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Ashworth
Joined: 10 May 2006
Posts: 3
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| UDP won't Work |
 Posted: Wed May 10, 2006 2:38 am |
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I have recently purchased a CCS Embedded Ethernet Development board which has the ENC28J60 on it. Everything was working fine - TCP/IP, HTTP etc until I tried the UDP example. As this is the one I really needed I think I need some Help. I am not an expert C programmer so don't even know if my code is correct. I have removed as much of the Chiff chaff as possible to leave only the code I need. All it should do is to stream out a few bytes to the specified port The LCD display is updating correctly but nothing is actually being transmitted via UDP as far as I can tell.
| Code: |
#define STACK_USE_ICMP 1
#define STACK_USE_ARP 1
#define STACK_USE_UDP 1
#define MAX_SOCKETS 6//was 6
#define MAX_UDP_SOCKETS 4//was 4
#include "ccstcpip.h"
#if STACK_USE_CCS_PICENS
#include "drivers\mlcd.c"
#else
#include "drivers\dlcd.c"
#endif
#define UDP_SOURCE_PORT 61556
#define UDP_DESTINATION_PORT 61557
#define UDP_NUM_LISTEN_SOCKETS 2//was 2
UDP_SOCKET last_rx_socket=INVALID_UDP_SOCKET;
#define tx_socket UDPOpen(UDP_SOURCE_PORT, &UDPSocketInfo[last_rx_socket].remoteNode, UDP_DESTINATION_PORT)
void UDPTxTask(void)
{
// static int8 tx_socket;
int Counter;
char Char1;
Counter++;
Char1=Counter;
// tx_socket=UDPOpen(UDP_SOURCE_PORT, &UDPSocketInfo[last_rx_socket].remoteNode, UDP_DESTINATION_PORT);
if (UDPIsPutReady(tx_socket))
{
UDPPut("H");
UDPPut("E");
UDPPut("L");
UDPPut("L");
UDPPut("O");
UDPPut("\r");
UDPPut("\n");
UDPFlush();
// UDPClose(tx_socket);
printf(lcd_putc,"\fVolts :%u",Counter);
}
}
void main(void) {
MACAddrInit();
IPAddrInit();
init_user_io();
lcd_init();
printf(lcd_putc,"\fUDP Test");
delay_ms(2000);
StackInit();
while(TRUE)
{
StackTask();
UDPTxTask();
delay_ms(100);
}
}
:grin:
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Guest
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| Posted: Thu May 18, 2006 7:50 am |
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Hi ,
The problem is , when you use the CCS example , the fisrt things to do is to receive a packet . When the packet is received by the enc28j60 , the &UDPSocketInfo[last_rx_socket].remoteNode is update and the enc28j60 know the IP adress and the Mac adress
You must know the mac and ip adress. (wiht a arp request , see the TCP example )
Sorry , but my english is bad
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Ashworth
Joined: 10 May 2006
Posts: 3
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| How to Trasmit UDP Only then |
| Posted: Thu May 18, 2006 8:30 am |
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Thankyou for that information. It makes sense now.
Can you or anyone out there tell me how I just send out UDP packets to a specific port?
Being UDP, I didn't think that you need to know the destination IP only the port number?
I have been using Etherreal and I can see packets appearing, but for some reason its just not being picked up at the other end.
Thanks,
Rob |
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Alain
Joined: 18 Apr 2006
Posts: 3
Location: France
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| Posted: Thu May 18, 2006 3:22 pm |
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You can see here , one example using UDP.
