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/************************************************************************************
* arch/arm/src/lpc17xx/lpc17_dac.c
*
* Copyright (C) 2011 Li Zhuoyi. All rights reserved.
* Author: Li Zhuoyi <lzyy.cn@gmail.com>
* History: 0.1 2011-08-05 initial version
*
* This file is a part of NuttX:
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
*
* 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 <stdio.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <semaphore.h>
#include <errno.h>
#include <debug.h>
#include <arch/board/board.h>
#include <nuttx/arch.h>
#include <nuttx/analog/dac.h>
#include "up_internal.h"
#include "up_arch.h"
#include "chip.h"
#include "lpc17_internal.h"
#include "lpc17_syscon.h"
#include "lpc17_pinconn.h"
#include "lpc17_dac.h"
#ifdef CONFIG_LPC17_DAC
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* DAC methods */
static void dac_reset(FAR struct dac_dev_s *dev);
static int dac_setup(FAR struct dac_dev_s *dev);
static void dac_shutdown(FAR struct dac_dev_s *dev);
static void dac_txint(FAR struct dac_dev_s *dev, bool enable);
static int dac_send(FAR struct dac_dev_s *dev, FAR struct dac_msg_s *msg);
static int dac_ioctl(FAR struct dac_dev_s *dev, int cmd, unsigned long arg);
static int dac_interrupt(int irq, void *context);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct dac_ops_s g_dacops =
{
.ao_reset =dac_reset,
.ao_setup = dac_setup,
.ao_shutdown = dac_shutdown,
.ao_txint = dac_txint,
.ao_send = dac_send,
.ao_ioctl = dac_ioctl,
};
static struct dac_dev_s g_dacdev =
{
.ad_ops = &g_dacops,
};
/****************************************************************************
* Private Functions
****************************************************************************/
/* Reset the DAC device. Called early to initialize the hardware. This
* is called, before ao_setup() and on error conditions.
*/
static void dac_reset(FAR struct dac_dev_s *dev)
{
irqstate_t flags;
uint32_t regval;
flags = irqsave();
regval = getreg32(LPC17_SYSCON_PCLKSEL0);
regval &= ~SYSCON_PCLKSEL0_DAC_MASK;
regval |= (SYSCON_PCLKSEL_CCLK8 << SYSCON_PCLKSEL0_DAC_SHIFT);
putreg32(regval, LPC17_SYSCON_PCLKSEL0);
//putreg32(DAC_CTRL_DBLBUFEN,LPC17_DAC_CTRL); ?
lpc17_configgpio(GPIO_AOUT);
irqrestore(flags);
}
/* Configure the DAC. This method is called the first time that the DAC
* device is opened. This will occur when the port is first opened.
* This setup includes configuring and attaching DAC interrupts. Interrupts
* are all disabled upon return.
*/
static int dac_setup(FAR struct dac_dev_s *dev)
{
return OK;
}
/* Disable the DAC. This method is called when the DAC device is closed.
* This method reverses the operation the setup method.
*/
static void dac_shutdown(FAR struct dac_dev_s *dev)
{
}
/* Call to enable or disable TX interrupts */
static void dac_txint(FAR struct dac_dev_s *dev, bool enable)
{
}
static int dac_send(FAR struct dac_dev_s *dev, FAR struct dac_msg_s *msg)
{
putreg32((msg->am_data>>16)&0xfffff,LPC17_DAC_CR);
dac_txdone(&g_dacdev);
return 0;
}
/* All ioctl calls will be routed through this method */
static int dac_ioctl(FAR struct dac_dev_s *dev, int cmd, unsigned long arg)
{
dbg("Fix me:Not Implemented\n");
return 0;
}
static int dac_interrupt(int irq, void *context)
{
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: lpc17_dacinitialize
*
* Description:
* Initialize the DAC
*
* Returned Value:
* Valid dac device structure reference on succcess; a NULL on failure
*
****************************************************************************/
FAR struct dac_dev_s *lpc17_dacinitialize(void)
{
return &g_dacdev;
}
#endif /* CONFIG_LPC17_DAC */
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