w5300 hold interrupt pin asserted low

Question

Hello! I am using w5300 as server in TCP mode. W5300 connected to DSP. I have a w5300 driver and it work fine in some task. Now I have a new task, where data flow increase, and after some second of interconection with PC client, w5300 drop interrupt pin, and I can’t acknowledge it in ISR for inerrupt complete.

sparrow · Answer

Ok, thank you! Add this to my ISR. Now I have interest conditionof wiznet chip, when RSR value is 0. And SSR value is 0x11. I assume, that rx fifo is full at this time. Is it so?

sparrow · Answer

Thank you! First phenomenon from errata seems like to my problem. But I not execute close/disconnect. DSP just send data and freezes at waiting for SENDOK acknowledgment: WIZnetSendOk[n]=false; wrWIZnetReg(Sn_CR(n))=CMD_SEND; while(!WIZnetSendOk[n]); ////(WIZnetSendOk[n] set in ISR)

sparrow · Answer

void WIZnetWrite(BYTE *Buf,long Length,long n) { long LocLen,i,j,k,ind,FreeSpace; WORD dataWrite; WORD* wp = (WORD*)Buf; if(WIZnetSocketState[n] != CONNECTED) return; if(((DWORD)Buf)&0x01) { WritingCycle(oddCopy,Buf,Length,n); } else { WritingCycle(evenCopy,Buf,Length,n); } } void WritingCycle(DataOperation f,BYTE *Buf,long Length,long n) { long LocLen,ind,j,FreeSpace; WORD dataWrite; FreeSpace=getFreeSpace(n); for(ind=0;ind<Length && WIZnetSocketState[n] == CONNECTED;) { if(FreeSpace == 0) { for(j=1000/5;j>0;j--) // ~1000 нс asm("nop;"); FreeSpace=getFreeSpace(n); if(FreeSpace == 0) continue; } LocLen=min((Length-ind),FreeSpace); f(LocLen,Buf,ind,n); setSizeTxData(n,LocLen); ssync(); WIZnetSendOk[n]=false; wrWIZnetReg(Sn_CR(n))=CMD_SEND; DWORD guard=1000000; while(!WIZnetSendOk[n]) { asm("nop;"); } dataWrite=rdWIZnetReg(Sn_MR(n)); ssync(); ind+=LocLen; } return; } inline void oddCopy(long WrLen, BYTE* Buf,long ind,long n) { long i=0,k=0; WORD dataWrite; for (i=0;i<WrLen/2;i++) { dataWrite = (Buf[ind+k])|(Buf[ind+k+1]<<8); wrWIZnetReg(Sn_TX_FIFOR(n))=dataWrite;; k+=2; } if (WrLen&0x01) { wrWIZnetReg(Sn_TX_FIFOR(n))=(WORD)(Buf[ind+k]); k++; } }

sparrow · Answer

Thank you! I add your modification, but still has 0x11 at SSR. I add guard counter and sending CMD_DISCON for case where counter decrement to 0. This so rough, but reconnect reset 0x11 state. And…not always. Have you idea how to avoid this state?

sparrow · Answer

So this udp sending didn’t break current tcp connection?

sparrow · Answer

Please, explain, whether the current connection will be preserved?