116 lines
4.1 KiB
C
116 lines
4.1 KiB
C
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/****************************************************************************
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* config/tm4c1294-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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* 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 "tm4c1294-launchpad.h"
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#ifdef CONFIG_TM4C1294_LAUNCHPAD_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_TIMER
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# error CONFIG_TIMER is not defined
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#endif
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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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#if defined(CONFIG_DK_TM4CTM4C1294_LAUNCHPADX_TIMER0)
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# define GPTM 0
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#elif defined(CONFIG_TM4C1294_LAUNCHPAD_TIMER1)
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# define GPTM 1
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#elif defined(CONFIG_TM4C1294_LAUNCHPAD_TIMER2)
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# define GPTM 2
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#elif defined(CONFIG_TM4C1294_LAUNCHPAD_TIMER3)
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# define GPTM 3
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#elif defined(CONFIG_TM4C1294_LAUNCHPAD_TIMER4)
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# define GPTM 4
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#elif defined(CONFIG_TM4C1294_LAUNCHPAD_TIMER5)
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# define GPTM 5
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#elif defined(CONFIG_TM4C1294_LAUNCHPAD_TIMER6)
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# define GPTM 6
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#elif defined(CONFIG_TM4C1294_LAUNCHPAD_TIMER7)
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# define GPTM 7
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#else
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# error No CONFIG_TM4C1294_LAUNCHPAD_TIMERn definition
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#endif
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#ifndef CONFIG_TM4C1294_LAUNCHPAD_TIMER_DEVNAME
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# define CONFIG_TM4C1294_LAUNCHPAD_TIMER_DEVNAME "/dev/timer0"
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#endif
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#undef CONFIG_TM4C1294_LAUNCHPAD_TIMER_ALTCLK
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#define ALTCLK false
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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_initialize
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*
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* Description:
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* Configure the timer driver
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*
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****************************************************************************/
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int tiva_timer_initialize(void)
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{
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int ret;
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timvdbg("Registering TIMER%d at %s\n", GPTM, CONFIG_TM4C1294_LAUNCHPAD_TIMER_DEVNAME);
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ret = tiva_timer_register(CONFIG_TM4C1294_LAUNCHPAD_TIMER_DEVNAME, GPTM, ALTCLK);
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if (ret < 0)
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{
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timdbg("ERROR: Failed to register timer driver: %d\n", ret);
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}
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return ret;
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}
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#endif /* CONFIG_TM4C1294_LAUNCHPAD_TIMER */
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