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noname3020
Joined: 16 Jun 2013
Posts: 2
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| Problem with tcp/ip stack |
 Posted: Fri Jun 21, 2013 8:52 pm |
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Hi,
I'm using the tcp/ip stack with example 13b.c
I'm using pic18f4520 to send data from rs232 to to the TCP_client.exe. But i don't know why my board only send data for about 30s then it did not continue sending. i could still ping to my board but the TCP_client.exe didn't receive anything.
When I pressed disconnect and then pressed connect again in the application TCP_client.exe, or when I reset my board, the data was started sending. But after about 30s, my problem happen again.
| Code: | void MyTCPTask() {
static TICKTYPE lastTick[NUM_LISTEN_SOCKETS];
static TCP_SOCKET socket[NUM_LISTEN_SOCKETS]={INVALID_SOCKET};
static enum {
MYTCP_STATE_NEW=0, MYTCP_STATE_LISTENING=1,
MYTCP_STATE_CONNECTED=2, MYTCP_STATE_DISCONNECT=3,
MYTCP_STATE_FORCE_DISCONNECT=4
} state[NUM_LISTEN_SOCKETS]={0};
static NODE_INFO remote[NUM_LISTEN_SOCKETS];
TICKTYPE currTick;
char c;
int8 i;
currTick=TickGet();
for (i=0;i<NUM_LISTEN_SOCKETS;i++) {
switch (state[i]) {
case MYTCP_STATE_NEW:
socket[i]=TCPListen(EXAMPLE_TCP_PORT);
if (socket[i]!=INVALID_SOCKET) {
state[i]=MYTCP_STATE_LISTENING;
//sprintf(&lcd_str[i][0],"LISTENING");
}
else {
//sprintf(&lcd_str[i][0],"SOCKET ERROR");
}
break;
case MYTCP_STATE_LISTENING:
if (TCPIsConnected(socket[i])) {
state[i]=MYTCP_STATE_CONNECTED;
//sprintf(&lcd_str[i][0],"CONNECTED!");
lastTick[i]=currTick;
}
break;
case MYTCP_STATE_CONNECTED:
if (TCPIsConnected(socket[i])) {
if (TickGetDiff(currTick,lastTick[i]) > ((int16)TICKS_PER_SECOND * 300)) {
state[i]=MYTCP_STATE_DISCONNECT;
//sprintf(&lcd_str[i][0],"TIMEOUT");
lastTick[i]=currTick;
}
else {
if (TCPIsGetReady(socket)) {
while (TCPGet(socket, &c)){
//lcd_str[which][i++]=c;
//if (i>=20) {i=19;}
//lcd_str[which][i]=0;
}
}
for (j=0;j<40;j++) if (TCPIsPutReady(socket[i])) TCPPut(socket[i],data_u[j]);
TCPFlush(socket[i]);
}
}
else {
//sprintf(&lcd_str[i][0],"DISCONNECTED");
state[i]=MYTCP_STATE_FORCE_DISCONNECT;
}
break;
case MYTCP_STATE_DISCONNECT:
if (TCPIsPutReady(socket[i])) {
state[i]=MYTCP_STATE_FORCE_DISCONNECT;
}
else if (TickGetDiff(currTick, lastTick[i]) > (TICKS_PER_SECOND * 10)) {
state[i]=MYTCP_STATE_FORCE_DISCONNECT;
}
break;
case MYTCP_STATE_FORCE_DISCONNECT:
TCPDisconnect(socket[i]);
state[i]=MYTCP_STATE_LISTENING;
break;
}
}
} |
| Code: | void main(void) {
enable_interrupts(GLOBAL);
enable_interrupts(INT_RDA);
enable_interrupts(INT_EXT);
enable_interrupts(INT_EXT1);
enable_interrupts(INT_EXT2);
MACAddrInit();
IPAddrInit();
StackInit();
while(TRUE) {
StackTask();
MyTCPTask();
}
} |
Please help me,
Thanks, |
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oxo
Joined: 13 Nov 2012
Posts: 219
Location: France
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| Posted: Sat Jun 22, 2013 2:48 am |
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Looks like your DHCP lease is expiring.
You need to call DHCPTask() regularly. |
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noname3020
Joined: 16 Jun 2013
Posts: 2
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| Posted: Sun Jun 23, 2013 3:45 am |
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The original example has defined not to use DHCP. It only used ICMP, ARP and TCP. And it set the default IP address.
| Code: | #define STACK_USE_ICMP 1
#define STACK_USE_ARP 1
#define STACK_USE_TCP 1
//------------------------------------------------
void IPAddrInit(void) {
//IP address of this unit
MY_IP_BYTE1=192;
MY_IP_BYTE2=168;
MY_IP_BYTE3=1;
MY_IP_BYTE4=50;
//network gateway
MY_GATE_BYTE1=192;
MY_GATE_BYTE2=168;
MY_GATE_BYTE3=1;
MY_GATE_BYTE4=1;
//subnet mask
MY_MASK_BYTE1=255;
MY_MASK_BYTE2=255;
MY_MASK_BYTE3=255;
MY_MASK_BYTE4=0;
} |
I saw at the function "TCPPut" in the "tcp.c" that the "RemoteWindow" decrease to 0 over time. When it reach 0, the function "TCPPut" won't put anything to transmit. But i didn't see anywhere increase or update the "RemoteWindow". Did i omit somewhere and is that the ploblem?
| Code: | BOOL TCPPut(TCP_SOCKET s, BYTE byte)
{
SOCKET_INFO* ps;
WORD tempCount;
ps = &TCB[s];
// Make sure that the remote node is able to accept our data
if(ps->RemoteWindow == 0)
return FALSE;
if(ps->TxBuffer == INVALID_BUFFER)
{
ps->TxBuffer = MACGetTxBuffer(FALSE);
// Check to make sure that we received a TX Buffer
if(ps->TxBuffer == INVALID_BUFFER)
return FALSE;
ps->TxCount = 0;
IPSetTxBuffer(ps->TxBuffer, sizeof(TCP_HEADER));
}
ps->Flags.bIsTxInProgress = TRUE;
MACPut(byte);
ps->RemoteWindow--;
tempCount = ps->TxCount;
tempCount++;
ps->TxCount = tempCount;
if(tempCount >= MAX_TCP_DATA_LEN)
TCPFlush(s);
return TRUE;
} |
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