101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/************************************************************************************
|
|
* configs/zkit-arm-1769/src/up_dac.c
|
|
* arch/arm/src/board/up_dac.c
|
|
*
|
|
* Copyright (C) 2013 Zilogic Systems. All rights reserved.
|
|
* Author: Kannan <code@nuttx.org>
|
|
*
|
|
* Based on configs/stm3220g-eval/src/up_dac.c
|
|
*
|
|
* Copyright (C) 2012, 2014 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 <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/analog/dac.h>
|
|
#include <arch/board/board.h>
|
|
|
|
#include "up_arch.h"
|
|
#include "up_internal.h"
|
|
|
|
#include "lpc17_dac.h"
|
|
|
|
#ifdef CONFIG_DAC
|
|
|
|
/************************************************************************************
|
|
* Name: dac_devinit
|
|
*
|
|
* Description:
|
|
* All LPC17xx architectures must provide the following interface to work with
|
|
* examples/diag.
|
|
*
|
|
************************************************************************************/
|
|
|
|
int dac_devinit(void)
|
|
{
|
|
static bool initialized = false;
|
|
struct dac_dev_s *dac;
|
|
int ret;
|
|
|
|
if (!initialized)
|
|
{
|
|
/* Call lpc17_dacinitialize() to get an instance of the dac interface */
|
|
|
|
dac = lpc17_dacinitialize();
|
|
if (dac == NULL)
|
|
{
|
|
adbg("ERROR: Failed to get dac interface\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = dac_register("/dev/dac0", dac);
|
|
if (ret < 0)
|
|
{
|
|
adbg("dac_register failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
initialized = true;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
#endif /* CONFIG_DAC */
|