sendto() never returns

fuchsc · August 27, 2020, 8:49am

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_kim · September 9, 2020, 5:05am

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.

fuchsc · September 9, 2020, 5:23am

Hi.
Thanks for your response.
I’ve made two posts with the same question, because the first was blocked for a long time.
I’ve already found the problem for myself, see

BR
Christian

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sendto() never returns

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