SENA HD1200 - Manual (Page 46)

Starter Kit and User Manual for the HelloDevice 1200
43
// Initialize length count
total_length=0;
// Start time measurement
start = clock();
// Loop of send/receive
for (j=0; j<loop; j++)
{
// Send command to the HelloDevice
err = sendto
(
sock,
&commandBuf,
commandLen,
0,
(struct sockaddr*)&clientAddr,
sizeof(clientAddr)
)
;
if (err == -1)
{
perror("\nsend
error\n");
exit (1);
}
// Response data = 4-byte address/length + data
ResponseBuf = (unsigned char *) calloc(length+4, sizeof(char)) ;
// Receive incomming packet....
lenReceived = recvfrom
(
sock,
ResponseBuf,
length+4,
0,
(struct sockaddr*)&clientAddr,
&clientLen
);
if (lenReceived < 0)
{
perror("\nError
receiving???\n") ;
exit(0) ;
}
// Accumulate Total data length received so far...
total_length += length + 4 ;
// Clear receive length
lenReceived = 0 ;
free(ResponseBuf)
;
// Print progress count
printf("%dth loop\r", j) ;
}
// Finish the time measurment
finish = clock();
// Measure elapsed time in second
duration = (double)(finish - start) / CLOCKS_PER_SEC;
// Print result
printf("\n\n\n%2.3f seconds elapsed for %d loops...\n", duration, loop);
bps = ((total_length*8.0)/duration)/1000.0 ; // total bytes * 8 bit/byte / duration sec /
1000 (Kbps)
printf("Total %.1f Kbytes transferred...\n", (double)total_length/1000.0) ;
printf("%.3f Kbps throughput measured...\n", bps) ;
// Close TCP socket
TCPSocketClose() ;