WIZ550IO Can not send UDP broadcast message

Question

I am trying to answer udp broadcast message but even I have not get any error during send, message does not recieved by computer. Here my code void main(void) { unsigned char i; uint8_t macread[8]; SYSTEM_Initialize(); //w5500 __delay_ms(30); printf("W5500 EVB initialization over. "); WIZ550_PWR_SetLow(); Reset_W5500();/*Ó²ÖØÆôW5500*/ printf("W5500 initialized! "); setSHAR(mac);/*ÅäÖÃMacµØÖ·*/ setSUBR(sub);/*ÅäÖÃ×ÓÍøÑÚÂë*/ setGAR(gw);/*ÅäÖÃÄ¬ÈÏÍø¹Ø*/ setSIPR(lip);/*ÅäÖÃIpµØÖ·*/ //Init. TX & RX Memory size of w5500 wizchip_init(w5500_tx_buffer_len,w5500_rx_buffer_len); setRTR(2000);/*ÉèÖÃÒç³öÊ±¼äÖµ*/ setRCR(3);/*ÉèÖÃ×î´óÖØÐÂ·¢ËÍ´ÎÊý*/ getSIPR(ip); printf("IP : %d.%d.%d.%d ", ip[0],ip[1],ip[2],ip[3]); getSUBR(ip); printf("SN : %d.%d.%d.%d ", ip[0],ip[1],ip[2],ip[3]); getGAR(ip); printf("GW : %d.%d.%d.%d ", ip[0],ip[1],ip[2],ip[3]); getSHAR(macread); printf("MAC : %02X:%02X:%02X:%02X:%02X:%02X ", macread[0],macread[1],macread[2],macread[3],macread[4],macread[5]); printf("Network is ready. "); //w5500 while (1) { // Add your application code for(i=0;i<_WIZCHIP_SOCK_NUM_-1;i++) { loopback_tcps(i,buffer,port+i); } i=_WIZCHIP_SOCK_NUM_-1; loopback_udps(i,buffer,65535); } } int32_t loopback_udps(uint8_t sn, uint8_t* buf, uint16_t port) { int32_t ret; uint16_t size, sentsize; uint8_t destip[4]; uint16_t destport; switch(getSn_SR(sn)) { case SOCK_UDP : if((size = getSn_RX_RSR(sn)) > 0) { if(size > DATA_BUF_SIZE) size = DATA_BUF_SIZE; ret = recvfrom(sn, buf, size, destip, (uint16_t*)&destport); if(ret <= 0) { #ifdef _LOOPBACK_DEBUG_ printf("%d: recvfrom error. %ld ",sn,ret); #endif return ret; } printf(" IP:%u.%u.%u.%u port:%u DATA:",destip[0],destip[1],destip[2],destip[3],destport); size = (uint16_t) ret; buf[size]=0; printf("%s",buf); sentsize = 0; while(sentsize != size) { // destip[0]=255; // destip[1]=255; // destip[2]=255; // destip[3]=255; ret = sendto(sn, buf+sentsize, size-sentsize, destip, destport); if(ret < 0) { #ifdef _LOOPBACK_DEBUG_ printf("%d: sendto error. %ld ",sn,ret); #endif return ret; } else { printf(" send: %ld ",ret); } sentsize += ret; // Don't care SOCKERR_BUSY, because it is zero. } } break; case SOCK_CLOSED: #ifdef _LOOPBACK_DEBUG_ //printf("%d:UDP loopback start ",sn); #endif if((ret = socket(sn, Sn_MR_UDP, port, SF_MULTI_ENABLE)) != sn) return ret; #ifdef _LOOPBACK_DEBUG_ printf("%d:Opened, UDP loopback, port [%u] ", sn, port); #endif break; default : break; } return 1; } int32_t loopback_tcps(uint8_t sn, uint8_t* buf, uint16_t port) { int32_t ret; uint16_t size = 0, sentsize=0; #ifdef _LOOPBACK_DEBUG_ uint8_t destip[4]; uint16_t destport; #endif switch(getSn_SR(sn)) { case SOCK_ESTABLISHED : if(getSn_IR(sn) & Sn_IR_CON) { #ifdef _LOOPBACK_DEBUG_ getSn_DIPR(sn, destip); destport = getSn_DPORT(sn); printf("%d:Connected - %d.%d.%d.%d : %u ",sn, destip[0], destip[1], destip[2], destip[3], destport); #endif setSn_IR(sn,Sn_IR_CON); } if((size = getSn_RX_RSR(sn)) > 0) // Don't need to check…

Eugeny · Answer

The fact that hasanyildiz: message does not recieved by computer. does not mean there’s nothing being sent. Look at the Wireshark log to identify what is being sent by W5500. If there’s really nothing send at the respective time, then close consideration of the code will be needed.

Eugeny · Answer

That’s why you need to look at what is actually going on the network in faulty setup instead of trying to guess what it could be.

hasanyildiz · Answer

I did not see any broadcast or data from the w5500. Is there any setting should be made on wireshart to check more detailed way.

Eugeny · Answer

If there’s nothing on the wire, then you have set up the chip wrongly. You must review IP address/mask, MAC address and other settings to be correct. Do you say that when you change IP address (from whic one to which one?) it starts working and you can see respective packets on the network?

hasanyildiz · Answer

Thank you Eugeny. I start from beginign and find out the mistake. The flag variable of the socket subroutine set wrong. Now everything work fine. Best regards, Hasan YILDIZ Hiroshima (A Little Girl / The Dead Girl) It’s me knocking on the doors On the doors one after the other I can’t be seen in your eyes For deaths can’t be seen in eyes It has been some ten years Since I died in Hiroshima But I’m still a seven years old girl Dead children don’t grow up My hair was the first to catch the fire My eyes burned and charred I just became a handful of ashes My ashes got scattered into the air (There’s nothing at all that I’m asking you for myself Well, a child who burned like a paper can’t even eat candies) I’m knocking on your door… Aunt, uncle, give a signature… Children shalln’t get killed So that they are also able to eat candies Nazim Hikmet