diff options
Diffstat (limited to 'nuttx/drivers/serial/lowconsole.c')
-rw-r--r-- | nuttx/drivers/serial/lowconsole.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/nuttx/drivers/serial/lowconsole.c b/nuttx/drivers/serial/lowconsole.c new file mode 100644 index 000000000..1fac49a57 --- /dev/null +++ b/nuttx/drivers/serial/lowconsole.c @@ -0,0 +1,132 @@ +/**************************************************************************** + * drivers/serial/lowconsole.c + * + * Copyright (C) 2008-2009, 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <errno.h> +#include <debug.h> + +#include <nuttx/arch.h> +#include <nuttx/fs/fs.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/* The architecture must provide up_putc for this driver */ + +#ifndef CONFIG_ARCH_LOWPUTC +# error "Architecture must provide up_putc() for this driver" +#endif + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +static ssize_t lowconsole_read(struct file *filep, char *buffer, size_t buflen); +static ssize_t lowconsole_write(struct file *filep, const char *buffer, size_t buflen); +static int lowconsole_ioctl(struct file *filep, int cmd, unsigned long arg); + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +static const struct file_operations g_consoleops = +{ + 0, /* open */ + 0, /* close */ + lowconsole_read, /* read */ + lowconsole_write, /* write */ + 0, /* seek */ + lowconsole_ioctl /* ioctl */ +#ifndef CONFIG_DISABLE_POLL + , 0 /* poll */ +#endif +}; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: lowconsole_ioctl + ****************************************************************************/ + +static int lowconsole_ioctl(struct file *filep, int cmd, unsigned long arg) +{ + return -ENOTTY; +} + +/**************************************************************************** + * Name: lowconsole_read + ****************************************************************************/ + +static ssize_t lowconsole_read(struct file *filep, char *buffer, size_t buflen) +{ + return 0; +} + +/**************************************************************************** + * Name: lowconsole_write + ****************************************************************************/ + +static ssize_t lowconsole_write(struct file *filep, const char *buffer, size_t buflen) +{ + ssize_t ret = buflen; + + for (; buflen; buflen--) + { + up_putc(*buffer++); + } + return ret; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: lowconsole_init +****************************************************************************/ + +void lowconsole_init(void) +{ + (void)register_driver("/dev/console", &g_consoleops, 0666, NULL); +} |