/****************************************************************************
* examples/hidkbd/null_main.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sched.h>
#include <errno.h>
#include <nuttx/usb/usbhost.h>
/****************************************************************************
* Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* Sanity checking */
#ifndef CONFIG_USBHOST
# error "CONFIG_USBHOST is not defined"
#endif
#ifdef CONFIG_USBHOST_INT_DISABLE
# error "Interrupt endpoints are disabled (CONFIG_USBHOST_INT_DISABLE)"
#endif
#ifndef CONFIG_NFILE_DESCRIPTORS
# error "CONFIG_NFILE_DESCRIPTORS > 0 needed"
#endif
/* Provide some default values for other configuration settings */
#ifndef CONFIG_EXAMPLES_HIDKBD_DEFPRIO
# define CONFIG_EXAMPLES_HIDKBD_DEFPRIO 50
#endif
#ifndef CONFIG_EXAMPLES_HIDKBD_STACKSIZE
# define CONFIG_EXAMPLES_HIDKBD_STACKSIZE 1024
#endif
#ifndef CONFIG_EXAMPLES_HIDKBD_DEVNAME
# define CONFIG_EXAMPLES_HIDKBD_DEVNAME "/dev/kbda"
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static struct usbhost_driver_s *g_drvr;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: hidkbd_waiter
*
* Description:
* Wait for USB devices to be connected.
*
****************************************************************************/
static int hidkbd_waiter(int argc, char *argv[])
{
bool connected = false;
int ret;
printf("hidkbd_waiter: Running\n");
for (;;)
{
/* Wait for the device to change state */
ret = DRVR_WAIT(g_drvr, connected);
DEBUGASSERT(ret == OK);
connected = !connected;
printf("hidkbd_waiter: %s\n", connected ? "connected" : "disconnected");
/* Did we just become connected? */
if (connected)
{
/* Yes.. enumerate the newly connected device */
(void)DRVR_ENUMERATE(g_drvr);
}
}
/* Keep the compiler from complaining */
return 0;
}
/****************************************************************************
* Name: user_start
****************************************************************************/
int user_start(int argc, char *argv[])
{
char buffer[256];
pid_t pid;
ssize_t nbytes;
int fd;
int ret;
/* First, register all of the USB host HID keyboard class driver */
printf("user_start: Register class drivers\n");
ret = usbhost_kbdinit();
if (ret != OK)
{
printf("user_start: Failed to register the KBD class\n");
}
/* Then get an instance of the USB host interface */
printf("user_start: Initialize USB host keyboard driver\n");
g_drvr = usbhost_initialize(0);
if (g_drvr)
{
/* Start a thread to handle device connection. */
printf("user_start: Start hidkbd_waiter\n");
#ifndef CONFIG_CUSTOM_STACK
pid = task_create("usbhost", CONFIG_EXAMPLES_HIDKBD_DEFPRIO,
CONFIG_EXAMPLES_HIDKBD_STACKSIZE,
(main_t)hidkbd_waiter, (const char **)NULL);
#else
pid = task_create("usbhost", CONFIG_EXAMPLES_HIDKBD_DEFPRIO,
(main_t)hidkbd_waiter, (const char **)NULL);
#endif
/* Now just sleep. Eventually logic here will open the kbd device and
* perform the HID keyboard test.
*/
for (;;)
{
/* Open the keyboard device. Loop until the device is successfully
* opened.
*/
do
{
printf("Opening device %s\n", CONFIG_EXAMPLES_HIDKBD_DEVNAME);
fd = open(CONFIG_EXAMPLES_HIDKBD_DEVNAME, O_RDONLY);
if (fd < 0)
{
printf("Failed: %d\n", errno);
fflush(stdout);
sleep(3);
}
}
while (fd < 0);
printf("Device %s opened\n", CONFIG_EXAMPLES_HIDKBD_DEVNAME);
fflush(stdout);
/* Loop until there is a read failure */
do
{
/* Read a buffer of data */
nbytes = read(fd, buffer, 256);
if (nbytes > 0)
{
/* On success, echo the buffer to stdout */
(void)write(1, buffer, nbytes);
}
}
while (nbytes >= 0);
printf("Closing device %s: %d\n", CONFIG_EXAMPLES_HIDKBD_DEVNAME, (int)nbytes);
fflush(stdout);
close(fd);
}
}
return 0;
}
