//软件中断 使用中断4
//该中断函数用于将数据通过USART2发送到SIM900模块
void EXTI4_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line4) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line4);
pppos_input(pd,USART2_RX_BUF,USART2_RX_STA_BACKUP&0x3fff);
}
}
/* 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 !LWIP_NETIF_LOOPBACK_MULTITHREADING
/* check for loopback packets on all netifs */
netif_poll_all();
#endif /* !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 */
}
/* 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 :-) */
static void
main_loop(void)
{
#if !NO_SYS
err_t err;
sys_sem_t init_sem;
#endif /* NO_SYS */
#if USE_PPP
#if !USE_ETHERNET
int count;
u8_t rxbuf[1024];
#endif
volatile int callClosePpp = 0;
#endif /* USE_PPP */
/* 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);
LWIP_ASSERT("failed to create init_sem", err == ERR_OK);
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 */
#if (LWIP_SOCKET || LWIP_NETCONN) && LWIP_NETCONN_SEM_PER_THREAD
netconn_thread_init();
#endif
/* 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 */
/* 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, rxbuf, count);
} else {
/* 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 USE_PPP
{
int do_hup = 0;
if(do_hup) {
ppp_close(ppp, 1);
do_hup = 0;
}
}
if(callClosePpp && ppp) {
/* make sure to disconnect PPP before stopping the program... */
callClosePpp = 0;
#if NO_SYS
ppp_close(ppp, 0);
#else
pppapi_close(ppp, 0);
#endif
ppp = NULL;
}
#endif /* USE_PPP */
}
#if USE_PPP
if(ppp) {
u32_t started;
printf("Closing PPP connection...\n");
/* make sure to disconnect PPP before stopping the program... */
#if NO_SYS
ppp_close(ppp, 0);
#else
pppapi_close(ppp, 0);
#endif
ppp = NULL;
/* 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 /* USE_PPP */
#if (LWIP_SOCKET || LWIP_NETCONN) && LWIP_NETCONN_SEM_PER_THREAD
netconn_thread_cleanup();
#endif
#if USE_ETHERNET
/* release the pcap library... */
pcapif_shutdown(&netif);
#endif /* USE_ETHERNET */
}
static void gprs_input_internal(gprs_t * gprs,u8_t * data,u32_t length)
{
if (length > 0)
{
#if 0
LWIP_DEBUGF(GPRS_DEBUG,("gprs: Got %lu bytes state=%d\n",(unsigned long)length,gprs->state));
#endif
switch (gprs->state)
{
default:
LWIP_DEBUGF(GPRS_DEBUG,("gprs: Ignored %lu bytes\n",(unsigned long)length));
break;
case GPRS_STATE_MODEM_DIAL:
modem_check_reply(gprs,data,length,do_modem_dial_reply);
if (gprs->connected)
{
gprs_do_connect(gprs);
}
break;
case GPRS_STATE_GPRS_NETWORK:
do_gprs_network_check(gprs,data,length);
break;
case GPRS_STATE_GSM_NETWORK:
do_gsm_network_check(gprs,data,length);
break;
case GPRS_STATE_MODEM_IMEI:
if (modem_check_reply(gprs,data,length,do_modem_imei_reply) == MODEM_REPLY_OK)
{
#if GPRS_ICCID
do_sim_iccid(gprs);
#else
do_gsm_network(gprs);
#endif
}
break;
#if GPRS_ICCID
case GPRS_STATE_MODEM_CCID:
if (modem_check_reply(gprs,data,length,do_sim_iccid_reply) == MODEM_REPLY_OK)
{
do_gsm_network(gprs);
}
break;
#endif
case GPRS_STATE_MODEM_IDENTIFY:
if (modem_check_reply(gprs,data,length,do_modem_identify_reply) == MODEM_REPLY_OK)
{
do_modem_imei(gprs);
}
break;
case GPRS_STATE_MODEM_INIT:
if (modem_check_ok_reply(gprs,data,length))
{
do_modem_dial(gprs);
}
break;
case GPRS_STATE_MODEM_ALIVE:
if (modem_check_ok_reply(gprs,data,length))
{
do_modem_identify(gprs);
}
break;
case GPRS_STATE_CONNECTING:
case GPRS_STATE_CONNECTED:
pppos_input(gprs->pcb,data,length);
break;
}
}
}