/************************************************************************************
* arch/drivers/analog/ad5410.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.
*
************************************************************************************/
#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 <nuttx/spi/spi.h>
#if defined(CONFIG_DAC_AD5410)
#define AD5410_REG_NOP 0x00
#define AD5410_REG_WR 0x01
#define AD5410_REG_RD 0x02
#define AD5410_REG_CMD 0x55
#define AD5410_REG_RST 0x56
#define AD5410_CMD_REXT (1<<13)
#define AD5410_CMD_OUTEN (1<<12)
#define AD5410_CMD_SRCLK(x) (x<<8)
#define AD5410_CMD_SRSTEP(x) (x<<5)
#define AD5410_CMD_SREN (1<<4)
#define AD5410_CMD_DCEN (1<<3)
#define AD5410_CMD_420MA 0x05
#define AD5410_CMD_020MA 0x06
#define AD5410_CMD_024MA 0x07
/****************************************************************************
* ad_private Types
****************************************************************************/
struct up_dev_s
{
int devno;
FAR struct spi_dev_s *spi; /* Cached SPI device reference */
};
/****************************************************************************
* ad_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);
/****************************************************************************
* ad_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 up_dev_s g_dacpriv;
static struct dac_dev_s g_dacdev =
{
.ad_ops = &g_dacops,
.ad_priv= &g_dacpriv,
};
/****************************************************************************
* ad_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)
{
}
/* 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)
{
FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv;
FAR struct spi_dev_s *spi = priv->spi;
SPI_SELECT(spi, priv->devno, true);
SPI_SEND(spi,AD5410_REG_CMD);
SPI_SEND(spi,(AD5410_CMD_OUTEN|AD5410_CMD_420MA)>>8);
SPI_SEND(spi,AD5410_CMD_OUTEN|AD5410_CMD_420MA);
SPI_SELECT(spi, priv->devno, false);
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)
{
FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv;
FAR struct spi_dev_s *spi = priv->spi;
SPI_SELECT(spi, priv->devno, true);
SPI_SEND(spi,AD5410_REG_WR);
SPI_SEND(spi,(uint8_t)(msg->am_data>>24));
SPI_SEND(spi,(uint8_t)(msg->am_data>>16));
SPI_SELECT(spi, priv->devno, false);
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;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_ad5410cinitialize
*
* Description:
* Initialize the selected DAC port
*
* Input Parameter:
* Port number (for hardware that has mutiple DAC interfaces)
*
* Returned Value:
* Valid ad5410 device structure reference on succcess; a NULL on failure
*
****************************************************************************/
FAR struct dac_dev_s *up_ad5410initialize(FAR struct spi_dev_s *spi, unsigned int devno)
{
FAR struct up_dev_s *priv = (FAR struct up_dev_s *)g_dacdev.ad_priv;
priv->spi=spi;
priv->devno=devno;
return &g_dacdev;
}
#endif
