SENA HD1200 User Manual

Page 45

Starter Kit and User Manual for the HelloDevice 1200

6.4 Sample Programs

6.4.1 Using the Socket Program for Communication

The following C program source code shows how to implement Internet socket interface program for the

HelloDevice communication. This sample code is implemented to read and to write Dual-Port RAM data, by

using Berkeley socket C API functions. This source is a part of the entire source code “the HelloDevice

installation folder\Src\C\dprdemo.c”. TestThroughput() function is for testing the maximal speed of the

communication in your network environment.

//---------------------
// Process Test Throughput
//---------------------
void TestThroughput()
{

unsigned char

commandBuf[5], *ResponseBuf ;

int

commandLen,

lenReceived

;

int

total_length=0

;

int

offset, length, tmp ;

double

bps=0

;

int err, loop ;

int

clientLen

;

clock_t start, finish;

double

duration;

// Enter loop count for this test...

printf("\nEnter loop count of this demo....\n>>") ;

// Read loop count

scanf("%d", &loop) ;

// Fix the size as 1450, which is max. of Ethernet packet size

// This is max. size of the DPRAM data that can be transferred in the HelloDevice

offset = 0 ;

length = 1450 ;

// Initialize TCP socket

TCPSocketInit()

;

// Make TCP command : 6-byte coce

// 1) Command ID

commandBuf[0] = DPRGet ;

// 2) DPRAM address

tmp = offset >> 8 ;

commandBuf[1] = tmp ;

tmp = offset & 0x00FF ;

commandBuf[2] = tmp ;

// 3) DPRAM length

tmp = length >> 8 ;

commandBuf[3] = tmp ;

tmp = length & 0x00FF ;

commandBuf[4] = tmp ;

// 4) Interrupt flag

commandBuf[5] = 0 ; // 0: Do not generate Interrupt to device, AA: Generate interrupt

commandLen = 6 ;