104 lines
3.7 KiB
C
104 lines
3.7 KiB
C
/****************************************************************************
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* config/tm4c123g-launchpad/src/tm4c_timer.c
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* With modifications from Calvin Maguranis
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <debug.h>
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#include "tiva_timer.h"
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#include "tm4c123g-launchpad.h"
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#ifdef CONFIG_TIVA_TIMER
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifndef CONFIG_TIVA_TIMER32_PERIODIC
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# error CONFIG_TIVA_TIMER32_PERIODIC is not defined
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: tiva_timer_configure
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*
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* Description:
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* Configure the timer driver for the timer example application.
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*
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****************************************************************************/
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int tiva_timer_configure(void)
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{
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static bool initialized = false;
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int ret = OK;
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/* Check if we have already initialized */
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if (!initialized)
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{
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struct tiva_gptm32config_s timer_config;
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timer_config.cmn.gptm = 0;
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timer_config.cmn.mode = TIMER32_MODE_PERIODIC;
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timer_config.cmn.alternate = false;
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timer_config.config.flags = TIMER_FLAG_COUNTUP;
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timer_config.config.handler = 0;
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timer_config.config.arg = 0;
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ret = tiva_timer_initialize(CONFIG_EXAMPLE_TIMER_DEVNAME, &timer_config);
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if (ret < 0)
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{
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syslog(LOG_ERR, "ERROR: Failed to register timer driver: %d\n", ret);
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}
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/* now we are initialized */
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initialized = true;
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}
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return ret;
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}
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#endif /* CONFIG_TIVA_TIMER */
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