Instruction Manual

HD132x Series User Manual
39
documentations on Microsoft socket programming. Characters in bold font indicate main functions of
the socket such as socket, connect and send.
//---------------------------------
// Process Serial data send
//---------------------------------
void SerialSend()
{
char commandBuf[512]="" ;
int commandLen ;
int err ;
// Re-Initialize TCP socket
TCPSocketInit() ;
// Read serial data
//: just ASCII string excluding control characters...
//: Max size is limited to 512 bytes in this demo....
printf("\nEnter the string you want to send to HelloDevice\n>>") ;
scanf("%s", commandBuf) ;
// Calc serial data length
commandLen = strlen(commandBuf) ;
// Send command to HelloDevice
err = sendto
(
sock,
&commandBuf,
commandLen,
0,
(struct sockaddr*)&serverAddr,
sizeof(serverAddr)
) ;
if (err == -1 )
{
perror("\nsend error\n");
exit (1);
}
}
//--------------------------------
// Initialize TCP socket
//--------------------------------
void TCPSocketInit()
{
char ipAddrStr[32] ;
int clientLen ;
int err ;
// Enter HelloDevice IP address
printf("Enter HelloDevice IP address(xxx.xxx.xxx.xxx) : ") ;
scanf("%s", ipAddrStr) ;
printf("\n\n") ;
// Convert IP address from string to long