6a3c2aded6
* Simplify EINTR/ECANCEL error handling 1. Add semaphore uninterruptible wait function 2 .Replace semaphore wait loop with a single uninterruptible wait 3. Replace all sem_xxx to nxsem_xxx * Unify the void cast usage 1. Remove void cast for function because many place ignore the returned value witout cast 2. Replace void cast for variable with UNUSED macro
291 lines
9.0 KiB
C
291 lines
9.0 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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#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 <semaphore.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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#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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* ad_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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* ad_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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* ad_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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* ad_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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