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/****************************************************************************
*
* Copyright 2016 Samsung Electronics All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific
* language governing permissions and limitations under the License.
*
****************************************************************************/
/****************************************************************************
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 NuttX 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.
*
****************************************************************************/
/// @file tash_init.c
/// @brief functions to initialize TinyAra SHell (TASH)
#include <stdio.h>
#include <sys/types.h>
#include <fcntl.h>
#if defined(CONFIG_CDCACM_CONSOLE)
#include <tinyara/usb/cdcacm.h>
#endif
#include "tash_internal.h"
#ifdef CONFIG_TASH
/** @brief TASH non FTDI usb console init
* @ingroup tash
*/
#if defined(CONFIG_CDCACM_CONSOLE)
static int tash_nonftdi_usbconinit(void)
{
int ret = OK;
int nlc;
int fd;
char inch;
ssize_t nbytes;
#if defined(CONFIG_CDCACM)
#define CONFIG_TASH_USBCONSOLE "/dev/ttyACM0"
#define CONFIG_USBDEV_MINOR 0
ret = cdcacm_initialize(CONFIG_USBDEV_MINOR, NULL);
/* For future
if (ret != 0)
RETRY logic
*/
#endif
restart:
do {
/* Try to open the console */
fd = open(CONFIG_TASH_USBCONSOLE, O_RDWR);
if (fd < 0) {
/* ENOTCONN means that the USB device is not yet connected. Anything
* else is bad.
*/
//DEBUGASSERT(errno == ENOTCONN);
/* Sleep a bit and try again */
sleep(2);
}
} while (fd < 0);
nlc = 0;
do {
/* Read one byte */
inch = 0;
nbytes = read(fd, &inch, 1);
/* Is it a carriage return (or maybe a newline)? */
if (nbytes == 1 && (inch == '\n' || inch == '\r')) {
/* Yes.. increment the count */
nlc++;
} else {
/* No.. Reset the count. We need to see 3 in a row to continue. */
nlc = 0;
/* If a read error occurred (nbytes < 0) or an end-of-file was
* encountered (nbytes == 0), then close the driver and start
* over.
*/
if (nbytes <= 0) {
(void)close(fd);
goto restart;
}
}
} while (nlc < 2);
(void)fclose(stdin);
(void)fclose(stdout);
(void)fclose(stderr);
/* Dup the fd to create standard fd 0-2 */
(void)dup2(fd, 0);
(void)dup2(fd, 1);
(void)dup2(fd, 2);
/* fdopen to get the stdin, stdout and stderr streams. The following logic depends
* on the fact that the library layer will allocate FILEs in order. And since
* we closed stdin, stdout, and stderr above, that is what we should get.
*
* fd = 0 is stdin (read-only)
* fd = 1 is stdout (write-only, append)
* fd = 2 is stderr (write-only, append)
*/
(void)fdopen(0, "r");
(void)fdopen(1, "a");
(void)fdopen(2, "a");
if (fd > 2) {
close(fd);
}
return ret;
}
#endif
int tash_init(void)
{
int ret = OK;
tash_register_basic_cmds();
#if defined(CONFIG_CDCACM_CONSOLE)
if (tash_nonftdi_usbconinit() != 0) {
ret = ERROR;
}
#endif
return ret;
}
#endif /* CONFIG_TASH */
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