298 lines
9.3 KiB
C
298 lines
9.3 KiB
C
/****************************************************************************
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* arch/drivers/analog/ad5410.c
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*
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* Copyright (C) 2010, 2016 Gregory Nutt. All rights reserved.
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* Copyright (C) 2011 Li Zhuoyi. All rights reserved.
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* Author: Li Zhuoyi <lzyy.cn@gmail.com>
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* Gregory Nutt <gnutt@nuttx.org>
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*
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* This file is a part of NuttX:
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*
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* Copyright (C) 2010 Gregory Nutt. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <debug.h>
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#include <arch/board/board.h>
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#include <nuttx/arch.h>
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#include <nuttx/analog/dac.h>
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#include <nuttx/spi/spi.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#if defined(CONFIG_DAC_AD5410)
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#define AD5410_REG_NOP 0x00
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#define AD5410_REG_WR 0x01
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#define AD5410_REG_RD 0x02
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#define AD5410_REG_CMD 0x55
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#define AD5410_REG_RST 0x56
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#define AD5410_CMD_REXT (1<<13)
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#define AD5410_CMD_OUTEN (1<<12)
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#define AD5410_CMD_SRCLK(x) (x<<8)
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#define AD5410_CMD_SRSTEP(x) (x<<5)
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#define AD5410_CMD_SREN (1<<4)
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#define AD5410_CMD_DCEN (1<<3)
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#define AD5410_CMD_420MA 0x05
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#define AD5410_CMD_020MA 0x06
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#define AD5410_CMD_024MA 0x07
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct up_dev_s
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{
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int devno;
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FAR struct spi_dev_s *spi; /* Cached SPI device reference */
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static void dac_lock(FAR struct spi_dev_s *spi);
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static void dac_unlock(FAR struct spi_dev_s *spi);
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/* DAC methods */
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static void dac_reset(FAR struct dac_dev_s *dev);
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static int dac_setup(FAR struct dac_dev_s *dev);
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static void dac_shutdown(FAR struct dac_dev_s *dev);
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static void dac_txint(FAR struct dac_dev_s *dev, bool enable);
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static int dac_send(FAR struct dac_dev_s *dev, FAR struct dac_msg_s *msg);
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static int dac_ioctl(FAR struct dac_dev_s *dev, int cmd, unsigned long arg);
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static int dac_interrupt(int irq, void *context, FAR void *arg);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const struct dac_ops_s g_dacops =
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{
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.ao_reset = dac_reset,
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.ao_setup = dac_setup,
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.ao_shutdown = dac_shutdown,
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.ao_txint = dac_txint,
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.ao_send = dac_send,
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.ao_ioctl = dac_ioctl,
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};
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static struct up_dev_s g_dacpriv;
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static struct dac_dev_s g_dacdev =
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{
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.ad_ops = &g_dacops,
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.ad_priv = &g_dacpriv,
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: dac_lock
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*
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* Description:
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* Lock and configure the SPI bus.
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*
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****************************************************************************/
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static void dac_lock(FAR struct spi_dev_s *spi)
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{
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SPI_LOCK(spi, true);
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SPI_SETMODE(spi, SPIDEV_MODE0);
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SPI_SETBITS(spi, 8);
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SPI_HWFEATURES(spi, 0);
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SPI_SETFREQUENCY(spi, 400000);
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}
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/****************************************************************************
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* Name: dac_unlock
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*
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* Description:
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* Unlock the SPI bus.
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*
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****************************************************************************/
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static void dac_unlock(FAR struct spi_dev_s *spi)
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{
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SPI_LOCK(spi, false);
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}
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/****************************************************************************
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* Name: dac_reset
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*
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* Description:
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* Reset the DAC device. Called early to initialize the hardware. This
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* is called, before ao_setup() and on error conditions.
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*
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****************************************************************************/
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static void dac_reset(FAR struct dac_dev_s *dev)
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{
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}
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/****************************************************************************
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* Name: dac_setup
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*
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* Description:
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* Configure the DAC. This method is called the first time that the DAC
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* device is opened. This will occur when the port is first opened.
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* This setup includes configuring and attaching DAC interrupts. Interrupts
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* are all disabled upon return.
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*
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****************************************************************************/
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static int dac_setup(FAR struct dac_dev_s *dev)
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{
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FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv;
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FAR struct spi_dev_s *spi = priv->spi;
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dac_lock(spi);
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SPI_SELECT(spi, priv->devno, true);
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SPI_SEND(spi, AD5410_REG_CMD);
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SPI_SEND(spi, (AD5410_CMD_OUTEN | AD5410_CMD_420MA) >> 8);
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SPI_SEND(spi, AD5410_CMD_OUTEN | AD5410_CMD_420MA);
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SPI_SELECT(spi, priv->devno, false);
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dac_unlock(spi);
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return OK;
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}
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/****************************************************************************
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* Name: dac_shutdown
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*
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* Description:
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* Disable the DAC. This method is called when the DAC device is closed.
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* This method reverses the operation the setup method.
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*
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****************************************************************************/
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static void dac_shutdown(FAR struct dac_dev_s *dev)
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{
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}
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/****************************************************************************
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* Name: dac_txint
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*
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* Description:
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* Call to enable or disable TX interrupts
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*
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****************************************************************************/
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static void dac_txint(FAR struct dac_dev_s *dev, bool enable)
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{
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}
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/****************************************************************************
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* Name: dac_send
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*
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* Description:
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*
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****************************************************************************/
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static int dac_send(FAR struct dac_dev_s *dev, FAR struct dac_msg_s *msg)
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{
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FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv;
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FAR struct spi_dev_s *spi = priv->spi;
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dac_lock(spi);
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SPI_SELECT(spi, priv->devno, true);
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SPI_SEND(spi, AD5410_REG_WR);
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SPI_SEND(spi, (uint8_t)(msg->am_data >> 24));
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SPI_SEND(spi, (uint8_t)(msg->am_data >> 16));
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SPI_SELECT(spi, priv->devno, false);
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dac_unlock(spi);
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dac_txdone(&g_dacdev);
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return 0;
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}
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/****************************************************************************
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* Name: dac_ioctl
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*
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* Description:
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* All ioctl calls will be routed through this method
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*
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****************************************************************************/
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static int dac_ioctl(FAR struct dac_dev_s *dev, int cmd, unsigned long arg)
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{
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_err("ERROR: Fix me; Not Implemented\n");
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return 0;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_ad5410cinitialize
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*
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* Description:
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* Initialize the selected DAC port
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*
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* Input Parameters:
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* Port number (for hardware that has multiple DAC interfaces)
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*
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* Returned Value:
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* Valid ad5410 device structure reference on success; a NULL on failure
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*
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****************************************************************************/
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FAR struct dac_dev_s *up_ad5410initialize(FAR struct spi_dev_s *spi,
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unsigned int devno)
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{
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FAR struct up_dev_s *priv = (FAR struct up_dev_s *)g_dacdev.ad_priv;
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priv->spi = spi;
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priv->devno = devno;
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return &g_dacdev;
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}
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#endif
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