This is a client , and it try to send string "R/103" to the server "Devicelink" (192.168.0.2). When i know the ip server address , i try to know the mac address of the server to initialised the NODE_INFO DeviceLink (the server)
This work fine 
| Code: | //IP address of the PC running DeviceLink.EXE
IP_ADDR server;
static NODE_INFO DeviceLink;
#define UDP_SOURCE_PORT 2500
#define UDP_DESTINATION_PORT 10000
#define UDP_NUM_LISTEN_SOCKETS 2
void UDPTxTask(void) {
static int8 button;
static TICKTYPE lastTick;
static int8 tx_socket;
static enum {UDP_TX_ARP_INIT=0,UDP_TX_ARP_REQ=1, UDP_TX_ARP_WAIT=2, UDP_TX_OPEN=3, UDP_TX_WAIT=4, UDP_TX_DEBOUNCE=5,
UDP_TX_ISREADY=6} state=0;
TICKTYPE currTick;
int8 dis;
currTick=TickGet();
switch (state) {
case UDP_TX_ARP_INIT:
memcpy(&DeviceLink.IPAddr, &server, sizeof(IP_ADDR));
printf(lcd_putc,"\nARP REQUEST ");
state=UDP_TX_ARP_REQ;
case UDP_TX_ARP_REQ:
if (ARPIsTxReady()) {
ARPResolve(&DeviceLink.IPAddr);
lastTick=currTick;
state=UDP_TX_ARP_WAIT;
}
break;
case UDP_TX_ARP_WAIT:
if (ARPIsResolved(&DeviceLink.IPAddr, &DeviceLink.MACAddr)) {
state=UDP_TX_WAIT;
printf(lcd_putc,"\n READY !! ");
}
else if (TickGetDiff(currTick, lastTick) > (TICKS_PER_SECOND * 2)) {
state=UDP_TX_ARP_REQ;
}
break;
case UDP_TX_WAIT:
if (BUTTON1_PRESSED()) {
state=UDP_TX_DEBOUNCE;
button=1;
}
break;
case UDP_TX_DEBOUNCE:
if (button==1 && !BUTTON1_PRESSED())
state=UDP_TX_OPEN;
break;
case UDP_TX_OPEN:
tx_socket=UDPOpen(UDP_SOURCE_PORT, &DeviceLink, UDP_DESTINATION_PORT);
if (tx_socket==INVALID_UDP_SOCKET)
{
printf("\r\nCan't open UDP socket for transmit");
state=UDP_TX_WAIT;
}
else
{
printf("\r\nStart Transmit UDP BUTTON%U", button);
state=UDP_TX_ISREADY;
}
break;
case UDP_TX_ISREADY:
if (UDPIsPutReady(tx_socket)) {
printf(UDPPut, "R/103");
UDPFlush();
UDPClose(tx_socket);
state=UDP_TX_WAIT;
printf(lcd_putc,"\n M/A moteur");
}
break;
}
}
void ServerAddrInit(void) {
//IP address of the PC running TCPSERVER.EXE
server.v[0]=192;
server.v[1]=168;
server.v[2]=0;
server.v[3]=2;
}
void main(void) {
MACAddrInit();
IPAddrInit();
init_user_io();
lcd_init();
printf(lcd_putc,"\f DEVICELINK\nPacific Fighter");
ServerAddrInit();
StackInit();
while(TRUE) {
StackTask();
UDPTxTask();
// UDPRxTask();
}
}
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Ashworth
Joined: 10 May 2006
Posts: 3
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| UDP Success |
| Posted: Wed Jun 07, 2006 4:08 am |
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Thanks,
Sorry for late reply, but that works excellent. I tihk the problem was just that I wasn't specifing a destination IP.
Don't know how their example could ever work.
Thanks,
Rob |
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Ricardo
Guest
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| Can you post all code for me?? |
| Posted: Fri Aug 04, 2006 4:54 pm |
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Something is wrong here.
Cannot connect to my enc28j60.
Can you send your example and all files dependences, i´m trying to make in my
Send to pozza@tropicalclube.com.br
Thanks
Sory bad english |
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thientaisodo
Joined: 31 Aug 2009
Posts: 5
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| Posted: Sat Aug 30, 2014 12:27 pm |
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| Alain wrote: | You can see here , one example using UDP.
