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/****************************************************************************
* config/tm4c123g-launchpad/src/tm4c_timer.c
*
* Copyright (C) 2015 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* With modifications from Calvin Maguranis
*
* 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 "tm4c123g-launchpad.h"
#ifdef CONFIG_TIVA_TIMER
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_TIVA_TIMER32_PERIODIC
# error CONFIG_TIVA_TIMER32_PERIODIC is not defined
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: tiva_timer_initialize
*
* Description:
* Configure the timer driver for the timer example application.
*
****************************************************************************/
int tiva_timer_initialize(void)
{
static bool initialized = false;
int ret = OK;
/* Check if we have already initialized */
if (!initialized)
{
struct tiva_gptm32config_s timer_config;
timer_config.cmn.gptm = 0;
timer_config.cmn.mode = TIMER32_MODE_PERIODIC;
timer_config.cmn.alternate = false;
timer_config.config.flags = TIMER_FLAG_COUNTUP;
timer_config.config.handler = 0;
timer_config.config.arg = 0;
ret = tiva_timer_initialize(CONFIG_EXAMPLE_TIMER_DEVNAME, &timer_config);
if (ret < 0)
{
syslog(LOG_ERR, "ERROR: Failed to register timer driver: %d\n", ret);
}
/* now we are initialized */
initialized = true;
}
return ret;
}
#endif /* CONFIG_TIVA_TIMER */
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