Chat.c

Chat.c example details
UDP details

/***************************************************************************//**
@file chat.c
@brief UDP chat program
@verbatim
_ _ _
__| | ___(_) ____ _ __ | |_
/ _` | / __| |/ _` | '_ \| __|
| (_| | _ \__ \ | (_| | | | | |_
\__,_|(_) ___/_|\__, |_| |_|\__|
Signalprocessing |___/ Technology
@endverbatim
@author D.SignT GmbH & Co. KG, Claus Hermbusche
@date 2019-06-03
@anchor CHATEX
@cond Software License Agreement
Copyright (C) 2001-2019 D.SignT GmbH & Co. KG - http://www.dsignt.de
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the
distribution.
Neither the name of D.SignT GmbH & Co. KG nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
Disclaimer
THIS SOFTWARE IS PROVIDED BY D.SIGNT GMBH & CO. KG "AS IS" AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL D.SIGNT GMBH & CO. KG BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
@endcond
*******************************************************************************/
/*******************************************************************************
include stdtypes.h to avoid data type mismatch
*******************************************************************************/
#include <BoardSupport/inc/stdtypes.h>
/*******************************************************************************
include Runtime Source
*******************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <inttypes.h>
#include <time.h>
#include <string.h>
/*******************************************************************************
network support functions
*******************************************************************************/
#include <Libs/NETlib/net.h> /* D.Module network support */
/*******************************************************************************
board specific functions
*******************************************************************************/
#include <BoardSupport/inc/BoardSpecific.h> /* board support functions */
/*******************************************************************************
common support functions
*******************************************************************************/
#include <Common/Common.h> /* on exit function */
#include <Common/uartio.h> /* UART support */
#include <Common/timer.h> /* timer setting */
#include <Common/CPrintf.h> /* CPrintf defines */
/*******************************************************************************
network configuration
*******************************************************************************/
#include <BoardSupport/config/netconfig.c> /* network configuration */
#ifdef __cplusplus
extern "C" {
#endif /* !__cplusplus */
/*******************************************************************************
local prototypes
*******************************************************************************/
#ifdef __cplusplus
} // extern "C"
#endif
/*******************************************************************************
* *
* DEFINES *
* *
*******************************************************************************/
/*******************************************************************************
* *
* GLOBALS *
* *
*******************************************************************************/
/*******************************************************************************
program name
*******************************************************************************/
char *program_name = "chat";
char *udp_data; /* data buffer */
SOCKET *udp_tx; /* socket descriptor 1 for transmit */
SOCKET *udp_rx; /* socket descriptor 2 for receive */
/*******************************************************************************
* *
* FUNCTIONS *
* *
*******************************************************************************/
/*******************************************************************************
@brief Main application
@param -
@return never
*******************************************************************************/
#pragma CODE_SECTION(main , ".commontext");
int main ( void )
{
/***************************************************************************
locals
***************************************************************************/
int main_loop = 1; /* main loop switch, set to 0 to exit */
timeval stamp1, stamp2, delta; /* used to determine startup time */
int32_t len; /* received data length */
/***************************************************************************
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();
/***************************************************************************
malloc space for data
***************************************************************************/
CPrintfProgress (" Try to allocate data buffer ");
udp_data = (char *) malloc (UDP_MAX_PACKET_SIZE * sizeof(char));
if ( udp_data == NULL )
{
prg_exit ("out of memory error");
}
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());
/***************************************************************************
measure network initialization time
***************************************************************************/
stamp1 = GetTimeStamp();
/**************************************************************************/
CPrintfProgress (" Initialize network ");
/**************************************************************************/
InitializeNetwork ( 64); // 64 bytes for ping
/**************************************************************************
open sockets:
**************************************************************************/
udp_tx = socket_open (ANY_ADDRESS,
5061,
5031,
DATATYPE_CHAR,
UDP_INIT_FUNC);
if ( udp_tx == INVALID_SOCKET )
{
prg_exit ("socket_open() error"); /* possibly insufficient heap */
} // if
udp_rx = socket_open (ANY_ADDRESS,
5062,
5032,
DATATYPE_CHAR,
UDP_INIT_FUNC);
if ( udp_rx == INVALID_SOCKET )
{
prg_exit ("socket_open() error"); /* possibly insufficient heap */
} // if
/***************************************************************************
set receive buffer
***************************************************************************/
set_recv_buffer (udp_rx, udp_data, UDP_MAX_PACKET_SIZE);
CPrintfProgressSuccess();
stamp2 = GetTimeStamp();
tv_interval (&delta, &stamp1, &stamp2);
CPuts (" network startup time [sec]: ");
CPrintf (VT100_RED
"%"PRId32".%03"PRId32"\r\n"
VT100_DEFAULT,
delta.tv_sec,
delta.tv_usec/1000);
/***************************************************************************
main program loop: set main_loop to 0 to exit loop
***************************************************************************/
CPuts ("\r\n Entering main loop ...");
while ( main_loop )
{
/***********************************************************************
process net_isq()
***********************************************************************/
net_isq ();
/***********************************************************************
monitor link status
***********************************************************************/
monitor_link_status (CPrintf);
/***********************************************************************
try to detect IP assignment
if DHCP is used, the assigned IP address may change
***********************************************************************/
monitor_ip_address (CPrintf);
if ( net_recv (udp_rx, udp_data, UDP_MAX_PACKET_SIZE) )
{
// len = net_recv_event_handler (udp_rx, CPrintf); /* with messages */
len = net_recv_event_handler (udp_rx, NULL); /* without messages */
if (len)
{
/***************************************************************
udp_tx is configured for "ANY_ADDRESS", that means, the
destination address is unknown. If you want to send the
received message on udp_rx back to sender, you have to
copy the destination address information from udp_rx to udp_tx:
***************************************************************/
udp_tx-> dest_addr = udp_rx-> dest_addr;
/***************************************************************
send message back to sender
***************************************************************/
net_send_safe (udp_tx, udp_data, len, 0);
}
}
/***********************************************************************
show that the program is running, perform symbol animation
***********************************************************************/
CPrintAnimatedSymbol ( sym_animate, 200000, ANIMATE_SYMBOLS_COUNT);
}
/***************************************************************************
exit program, shut down peripherals
***************************************************************************/
return (0);
}