133 lines
3.9 KiB
C
133 lines
3.9 KiB
C
/****************************************************************************
|
|
* examples/serialblaster/serialblaster_main.c
|
|
*
|
|
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
|
|
* Authors: Gregory Nutt <gnutt@nuttx.org>
|
|
* Bob Doiron
|
|
*
|
|
* 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <nuttx/clock.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <nuttx/fs/fs.h>
|
|
#include <nuttx/arch.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
#define BUFFERED_IO
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
static const char s[] = "abcdefghijklmnopqrstuvwxyz";
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* serialblaster_main
|
|
****************************************************************************/
|
|
|
|
int main(int argc, FAR char *argv[])
|
|
{
|
|
int ret;
|
|
int fd;
|
|
FAR char *devpath;
|
|
int size = 0;
|
|
int rem;
|
|
|
|
if (argc == 1)
|
|
{
|
|
devpath = CONFIG_EXAMPLES_SERIALBLASTER_DEVPATH;
|
|
}
|
|
else if (argc == 2)
|
|
{
|
|
devpath = argv[1];
|
|
}
|
|
else if (argc == 3)
|
|
{
|
|
devpath = argv[1];
|
|
size = strtol(argv[2], NULL, 10);
|
|
}
|
|
else
|
|
{
|
|
fprintf(stderr, "Usage: %s [devpath]\n", argv[0]);
|
|
goto errout;
|
|
}
|
|
|
|
fd = open(devpath, O_RDWR);
|
|
if (fd < 0)
|
|
{
|
|
printf("dev_ttyS2: ERROR Failed to open /dev/ttyS2\n");
|
|
return -1;
|
|
}
|
|
|
|
rem = size;
|
|
while (size > sizeof(s))
|
|
{
|
|
if (rem > 26)
|
|
{
|
|
ret = write(fd, s, (sizeof(s)-1));
|
|
}
|
|
|
|
rem = rem - 26;
|
|
if (rem < 26)
|
|
{
|
|
ret = write(fd, s, rem);
|
|
}
|
|
|
|
size = size - 26;
|
|
UNUSED(ret);
|
|
}
|
|
|
|
up_udelay(5000000);
|
|
close(fd);
|
|
return 0;
|
|
|
|
errout:
|
|
fflush(stderr);
|
|
return EXIT_FAILURE;
|
|
}
|