85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/****************************************************************************
|
|
* boards/arm/lpc17xx_40xx/zkit-arm-1769/src/lpc17_40_dac.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 <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/analog/dac.h>
|
|
#include <arch/board/board.h>
|
|
|
|
#include "arm_internal.h"
|
|
#include "zkit-arm-1769.h"
|
|
#include "lpc17_40_dac.h"
|
|
|
|
#ifdef CONFIG_DAC
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: dac_devinit
|
|
*
|
|
* Description:
|
|
* All LPC17xx/LPC40xx 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_40_dacinitialize() to get an instance of the dac
|
|
* interface
|
|
*/
|
|
|
|
dac = lpc17_40_dacinitialize();
|
|
if (dac == NULL)
|
|
{
|
|
aerr("ERROR: Failed to get dac interface\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = dac_register("/dev/dac0", dac);
|
|
if (ret < 0)
|
|
{
|
|
aerr("ERROR: dac_register failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
initialized = true;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
#endif /* CONFIG_DAC */
|