124 lines
4.0 KiB
C
124 lines
4.0 KiB
C
/************************************************************************************
|
|
* configs/same70-xplained/src/sam_dac.c
|
|
*
|
|
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* 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 <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <debug.h>
|
|
#include <errno.h>
|
|
|
|
#include <arch/board/board.h>
|
|
|
|
#include "up_arch.h"
|
|
#include "chip.h"
|
|
#include "sam_dac.h"
|
|
#include "same70-xplained.h"
|
|
|
|
#if defined(CONFIG_SAMV7_DAC0) || defined(CONFIG_SAMV7_DAC1)
|
|
|
|
/************************************************************************************
|
|
* Public Functions
|
|
************************************************************************************/
|
|
|
|
/************************************************************************************
|
|
* Name: sam_dacdev_initialize
|
|
*
|
|
* Description:
|
|
* Called to configure DAC peripheral module and register DAC device driver
|
|
************************************************************************************/
|
|
|
|
int sam_dacdev_initialize(void)
|
|
{
|
|
static bool initialized = false;
|
|
struct dac_dev_s *dac;
|
|
int ret;
|
|
|
|
/* Check if we have already initialized */
|
|
|
|
if (!initialized)
|
|
{
|
|
#ifdef CONFIG_SAMV7_DAC0
|
|
/* Get an instance of the DAC0 interface */
|
|
|
|
dac = sam_dac_initialize(0);
|
|
if (dac == NULL)
|
|
{
|
|
aerr("ERROR: Failed to get DAC0 interface\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Register the DAC driver at "/dev/dac0" */
|
|
|
|
ret = dac_register("/dev/dac0", dac);
|
|
if (ret < 0)
|
|
{
|
|
aerr("ERROR: dac_register failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_SAMV7_DAC1
|
|
/* Get an instance of the DAC1 interface */
|
|
|
|
dac = sam_dac_initialize(1);
|
|
if (dac == NULL)
|
|
{
|
|
aerr("ERROR: Failed to get DAC1 interface\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Register the DAC driver at "/dev/dac1" */
|
|
|
|
ret = dac_register("/dev/dac1", dac);
|
|
if (ret < 0)
|
|
{
|
|
aerr("ERROR: dac_register failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
#endif
|
|
/* Now we are initialized */
|
|
|
|
initialized = true;
|
|
}
|
|
return OK;
|
|
}
|
|
|
|
#endif /* CONFIG_SAMV7_DAC0 || CONFIG_SAMV7_DAC1 */
|