sendto() never returns

Question

Hi. I’m using W5500 connected to a Windows 10 PC. The network card has an IP addresse 192.168.137.3 with Subnet 255.255.255.0. W5500 has IP address 192.168.1.161, Subnet 255.255.255.0. If I’m sending a broadcast from PC the W5500 shall send a respond, but doesn’t. In Debugger I can see that the sendto() function doesn’t return because no Sn_IR_SENDOK or Sn_IR_TIMEOUT bit gets set. What can I do, to prevent endless looping in sendto() function? Thanks BR Christian

irina · Answer

I think I want to you refer to test the loopback test of this link. github.com Wiznet/ioLibrary_Driver/blob/master/Application/loopback/loopback.c #include <stdio.h> #include "loopback.h" #include "socket.h" #include "wizchip_conf.h" #if LOOPBACK_MODE == LOOPBACK_MAIN_NOBLCOK 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 : This file has been truncated. show original Also if you use the sendto() function, you have to enable the Sn_IR.