STATIC void slip_lwip_poll(void *netif) {
slipif_poll((struct netif*)netif);
}
/* This is somewhat different to other ports: we have a main loop here:
* a dedicated task that waits for packets to arrive. This would normally be
* done from interrupt context with embedded hardware, but we don't get an
* interrupt in windows for that :-) */
void main_loop()
{
#if !NO_SYS
err_t err;
sys_sem_t init_sem;
#endif /* NO_SYS */
#if PPP_SUPPORT
#if !USE_ETHERNET
int count;
u8_t rxbuf[1024];
#endif
volatile int callClosePpp = 0;
#endif /* PPP_SUPPORT */
/* initialize lwIP stack, network interfaces and applications */
#if NO_SYS
lwip_init();
test_init(NULL);
#else /* NO_SYS */
err = sys_sem_new(&init_sem, 0);
tcpip_init(test_init, &init_sem);
/* we have to wait for initialization to finish before
* calling update_adapter()! */
sys_sem_wait(&init_sem);
sys_sem_free(&init_sem);
#endif /* NO_SYS */
/* MAIN LOOP for driver update (and timers if NO_SYS) */
while (!_kbhit()) {
#if NO_SYS
/* handle timers (already done in tcpip.c when NO_SYS=0) */
sys_check_timeouts();
#endif /* NO_SYS */
#if USE_ETHERNET
#if !PCAPIF_RX_USE_THREAD
/* check for packets and link status*/
pcapif_poll(&netif);
/* When pcapif_poll comes back, there are not packets, so sleep to
prevent 100% CPU load. Don't do this in an embedded system since it
increases latency! */
sys_msleep(1);
#else /* !PCAPIF_RX_USE_THREAD */
sys_msleep(50);
#endif /* !PCAPIF_RX_USE_THREAD */
#else /* USE_ETHERNET */
#if 0 /* set this to 1 if PPP_INPROC_OWNTHREAD==0 or not defined (see ppp.c) */
/* try to read characters from serial line and pass them to PPPoS */
count = sio_read(ppp_sio, (u8_t*)rxbuf, 1024);
if(count > 0) {
pppos_input(ppp_desc, rxbuf, count);
} else
#endif
{
/* nothing received, give other tasks a chance to run */
sys_msleep(1);
}
#endif /* USE_ETHERNET */
#if USE_SLIPIF
slipif_poll(&slipif1);
#if USE_SLIPIF > 1
slipif_poll(&slipif2);
#endif /* USE_SLIPIF > 1 */
#endif /* USE_SLIPIF */
#if ENABLE_LOOPBACK && !LWIP_NETIF_LOOPBACK_MULTITHREADING
/* check for loopback packets on all netifs */
netif_poll_all();
#endif /* ENABLE_LOOPBACK && !LWIP_NETIF_LOOPBACK_MULTITHREADING */
#if PPP_SUPPORT
{
int do_hup = 0;
if(do_hup) {
pppSigHUP(ppp_desc);
do_hup = 0;
}
}
if(callClosePpp && (ppp_desc >= 0)) {
/* make sure to disconnect PPP before stopping the program... */
callClosePpp = 0;
#if NO_SYS
pppClose(ppp_desc);
#else
tcpip_callback_with_block(pppCloseCallback, (void*)ppp_desc, 0);
#endif
ppp_desc = -1;
}
#endif /* PPP_SUPPORT */
}
#if PPP_SUPPORT
if(ppp_desc >= 0) {
u32_t started;
printf("Closing PPP connection...\n");
/* make sure to disconnect PPP before stopping the program... */
#if NO_SYS
pppClose(ppp_desc);
#else
tcpip_callback_with_block(pppCloseCallback, (void*)ppp_desc, 0);
#endif
ppp_desc = -1;
/* Wait for some time to let PPP finish... */
started = sys_now();
do
{
#if USE_ETHERNET && !PCAPIF_RX_USE_THREAD
pcapif_poll(&netif);
#else /* USE_ETHERNET && !PCAPIF_RX_USE_THREAD */
sys_msleep(50);
#endif /* USE_ETHERNET && !PCAPIF_RX_USE_THREAD */
/* @todo: need a better check here: only wait until PPP is down */
} while(sys_now() - started < 5000);
}
#endif /* PPP_SUPPORT */
#if USE_ETHERNET
/* release the pcap library... */
pcapif_shutdown(&netif);
#endif /* USE_ETHERNET */
}
//
// Polls the lwIP stack.
//
void
cyg_lwip_simple_poll(void)
{
cyg_tick_count_t ticks;
cyg_uint32 delta;
int i;
#if LWIP_HAVE_SLIPIF && defined(CYGIMP_LWIP_SLIPIF_INSTANCE)
// Poll SLIP device
slipif_poll(&slipif);
#endif
#if PPP_SUPPORT
// Poll PPP device
#endif
#ifdef CYGPKG_LWIP_ETH
{
cyg_netdevtab_entry_t *t;
// Poll ethernet devices
for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) {
struct eth_drv_sc *sc = (struct eth_drv_sc *)t->device_instance;
if (sc->state & ETH_DRV_NEEDS_DELIVERY) {
#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
cyg_bool was_ctrlc_int;
#endif
sc->state &= ~ETH_DRV_NEEDS_DELIVERY;
#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
was_ctrlc_int = HAL_CTRLC_CHECK(sc->funs->int_vector(sc),
(int) sc);
if (!was_ctrlc_int) // Fall through and run normal code
#endif
sc->funs->deliver(sc);
}
}
// Deliver received packets
while (recv_packet_count > 0) {
ethernet_input(recv_packet[recv_packet_read].p,
recv_packet[recv_packet_read].netif);
recv_packet_read = (recv_packet_read + 1) % MAX_RECV_PACKETS;
recv_packet_count--;
}
}
#endif
// Process timers
ticks = cyg_current_time();
delta = TICKS_TO_MS(ticks - last_ticks);
last_ticks = ticks;
// The following check 'delta > 0' rejects a potential wrap-around in the
// system ticks counter.
if (delta > 0) {
for (i = 0; i < NUM_LWIP_TIMERS; i++) {
lwip_timers[i].time += delta;
if (lwip_timers[i].time >= lwip_timers[i].interval) {
lwip_timers[i].timer_func();
lwip_timers[i].time -= lwip_timers[i].interval;
}
}
}
}
