Halo,
I’m trying to setup a simple webservice server on your wiz550io board and faced some strange behavior. Please explain what a I doing wrong and how to fix it. Heres what I do:
first I reset w5500 and wait for its RDY signal:
gpio_set_pin_high(LAN_RST);
delay_ms(500);
gpio_set_pin_low(LAN_RST);
delay_ms(500);
gpio_set_pin_high(LAN_RST);
while ( gpio_pin_is_low( LAN_RDY ) );
// follow below
then I initiate w5500 with default buffers size:
reg_wizchip_cs_cbfunc(wizchip_select, wizchip_deselect);
reg_wizchip_spi_cbfunc(wizchip_read, wizchip_write);
wizchip_init( null,null );
// follow below
next I initiate interrupt:
cpu_irq_disable();
ext_int_set_interrupt_callback( LAN_INT, lan_int_callback );
ext_int_init( LAN_INT, IOPORT_SENSE_FALLING );
wizchip_setinterruptmask( IK_SOCK_3 );
ctlsocket( 3, CS_SET_INTMASK, SIK_ALL );
cpu_irq_enable();
// follow below
open socket, put it on listen and wait:
socket(3,Sn_MR_TCP,80,SF_TCP_NODELAY);
listen(3);
while(1);
// follow below
my irq callback looks as follows:
static void lan_int_callback(void)
{
ctlsocket(3, CS_GET_INTERRUPT, &i );
switch( getSn_SR(3) )
{
case SOCK_ESTABLISHED:
if( getSn_IR(3) & Sn_IR_CON )
{
WIZCHIP_WRITE( getSn_IR(3), Sn_IR_CON );
}
if( getSn_IR(3) & Sn_IR_RECV )
{
int8_t len = recv( 3, &buf, 20 );
send( 3, &buf, len );
disconnect(3);
lan_int_callback(); // <- no SIK_DISCONNECTED
}
break;
case SOCK_CLOSE_WAIT:
disconnect(3);
break;
case SOCK_CLOSED:
close(3);
socket(3,Sn_MR_TCP,80,SF_TCP_NODELAY);
case SOCK_INIT:
listen(3);
break;
}
ctlsocket(3, CS_CLR_INTERRUPT, &i );
}
Heres what the problems are:
-
once I run it, and point my browser onto 192.168.1.2/test.html I recieve something ( not necessary whats expected i.e. /test.html ) after refersh I recieve something else and so on - basically it looks like the chip is sending back quite random portion of socket buffer ( sometimes it sends back expected /test.html but only from time to time )
-
I never recieve interrupts other than SIK_CONNECTED and SIK_RECEIVED so I need to reinvoke irq callback manually after disconnecting client in line marked with // ← no SIK_DISCONNECTED
-
after quick repeating tries to connect from client ( I keep F5 in my browser pushed for a couple of seconds ) the whole thing simply hangs and mu browser shows “the connection has been reset” forever
Thanks a lot in advance 
