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/****************************************************************************
* config/dk-tm4c129x/src/tm4c_timer.c
*
* Copyright (C) 2015 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 <debug.h>
#include "tiva_timer.h"
#include "dk-tm4c129x.h"
#ifdef CONFIG_DK_TM4C129X_TIMER
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_TIMER
# error CONFIG_TIMER is not defined
#endif
#ifndef CONFIG_TIVA_TIMER32_PERIODIC
# error CONFIG_TIVA_TIMER32_PERIODIC is not defined
#endif
#if defined(CONFIG_DK_TM4C129X_TIMER0)
# define GPTM 0
#elif defined(CONFIG_DK_TM4C129X_TIMER1)
# define GPTM 1
#elif defined(CONFIG_DK_TM4C129X_TIMER2)
# define GPTM 2
#elif defined(CONFIG_DK_TM4C129X_TIMER3)
# define GPTM 3
#elif defined(CONFIG_DK_TM4C129X_TIMER4)
# define GPTM 4
#elif defined(CONFIG_DK_TM4C129X_TIMER5)
# define GPTM 5
#elif defined(CONFIG_DK_TM4C129X_TIMER6)
# define GPTM 6
#elif defined(CONFIG_DK_TM4C129X_TIMER7)
# define GPTM 7
#else
# error No CONFIG_DK_TM4C129X_TIMERn definition
#endif
#ifndef CONFIG_DK_TM4C129X_TIMER_DEVNAME
# define CONFIG_DK_TM4C129X_TIMER_DEVNAME "/dev/timer0"
#endif
#ifndef CONFIG_DK_TM4C129X_TIMER_TIMEOUT
# define CONFIG_DK_TM4C129X_TIMER_TIMEOUT 10000
#endif
#undef CONFIG_DK_TM4C129X_TIMER_ALTCLK
#define ALTCLK false
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: tiva_timer_initialize
*
* Description:
* Configure the timer driver
*
****************************************************************************/
int tiva_timer_initialize(void)
{
int ret;
timvdbg("Registering TIMER%d at %s\n", GPTM, CONFIG_DK_TM4C129X_TIMER_DEVNAME);
timvdbg("Initial timer period: %d uS\n", CONFIG_DK_TM4C129X_TIMER_TIMEOUT);
ret = tiva_timer_register(CONFIG_DK_TM4C129X_TIMER_DEVNAME, GPTM,
CONFIG_DK_TM4C129X_TIMER_TIMEOUT, ALTCLK);
if (ret < 0)
{
timdbg("ERROR: Failed to register timer driver: %d\n", ret);
}
return ret;
}
#endif /* CONFIG_DK_TM4C129X_TIMER */
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