f6004b3260
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4440 42af7a65-404d-4744-a932-0658087f49c3
148 lines
4.9 KiB
C
148 lines
4.9 KiB
C
/****************************************************************************
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* examples/cdcacm/cdcacm_main.c
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <debug.h>
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#include <nuttx/usb/usbdev.h>
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#include <nuttx/usb/cdcacm.h>
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#include "cdcacm.h"
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* All global variables used by this example are packed into a structure in
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* order to avoid name collisions.
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*/
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struct cdcacm_state_s g_cdcacm;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* sercon_main
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*
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* Description:
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* This is the main program that configures the CDC/ACM serial device.
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*
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****************************************************************************/
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int sercon_main(int argc, char *argv[])
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{
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int ret;
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/* Check if there is a non-NULL USB mass storage device handle (meaning that the
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* USB mass storage device is already configured).
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*/
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if (g_cdcacm.handle)
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{
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message("sercon:: ERROR: Already connected\n");
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return EXIT_FAILURE;
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}
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/* Then, in any event, enable trace data collection as configured BEFORE
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* enabling the CDC/ACM device.
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*/
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usbtrace_enable(TRACE_BITSET);
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/* Initialize the USB CDC/ACM serial driver */
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message("sercon: Registering CDC/ACM serial driver\n");
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ret = cdcacm_initialize(CONFIG_EXAMPLES_CDCACM_DEVMINOR, &g_cdcacm.handle);
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if (ret < 0)
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{
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message("sercon: ERROR: Failed to create the CDC/ACM serial device: %d\n", -ret);
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return EXIT_FAILURE;
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}
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message("sercon: Successfully registered the CDC/ACM serial driver\n");
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return EXIT_SUCCESS;
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}
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/****************************************************************************
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* serdis_main
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*
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* Description:
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* This is a program entry point that will disconnect the CDC/ACM serial
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* device.
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*
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****************************************************************************/
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int serdis_main(int argc, char *argv[])
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{
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/* First check if the USB mass storage device is already connected */
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if (!g_cdcacm.handle)
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{
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message("serdis: ERROR: Not connected\n");
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return EXIT_FAILURE;
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}
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/* Then, in any event, disable trace data collection as configured BEFORE
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* enabling the CDC/ACM device.
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*/
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usbtrace_enable(0);
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/* Then disconnect the device and uninitialize the USB mass storage driver */
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cdcacm_uninitialize(g_cdcacm.handle);
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g_cdcacm.handle = NULL;
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message("serdis: Disconnected\n");
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return EXIT_SUCCESS;
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}
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