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px4-firmware/apps/examples/wlan/wlan_main.c

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/****************************************************************************
* examples/wlan/wlan_main.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Authors: Gregory Nutt <gnutt@nuttx.org>
* Rafael Noronha <rafael@pdsolucoes.com.br>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name Gregory Nutt nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <sched.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/usb/usbhost.h>
#include <net/if.h>
#include <nuttx/net/uip/uip.h>
#include <nuttx/net/uip/uip-arp.h>
#include <apps/netutils/uiplib.h>
/* DHCPC may be used in conjunction with any other feature (or not) */
#ifdef CONFIG_EXAMPLES_WLAN_DHCPC
# include <arpa/inet.h>
# include <apps/netutils/resolv.h>
# include <apps/netutils/dhcpc.h>
#endif
/****************************************************************************
* Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* Sanity checking */
#ifndef CONFIG_USBHOST
# error "CONFIG_USBHOST is not defined"
#endif
#ifdef CONFIG_USBHOST_BULK_DISABLE
# error "Bulk endpoints are disabled (CONFIG_USBHOST_BULK_DISABLE)"
#endif
#ifndef CONFIG_NFILE_DESCRIPTORS
# error "CONFIG_NFILE_DESCRIPTORS > 0 needed"
#endif
/* Provide some default values for other configuration settings */
#ifndef CONFIG_EXAMPLES_WLAN_DEFPRIO
# define CONFIG_EXAMPLES_WLAN_DEFPRIO 50
#endif
#ifndef CONFIG_EXAMPLES_WLAN_STACKSIZE
# define CONFIG_EXAMPLES_WLAN_STACKSIZE 1024
#endif
#ifndef CONFIG_EXAMPLES_WLAN_DEVNAME
# define CONFIG_EXAMPLES_WLAN_DEVNAME "wlan0"
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static struct usbhost_driver_s *g_drvr;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: wlan_bringup
*
* Description:
* Wait for USB devices to be connected.
*
****************************************************************************/
static inline void wlan_bringup(void)
{
#if defined(CONFIG_EXAMPLES_WLAN_DHCPC) || defined(CONFIG_EXAMPLES_WLAN_NOMAC)
uint8_t mac[IFHWADDRLEN];
#endif
struct in_addr addr;
#ifdef CONFIG_EXAMPLES_WLAN_DHCPC
void *handle;
#endif
/* Many embedded network interfaces must have a software assigned
* MAC
*/
#ifdef CONFIG_EXAMPLES_WLAN_NOMAC
mac[0] = 0x00;
mac[1] = 0xe0;
mac[2] = 0xde;
mac[3] = 0xad;
mac[4] = 0xbe;
mac[5] = 0xef;
uip_setmacaddr("eth0", mac);
#endif
/* Set up the default router address */
addr.s_addr = HTONL(CONFIG_EXAMPLES_WLAN_DRIPADDR);
uip_setdraddr("eth0", &addr);
/* Setup the subnet mask */
addr.s_addr = HTONL(CONFIG_EXAMPLES_WLAN_NETMASK);
uip_setnetmask("eth0", &addr);
/* Set up our host address */
#ifdef CONFIG_EXAMPLES_WLAN_DHCPC
addr.s_addr = 0;
#else
addr.s_addr = HTONL(CONFIG_EXAMPLES_WLAN_IPADDR);
#endif
uip_sethostaddr("eth0", &addr);
#ifdef CONFIG_EXAMPLES_WLAN_DHCPC
/* Set up the resolver */
resolv_init();
/* Get the MAC address of the NIC */
uip_getmacaddr("eth0", mac);
/* Set up the DHCPC modules */
handle = dhcpc_open(&mac, IFHWADDRLEN);
/* Get an IP address. Note: there is no logic here for renewing
* the address in this example. The address should be renewed in
* ds.lease_time/2 seconds.
*/
printf("Getting IP address\n");
if (handle)
{
struct dhcpc_state ds;
(void)dhcpc_request(handle, &ds);
uip_sethostaddr("eth1", &ds.ipaddr);
if (ds.netmask.s_addr != 0)
{
uip_setnetmask("eth0", &ds.netmask);
}
if (ds.default_router.s_addr != 0)
{
uip_setdraddr("eth0", &ds.default_router);
}
if (ds.dnsaddr.s_addr != 0)
{
resolv_conf(&ds.dnsaddr);
}
dhcpc_close(handle);
printf("IP: %s\n", inet_ntoa(ds.ipaddr));
}
#endif
}
/****************************************************************************
* Name: wlan_waiter
*
* Description:
* Wait for USB devices to be connected.
*
****************************************************************************/
static int wlan_waiter(int argc, char *argv[])
{
bool connected = false;
int ret;
printf("wlan_waiter: Running\n");
for (;;)
{
/* Wait for the device to change state */
ret = DRVR_WAIT(g_drvr, connected);
DEBUGASSERT(ret == OK);
connected = !connected;
printf("wlan_waiter: %s\n", connected ? "connected" : "disconnected");
/* Did we just become connected? */
if (connected)
{
/* Yes.. enumerate the newly connected device */
ret = DRVR_ENUMERATE(g_drvr);
/* If the enumeration was successful, then bring up the interface */
wlan_bringup();
}
}
/* Keep the compiler from complaining */
return 0;
}
/****************************************************************************
* Name: wlan_main
****************************************************************************/
int wlan_main(int argc, char *argv[])
{
pid_t pid;
int ret;
/* First, register all of the USB host Wireless LAN drivers */
printf("wlan_main: Register drivers\n");
ret = usbhost_wlaninit();
if (ret != OK)
{
printf("wlan_main: Failed to register the WLAN driver\n");
}
/* Then get an instance of the USB host interface */
printf("wlan_main: Initialize USB host WLAN driver\n");
g_drvr = usbhost_initialize(0);
if (g_drvr)
{
/* Start a thread to handle device connection. */
printf("wlan_main: Start wlan_waiter\n");
#ifndef CONFIG_CUSTOM_STACK
pid = task_create("usbhost", CONFIG_EXAMPLES_WLAN_DEFPRIO,
CONFIG_EXAMPLES_WLAN_STACKSIZE,
(main_t)wlan_waiter, (const char **)NULL);
#else
pid = task_create("usbhost", CONFIG_EXAMPLES_WLAN_DEFPRIO,
(main_t)wlan_waiter, (const char **)NULL);
#endif
/* Now just sleep. Eventually logic here will perform the device test. */
for (;;)
{
sleep(5);
printf("usert_start: Still alive\n");
}
}
return 0;
}
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