HTTPdynamic.c File Reference

Dynamic HTTP server example. 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 <Libs/NETlib/httplib.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>
#include ".\webpage\webpage.c"
#include ".\webpage\webpage.gen"

Functions
void	UpdateLedStates (void)
void	toggle_led (direntry_type *fp, unsigned int led_nr)
int32_t	http_interpreter (httpserv_type *http_server)
	User defined callback function. More...
int	main (void)

Variables
char *	program_name = "dynamic HTTP server"
direntry_type	led1 = {"led1" , "led1.gif" , sizeof(ledoff_gif) , FTP_RW | FTP_RAM, 'B', (uint32_t)ledoff_gif }
direntry_type	led2 = {"led2" , "led2.gif" , sizeof(ledoff_gif) , FTP_RW | FTP_RAM, 'B', (uint32_t)ledoff_gif }
direntry_type	led3 = {"led3" , "led3.gif" , sizeof(ledoff_gif) , FTP_RW | FTP_RAM, 'B', (uint32_t)ledoff_gif }
direntry_type	led4 = {"led4" , "led4.gif" , sizeof(ledoff_gif) , FTP_RW | FTP_RAM, 'B', (uint32_t)ledoff_gif }

Detailed Description

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

Author

D.SignT GmbH & Co. KG, Claus Hermbusche

Date

2019-06-03

This program installs a HTTP server (port 80) with either fix IP 192.168.168.200 (configurable in netconfig.c) or DHCP assigned address (e.g. 192.168.168.143, host name mydemo).

To verify this program, first 'ping' the DSP:

>ping 192.168.168.200

or, if configured for DHCP

>ping mydemo

If the settings and network connections are correct, the pings will be replied.

To see the web page type in your browser:

>http://192.168.168.200/index.htm

or, if configured for DHCP

>http://mydemo/index.htm

All pages and messages are hard-coded via c-variables into the code, but can also be loaded from internal flash.

Function Documentation

void UpdateLedStates

(

void

)

Examples:

HTTPdynamic.c.

{
    /***************************************************************************
     locals
    ***************************************************************************/
    uint16_t led_mask = 1, i;
    direntry_type *fp;
    uint16_t leds = LED_state();

    CPuts ("\r ");
    for ( i=0; i<4; i++ )
    {
        fp = user[0].dir[led1.index+i];

        if ( leds & led_mask )
        {
            /*******************************************************************
             change file to ledon.gif
            *******************************************************************/
            fp-> offset = (uint32_t)ledon_gif;
            fp-> size = sizeof(ledon_gif);
            fp-> max_offset = (uint32_t)ledon_gif + fp->size;
            CPuts (VT100_GREEN
                   " *     "
                   VT100_DEFAULT);
        }
        else
        {
            /*******************************************************************
             change file to ledoff.gif
            *******************************************************************/
            fp-> offset = (uint32_t)ledoff_gif;
            fp-> size = sizeof(ledoff_gif);
            fp-> max_offset = (uint32_t)ledoff_gif + fp-> size;
            CPuts (" o     ");
        }
        led_mask <<= 1;
    }
}

void toggle_led	(	direntry_type *	fp,
		unsigned int	led_nr
	)

Examples:

HTTPdynamic.c.

{
    /***************************************************************************
     locals
    ***************************************************************************/
    uint16_t led_mask = 1 << led_nr;
    uint16_t leds = LED_state();

    (void)fp;

    if ( leds & led_mask )
    {
        /***********************************************************************
         switch LED off
        ***********************************************************************/
        LED_off (led_nr);
    }
    else
    {
        /***********************************************************************
         switch LED on
        ***********************************************************************/
        LED_on (led_nr);
    }
}

int main

(

void

)

Examples:

HTTPdynamic.c.

{
    /***************************************************************************
     locals
    ***************************************************************************/
    int main_loop = 1;             /* main loop switch, set to 0 to exit      */
    volatile int32_t http_serv;

    /***************************************************************************
      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 0x10000 bytes required for this app
    /**************************************************************************/
    ASSERT_HEAP (initial_heap_size, 0x10000);
    // 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());

    /**************************************************************************/
     CPrintfProgress (" Initialize network ");
    /**************************************************************************/
    InitializeNetwork ( 64); // 64 bytes for ping

    /***************************************************************************
      initialize http server; parameter is the specified user list
    ***************************************************************************/
    http_serv = http_server_init ( user,  /* specified user list              */
                                   NULL,  /* mmc not supported                */
                                   HTTP_NO_LIMIT); /* max parallel connections */
                                          /* 0 == no limit (heap limit only)  */

    if ( http_serv == FALSE )
    {
        prg_exit ("http_server_init() failed"); /* possibly insufficient heap */
    }

    /***************************************************************************
     add some dynamic pages
    ***************************************************************************/
    http_add_page (&led1);
    http_add_page (&led2);
    http_add_page (&led3);
    http_add_page (&led4);

    /***************************************************************************
     define user callback function
    ***************************************************************************/
    http_define_callback ( http_interpreter);
    CPrintfProgressSuccess();

    /***************************************************************************
      main program loop: set main_loop to 0 to exit loop
    ***************************************************************************/
    while ( main_loop )
    {
        /***********************************************************************
         try to detect IP assignment
          if DHCP is used, the assigned IP address may change
        ***********************************************************************/
        if (monitor_ip_address (CPrintf))
        {
            /*******************************************************************
             print leds
            *******************************************************************/
            CPuts ("\r\n LED1   LED2   LED3   LED4");
            CPuts ("\r\n  o      o      o      o");
        }

        /***********************************************************************
          call net_isq() and http_server()
        ***********************************************************************/
        net_isq ();
        http_server ();

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

        /***********************************************************************
         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 = "dynamic HTTP server"

Examples:

HTTPdynamic.c.

direntry_type led1 = {"led1" , "led1.gif" , sizeof(ledoff_gif) , FTP_RW | FTP_RAM, 'B', (uint32_t)ledoff_gif }

Examples:

HTTPdynamic.c.

direntry_type led2 = {"led2" , "led2.gif" , sizeof(ledoff_gif) , FTP_RW | FTP_RAM, 'B', (uint32_t)ledoff_gif }

Examples:

HTTPdynamic.c.

direntry_type led3 = {"led3" , "led3.gif" , sizeof(ledoff_gif) , FTP_RW | FTP_RAM, 'B', (uint32_t)ledoff_gif }

Examples:

HTTPdynamic.c.

direntry_type led4 = {"led4" , "led4.gif" , sizeof(ledoff_gif) , FTP_RW | FTP_RAM, 'B', (uint32_t)ledoff_gif }

Examples:

HTTPdynamic.c.