SENA HD1200 - Manual (Page 47)

Starter Kit and User Manual for the HelloDevice 1200
44
}
//---------------------
// Process DPR Read
//---------------------
void DPR_Read()
{
unsigned char commandBuf[5], *ResponseBuf ;
int commandLen, lenReceived ;
int i, count, err ;
int clientLen ;
int offset, length, tmp ;
printf("\n\nEnter offset in hex (MAX. 0x7FF):") ;
scanf("%x", &offset) ;
printf("\nEnter length in digit (MAX. 1450):") ;
scanf("%d", &length) ;
// Initialize TCP socket
TCPSocketInit() ;
// Make TCP command
// 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 ;
// 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);
}
// Allocate buffer for incoming packet
ResponseBuf = calloc(length+4, sizeof(char)) ;
// Receive incomming packet....
lenReceived = recvfrom
(
sock,
ResponseBuf,