192.168.168.123

 MAC address: 02-00-c1-31-00-34
 IP address:  192.168.168.123
 Host name:   mydemo
 Domain name: dsignt.net
 DNS Server:  192.168.168.1
 Gateway:     192.168.168.1
 Subnetmask:  255.255.255.0
 now ping the dsp:
>ping 192.168.168.123    or
>ping mydemo

The real assigned IP address depends on your DHCP configuration. If the DSP hangs for a while after the first line, your DHCP configuration may be wrong or no DHCP-server is reachable. In this case after about 20-30 seconds (and a few retries) a link-local address is assigned and a warning should appear on the screen:

 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 !!! warning: no DHCP server available           !!!
 !!! assigned IP address is a link-local address !!!
 !!! make sure your host is in the same local    !!!
 !!! subnet: 169.254.x.x                         !!!
 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Macro Definition Documentation

#define USE_DHCP   1

#define MAX_PING_DATA   100

Function Documentation

int main

(

void

)

{
    /***************************************************************************
     locals
    ***************************************************************************/
    int main_loop = 1;             /* main loop switch, set to 0 to exit      */
    uint32_t ip;
    char buffer[20];               /* small buffer for ip-address conversion  */

    /***************************************************************************
      initialize application (e.g. timer clocks, PLL settings, EMIF etc.)
       (ref. \Common\Common.c)
    ***************************************************************************/
    AppInit (GET_CLOCK);

    /***************************************************************************
      select output device for CPrintf  (ref. \Common\cprintf.c)
      possible settings:
        CPRINTF_UART_OUTPUT                       -> output to UART
        CPRINTF_CCS_OUTPUT                        -> output to CCS
        CPRINTF_UART_OUTPUT | CPRINTF_CCS_OUTPUT  -> output to UART and CCS
    ***************************************************************************/
    CPrintf_select_output (CPRINTF_DEFAULT_OUTPUT);  /* default outputs       */

    /***************************************************************************
     print a start up message
    ***************************************************************************/
    START_UP_MESSAGE (BLANK_REV NETLIB_REV);

    /**************************************************************************/
    // CPrintfProgress (" Heap check ");
    // at least 0x2000 bytes required for this app
    /**************************************************************************/
    ASSERT_HEAP (initial_heap_size, 0x2000);
    // CPrintfProgressSuccess();

    /**************************************************************************/
     CPrintfProgress (" Setup system time ");
     // 1 milli seconds resolution
    /**************************************************************************/
    SetupSystemTime ( SYSTEM_TIMER_INT, SYSTEM_TIMER, RES_MSECONDS);
    CPrintfProgressSuccess();
    CPrintf ("   *** timer %d mapped to CPU int %d ***\r\n",
             SystemTimerDev, SYSTEM_TIMER_INT);

    /**************************************************************************/
     CPrintfProgress (" Enable interrupts ");
    /**************************************************************************/
    BoardEnableInterrupts();
    CPrintfProgressSuccess();

    /**************************************************************************/
     CPrintfProgress (" Start system timer ");
    /**************************************************************************/
    StartSystemTimer ();
    CPrintfProgressSuccess();
    CPrintf ("   *** timer %d running at %"PRId32" Hz ***\r\n", SystemTimerDev, RES_SECONDS/GetSystemTimerRes());

    /***************************************************************************
     print DSP IP address before initializing sockets:
    ***************************************************************************/
    ip = get_ip_address (0);
    CPrintf ("\r\n DSP IP-address before initializing: %s\r\n", inet_ntoa (ip, buffer));

    /***************************************************************************
     initialize network
    ***************************************************************************/
    CPrintfProgress (" Initialize network ");

    /***************************************************************************
     The default network configuration for all examples are configured in file
     \BoardSupport\netconfig.c. eth.ip contains either a fixed local IP address
     string or a host name depending on switch USE_DHCP. Fill the eth.ip array
     with a string starting with a letter to force InitializeNetwork() to use
     DHCP. InitializeNetwork() appends the lower MAC address to form a unique
     network name
    ***************************************************************************/
    strcpy (eth.ip, "mydemo");          /* host name                          */

    InitializeNetwork ( 64);
    CPrintfProgressSuccess();

    CPrintf (" Largest free heap block : %"PRIu32" bytes\r\n", GetFreeHeapSize ());

    /***************************************************************************
      main program loop: set main_loop to 0 to exit loop
    ***************************************************************************/
    CPrintf ("\r\n Entering main loop ...");
    while ( main_loop )
    {
        /***********************************************************************
         process net_isq()
        ***********************************************************************/
        net_isq ();  // process ISQ

        /***********************************************************************
         monitor link status
        ***********************************************************************/
        monitor_link_status (CPrintf);

        /***********************************************************************
         try to detect IP assignment
          if DHCP is used, the assigned IP address may change
        ***********************************************************************/
        if (monitor_ip_address (CPrintf))
        {
            ip = get_ip_address (0);
            CPrintf (" now ping the dsp:\r\n>ping %s", inet_ntoa (ip, buffer));
            if (!IS_LINKLOCAL(ip))
            {
                CPrintf ("    or\r\n>ping %s", host_name);
                if (*domain_name)
                {
                    CPrintf (".%s", domain_name);
                }
            }
            CPuts (CRLF);
        }

        /***********************************************************************
         show that the program is running, perform symbol animation
        ***********************************************************************/
        CPrintAnimatedSymbol ( sym_animate, 200000, ANIMATE_SYMBOLS_COUNT);
    }

    /***************************************************************************
      exit program, shut down peripherals
    ***************************************************************************/
    return (0);
}

Variable Documentation

char* program_name = "DHCP"

far char* host_name

Examples:

DHCPTest.c.

far char* domain_name

Examples:

Blocksend.c, DHCPTest.c, and Echo.c.