40cd67eee6
Gregory Nutt has submitted the SGA and we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
148 lines
4.6 KiB
C
148 lines
4.6 KiB
C
/****************************************************************************
|
|
* boards/arm/sama5/sama5d3-xplained/src/sam_pwm.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/board.h>
|
|
#include <nuttx/timers/pwm.h>
|
|
|
|
#include <arch/board/board.h>
|
|
|
|
#include "sam_pwm.h"
|
|
#include "sama5d3-xplained.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* Configuration ************************************************************/
|
|
|
|
/* PWM.
|
|
* There are no dedicated PWM output pins available to the user for PWM
|
|
* testing.
|
|
* Care must be taken because all PWM output pins conflict with some other
|
|
* usage of the pin by other devices:
|
|
*
|
|
* -----+---+---+----+--------------------
|
|
* PWM PIN PER PIO CONFLICTS
|
|
* -----+---+---+----+--------------------
|
|
* PWM0 FI B PC28 SPI1, ISI
|
|
* H B PB0 GMAC
|
|
* B PA20 LCDC, ISI
|
|
* L B PB1 GMAC
|
|
* B PA21 LCDC, ISI
|
|
* -----+---+---+----+--------------------
|
|
* PWM1 FI B PC31 HDMI
|
|
* H B PB4 GMAC
|
|
* B PA22 LCDC, ISI
|
|
* L B PB5 GMAC
|
|
* B PE31 ISI, HDMI
|
|
* B PA23 LCDC, ISI
|
|
* -----+---+---+----+--------------------
|
|
* PWM2 FI B PC29 UART0, ISI, HDMI
|
|
* H C PD5 HSMCI0
|
|
* B PB8 GMAC
|
|
* L C PD6 HSMCI0
|
|
* B PB9 GMAC
|
|
* -----+---+---+----+--------------------
|
|
* PWM3 FI C PD16 SPI0, Audio
|
|
* H C PD7 HSMCI0
|
|
* B PB12 GMAC
|
|
* L C PD8 HSMCI0
|
|
* B PB13 GMAC
|
|
* -----+---+---+----+--------------------
|
|
*/
|
|
|
|
#ifndef CONFIG_SAMA5D3XPLAINED_CHANNEL
|
|
# if defined(CONFIG_SAMA5_PWM_CHAN0)
|
|
# warning Assuming PWM channel 0
|
|
# define CONFIG_SAMA5D3XPLAINED_CHANNEL 0
|
|
# elif defined(CONFIG_SAMA5_PWM_CHAN1)
|
|
# warning Assuming PWM channel 1
|
|
# define CONFIG_SAMA5D3XPLAINED_CHANNEL 1
|
|
# elif defined(CONFIG_SAMA5_PWM_CHAN2)
|
|
# warning Assuming PWM channel 2
|
|
# define CONFIG_SAMA5D3XPLAINED_CHANNEL 2
|
|
# elif defined(CONFIG_SAMA5_PWM_CHAN3)
|
|
# warning Assuming PWM channel 3
|
|
# define CONFIG_SAMA5D3XPLAINED_CHANNEL 3
|
|
# endif
|
|
#endif
|
|
|
|
#if defined(CONFIG_PWM) && defined(CONFIG_SAMA5_PWM)
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: sam_pwm_setup
|
|
*
|
|
* Description:
|
|
* Initialize PWM and register the PWM device.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int sam_pwm_setup(void)
|
|
{
|
|
static bool initialized = false;
|
|
struct pwm_lowerhalf_s *pwm;
|
|
int ret;
|
|
|
|
/* Have we already initialized? */
|
|
|
|
if (!initialized)
|
|
{
|
|
/* Call sam_pwminitialize() to get an instance of the PWM interface */
|
|
|
|
pwm = sam_pwminitialize(CONFIG_SAMA5D3XPLAINED_CHANNEL);
|
|
if (!pwm)
|
|
{
|
|
_err("ERROR: Failed to get the SAMA5 PWM lower half\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Register the PWM driver at "/dev/pwm0" */
|
|
|
|
ret = pwm_register("/dev/pwm0", pwm);
|
|
if (ret < 0)
|
|
{
|
|
aerr("ERROR: pwm_register failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Now we are initialized */
|
|
|
|
initialized = true;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
#endif /* CONFIG_PWM */
|