/****************************************************************************
* configs/sam4s-xplained-pro/src/sam_tc.c
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Author: 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 <sys/types.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <debug.h>
#include <sched.h>
#include <stdio.h>
#include <fcntl.h>
#include <nuttx/timer.h>
#include <nuttx/clock.h>
#include <nuttx/kthread.h>
#include <arch/board/board.h>
#include "sam_lowputc.h"
#include "sam_tc.h"
#ifdef CONFIG_TIMER
/****************************************************************************
* Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* Watchdog hardware should be enabled */
#if !defined(CONFIG_SAM34_TC0)
# warning "CONFIG_SAM34_TC0 must be defined"
#endif
/* Select the path to the registered watchdog timer device */
#ifndef CONFIG_TIMER0_DEVPATH
# define CONFIG_TIMER0_DEVPATH "/dev/tc0"
# define CONFIG_TIMER1_DEVPATH "/dev/tc1"
# define CONFIG_TIMER2_DEVPATH "/dev/tc2"
# define CONFIG_TIMER3_DEVPATH "/dev/tc3"
# define CONFIG_TIMER4_DEVPATH "/dev/tc4"
# define CONFIG_TIMER5_DEVPATH "/dev/tc5"
#endif
/* Timer Definitions ********************************************************/
#define TINTERVAL (3042)
/* Debug ********************************************************************/
/* Non-standard debug that may be enabled just for testing the watchdog
* timer
*/
#ifndef CONFIG_DEBUG
# undef CONFIG_DEBUG_TIMER
#endif
#ifdef CONFIG_DEBUG_TIMER
# define tcdbg dbg
# define tclldbg lldbg
# ifdef CONFIG_DEBUG_VERBOSE
# define tcvdbg vdbg
# define tcllvdbg llvdbg
# else
# define tcvdbg(x...)
# define tcllvdbg(x...)
# endif
#else
# define tcdbg(x...)
# define tclldbg(x...)
# define tcvdbg(x...)
# define tcllvdbg(x...)
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_timerinitialize()
*
* Description:
* Perform architecture-specific initialization of the timer hardware.
*
****************************************************************************/
int sam_timerinitialize(void)
{
int fd;
int ret;
/* Initialize and register the timer devices */
#if defined(CONFIG_SAM34_TC0)
tcvdbg("Initializing %s...\n", CONFIG_TIMER0_DEVPATH);
sam_tcinitialize(CONFIG_TIMER0_DEVPATH, SAM_IRQ_TC0);
#endif
#if defined(CONFIG_SAM34_TC1)
tcvdbg("Initializing %s...\n", CONFIG_TIMER1_DEVPATH);
sam_tcinitialize(CONFIG_TIMER1_DEVPATH, SAM_IRQ_TC1);
#endif
#if defined(CONFIG_SAM34_TC2)
tcvdbg("Initializing %s...\n", CONFIG_TIMER2_DEVPATH);
sam_tcinitialize(CONFIG_TIMER2_DEVPATH, SAM_IRQ_TC2);
#endif
#if defined(CONFIG_SAM34_TC3)
tcvdbg("Initializing %s...\n", CONFIG_TIMER3_DEVPATH);
sam_tcinitialize(CONFIG_TIMER3_DEVPATH, SAM_IRQ_TC3);
#endif
#if defined(CONFIG_SAM34_TC4)
tcvdbg("Initializing %s...\n", CONFIG_TIMER4_DEVPATH);
sam_tcinitialize(CONFIG_TIMER4_DEVPATH, SAM_IRQ_TC4);
#endif
#if defined(CONFIG_SAM34_TC5)
tcvdbg("Initializing %s...\n", CONFIG_TIMER5_DEVPATH);
sam_tcinitialize(CONFIG_TIMER5_DEVPATH, SAM_IRQ_TC5);
#endif
/* Open the timer device */
tcvdbg("Opening.\n");
fd = open(CONFIG_TIMER0_DEVPATH, O_RDONLY);
if (fd < 0)
{
tcdbg("open %s failed: %d\n", CONFIG_TIMER0_DEVPATH, errno);
goto errout;
}
/* Set the timeout */
tcvdbg("Timeout = %d.\n", TINTERVAL);
ret = ioctl(fd, TCIOC_SETTIMEOUT, (unsigned long)TINTERVAL);
if (ret < 0)
{
tcdbg("ioctl(TCIOC_SETTIMEOUT) failed: %d\n", errno);
goto errout_with_dev;
}
/* Start the timer */
tcvdbg("Starting.\n");
ret = ioctl(fd, TCIOC_START, 0);
if (ret < 0)
{
tcdbg("ioctl(TCIOC_START) failed: %d\n", errno);
goto errout_with_dev;
}
return OK;
errout_with_dev:
close(fd);
errout:
return ERROR;
}
#endif /* CONFIG_TIMER */
