493b8de938
This reverts commit f735584514.
These header changes introduce unacceptable errors:
1. The changes alter the width of the initial block comment. That will cause nxstyle failures on most of the files.
2. The third line of the header is an (optional) short description of content of the the file. This change erroneously removes that line.
Automated header file changes can screw up a lot of files, very quickly.
163 lines
5.4 KiB
C
163 lines
5.4 KiB
C
/****************************************************************************
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* boards/arm/sama5/sama5d3-xplained/src/sam_pwm.c
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*
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* Copyright (C) 2014-2016 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 <sys/types.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/board.h>
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#include <nuttx/timers/pwm.h>
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#include <arch/board/board.h>
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#include "sam_pwm.h"
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#include "sama5d3-xplained.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* PWM.
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* There are no dedicated PWM output pins available to the user for PWM
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* testing.
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* Care must be taken because all PWM output pins conflict with some other
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* usage of the pin by other devices:
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*
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* -----+---+---+----+--------------------
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* PWM PIN PER PIO CONFLICTS
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* -----+---+---+----+--------------------
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* PWM0 FI B PC28 SPI1, ISI
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* H B PB0 GMAC
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* B PA20 LCDC, ISI
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* L B PB1 GMAC
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* B PA21 LCDC, ISI
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* -----+---+---+----+--------------------
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* PWM1 FI B PC31 HDMI
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* H B PB4 GMAC
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* B PA22 LCDC, ISI
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* L B PB5 GMAC
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* B PE31 ISI, HDMI
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* B PA23 LCDC, ISI
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* -----+---+---+----+--------------------
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* PWM2 FI B PC29 UART0, ISI, HDMI
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* H C PD5 HSMCI0
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* B PB8 GMAC
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* L C PD6 HSMCI0
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* B PB9 GMAC
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* -----+---+---+----+--------------------
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* PWM3 FI C PD16 SPI0, Audio
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* H C PD7 HSMCI0
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* B PB12 GMAC
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* L C PD8 HSMCI0
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* B PB13 GMAC
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* -----+---+---+----+--------------------
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*/
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#ifndef CONFIG_SAMA5D3XPLAINED_CHANNEL
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# if defined(CONFIG_SAMA5_PWM_CHAN0)
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# warning Assuming PWM channel 0
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# define CONFIG_SAMA5D3XPLAINED_CHANNEL 0
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# elif defined(CONFIG_SAMA5_PWM_CHAN1)
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# warning Assuming PWM channel 1
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# define CONFIG_SAMA5D3XPLAINED_CHANNEL 1
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# elif defined(CONFIG_SAMA5_PWM_CHAN2)
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# warning Assuming PWM channel 2
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# define CONFIG_SAMA5D3XPLAINED_CHANNEL 2
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# elif defined(CONFIG_SAMA5_PWM_CHAN3)
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# warning Assuming PWM channel 3
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# define CONFIG_SAMA5D3XPLAINED_CHANNEL 3
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# endif
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#endif
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#if defined(CONFIG_PWM) && defined(CONFIG_SAMA5_PWM)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sam_pwm_setup
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*
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* Description:
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* Initialize PWM and register the PWM device.
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*
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****************************************************************************/
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int sam_pwm_setup(void)
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{
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static bool initialized = false;
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struct pwm_lowerhalf_s *pwm;
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int ret;
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/* Have we already initialized? */
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if (!initialized)
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{
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/* Call sam_pwminitialize() to get an instance of the PWM interface */
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pwm = sam_pwminitialize(CONFIG_SAMA5D3XPLAINED_CHANNEL);
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if (!pwm)
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{
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_err("ERROR: Failed to get the SAMA5 PWM lower half\n");
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return -ENODEV;
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}
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/* Register the PWM driver at "/dev/pwm0" */
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ret = pwm_register("/dev/pwm0", pwm);
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if (ret < 0)
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{
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aerr("ERROR: pwm_register failed: %d\n", ret);
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return 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 OK;
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}
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#endif /* CONFIG_PWM */
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