This is a client , and it try to send string "R/103" to the server "Devicelink" (192.168.0.2). When i know the ip server address , i try to know the mac address of the server to initialised the NODE_INFO DeviceLink (the server)
This work fine
| Code: | //IP address of the PC running DeviceLink.EXE
IP_ADDR server;
static NODE_INFO DeviceLink;
#define UDP_SOURCE_PORT 2500
#define UDP_DESTINATION_PORT 10000
#define UDP_NUM_LISTEN_SOCKETS 2
void UDPTxTask(void) {
static int8 button;
static TICKTYPE lastTick;
static int8 tx_socket;
static enum {UDP_TX_ARP_INIT=0,UDP_TX_ARP_REQ=1, UDP_TX_ARP_WAIT=2, UDP_TX_OPEN=3, UDP_TX_WAIT=4, UDP_TX_DEBOUNCE=5,
UDP_TX_ISREADY=6} state=0;
TICKTYPE currTick;
int8 dis;
currTick=TickGet();
switch (state) {
case UDP_TX_ARP_INIT:
memcpy(&DeviceLink.IPAddr, &server, sizeof(IP_ADDR));
printf(lcd_putc,"\nARP REQUEST ");
state=UDP_TX_ARP_REQ;
case UDP_TX_ARP_REQ:
if (ARPIsTxReady()) {
ARPResolve(&DeviceLink.IPAddr);
lastTick=currTick;
state=UDP_TX_ARP_WAIT;
}
break;
case UDP_TX_ARP_WAIT:
if (ARPIsResolved(&DeviceLink.IPAddr, &DeviceLink.MACAddr)) {
state=UDP_TX_WAIT;
printf(lcd_putc,"\n READY !! ");
}
else if (TickGetDiff(currTick, lastTick) > (TICKS_PER_SECOND * 2)) {
state=UDP_TX_ARP_REQ;
}
break;
case UDP_TX_WAIT:
if (BUTTON1_PRESSED()) {
state=UDP_TX_DEBOUNCE;
button=1;
}
break;
case UDP_TX_DEBOUNCE:
if (button==1 && !BUTTON1_PRESSED())
state=UDP_TX_OPEN;
break;
case UDP_TX_OPEN:
tx_socket=UDPOpen(UDP_SOURCE_PORT, &DeviceLink, UDP_DESTINATION_PORT);
if (tx_socket==INVALID_UDP_SOCKET)
{
printf("\r\nCan't open UDP socket for transmit");
state=UDP_TX_WAIT;
}
else
{
printf("\r\nStart Transmit UDP BUTTON%U", button);
state=UDP_TX_ISREADY;
}
break;
case UDP_TX_ISREADY:
if (UDPIsPutReady(tx_socket)) {
printf(UDPPut, "R/103");
UDPFlush();
UDPClose(tx_socket);
state=UDP_TX_WAIT;
printf(lcd_putc,"\n M/A moteur");
}
break;
}
}
void ServerAddrInit(void) {
//IP address of the PC running TCPSERVER.EXE
server.v[0]=192;
server.v[1]=168;
server.v[2]=0;
server.v[3]=2;
}
void main(void) {
MACAddrInit();
IPAddrInit();
init_user_io();
lcd_init();
printf(lcd_putc,"\f DEVICELINK\nPacific Fighter");
ServerAddrInit();
StackInit();
while(TRUE) {
StackTask();
UDPTxTask();
// UDPRxTask();
}
}
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Hi @Alain !
Thanks for your UDPTxTask(), it's work very fine with me.
But i trouble with UDPRxTask(). It not work.
I'm using UDP_SOURCE_PORT 6666 and UDP_DESTINATION_PORT 6666 too for UDP transceive.
Please help me :(
| Code: | void UDPRxTask(void)
{
char c;
TICKTYPE currTick;
currTick=TickGet();
if (g_UDPRXSocket == INVALID_UDP_SOCKET)
{
g_UDPRXSocket = UDPOpen(UDP_SOURCE_PORT,NULL,INVALID_UDP_SOCKET);
}
else if (UDPIsGetReady(g_UDPRXSocket))
{
UDPGet(&c);
enable_print_ip=0;
printf(lcd_putchar,"UDP Received: %c ",c);
UDPDiscard();
}
} |
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