283 lines
9.0 KiB
C
283 lines
9.0 KiB
C
/****************************************************************************
|
|
* drivers/analog/dac7571.c
|
|
*
|
|
* Copyright (C) 2010, 2016, 2018 Gregory Nutt. All rights reserved.
|
|
* Copyright (C) 2018 Daniel P. Carvalho. All rights reserved.
|
|
* Author: Daniel P. Carvalho <danieloak@gmail.com>
|
|
*
|
|
* 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 <assert.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/arch.h>
|
|
#include <nuttx/analog/dac.h>
|
|
#include <nuttx/i2c/i2c_master.h>
|
|
|
|
/****************************************************************************
|
|
* Preprocessor definitions
|
|
****************************************************************************/
|
|
|
|
#if !defined(CONFIG_I2C)
|
|
# error I2C Support Required.
|
|
#endif
|
|
|
|
#if defined(CONFIG_DAC7571)
|
|
|
|
/* Operating modes - not controllable by user */
|
|
|
|
#define DAC7571_CONFIG_OPMODE_SHIFT 4
|
|
#define DAC7571_CONFIG_OPMODE_MASK (0x0F << DAC7571_CONFIG_OPMODE_SHIFT)
|
|
#define DAC7571_CONFIG_OPMODE_NORMAL (0 << DAC7571_CONFIG_OPMODE_SHIFT)
|
|
#define DAC7571_CONFIG_OPMODE_1K_PWD (1 << DAC7571_CONFIG_OPMODE_SHIFT)
|
|
#define DAC7571_CONFIG_OPMODE_100K_PWD (2 << DAC7571_CONFIG_OPMODE_SHIFT)
|
|
#define DAC7571_CONFIG_OPMODE_HZ_PWD (3 << DAC7571_CONFIG_OPMODE_SHIFT)
|
|
|
|
#ifndef CONFIG_DAC7571_I2C_FREQUENCY
|
|
# define CONFIG_DAC7571_I2C_FREQUENCY 400000
|
|
#endif
|
|
|
|
#define I2C_NOSTARTSTOP_MSGS 2
|
|
#define I2C_NOSTARTSTOP_ADDRESS_MSG_INDEX 0
|
|
#define I2C_NOSTARTSTOP_DATA_MSG_INDEX 1
|
|
|
|
/****************************************************************************
|
|
* Private Types
|
|
****************************************************************************/
|
|
|
|
struct dac7571_dev_s
|
|
{
|
|
FAR struct i2c_master_s *i2c; /* I2C interface */
|
|
uint8_t addr; /* I2C address */
|
|
uint16_t state; /* DAC7571 current state */
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Private Function Prototypes
|
|
****************************************************************************/
|
|
|
|
/* I2C Helpers */
|
|
|
|
/* DAC methods */
|
|
|
|
static void dac7571_reset(FAR struct dac_dev_s *dev);
|
|
static int dac7571_setup(FAR struct dac_dev_s *dev);
|
|
static void dac7571_shutdown(FAR struct dac_dev_s *dev);
|
|
static void dac7571_txint(FAR struct dac_dev_s *dev, bool enable);
|
|
static int dac7571_send(FAR struct dac_dev_s *dev,
|
|
FAR struct dac_msg_s *msg);
|
|
static int dac7571_ioctl(FAR struct dac_dev_s *dev, int cmd,
|
|
unsigned long arg);
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
static struct dac7571_dev_s g_dacpriv;
|
|
|
|
static const struct dac_ops_s g_dacops =
|
|
{
|
|
.ao_reset = dac7571_reset,
|
|
.ao_setup = dac7571_setup,
|
|
.ao_shutdown = dac7571_shutdown,
|
|
.ao_txint = dac7571_txint,
|
|
.ao_send = dac7571_send,
|
|
.ao_ioctl = dac7571_ioctl,
|
|
};
|
|
|
|
static struct dac_dev_s g_dacdev =
|
|
{
|
|
.ad_ops = &g_dacops,
|
|
.ad_priv = &g_dacpriv,
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: dac7571_reset
|
|
*
|
|
* Description:
|
|
* Reset the DAC device. Called early to initialize the hardware. This
|
|
* is called, before ao_setup() and on error conditions.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void dac7571_reset(FAR struct dac_dev_s *dev)
|
|
{
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: dac7571_setup
|
|
*
|
|
* Description:
|
|
* 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 dac7571_setup(FAR struct dac_dev_s *dev)
|
|
{
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: dac7571_shutdown
|
|
*
|
|
* Description:
|
|
* Disable the DAC. This method is called when the DAC device is closed.
|
|
* This method reverses the operation the setup method.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void dac7571_shutdown(FAR struct dac_dev_s *dev)
|
|
{
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: dac7571_txint
|
|
*
|
|
* Description:
|
|
* Call to enable or disable TX interrupts
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void dac7571_txint(FAR struct dac_dev_s *dev, bool enable)
|
|
{
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: dac7571_send
|
|
****************************************************************************/
|
|
|
|
static int dac7571_send(FAR struct dac_dev_s *dev, FAR struct dac_msg_s *msg)
|
|
{
|
|
FAR struct dac7571_dev_s *priv = (FAR struct dac7571_dev_s *)dev->ad_priv;
|
|
struct i2c_config_s config;
|
|
int ret;
|
|
|
|
/* Sanity check */
|
|
|
|
DEBUGASSERT(priv->i2c != NULL);
|
|
|
|
/* Set up message to send */
|
|
|
|
ainfo("value: %08x\n", msg->am_data);
|
|
|
|
uint8_t const BUFFER_SIZE = 2;
|
|
uint8_t buffer[BUFFER_SIZE];
|
|
|
|
buffer[0] = (uint8_t)(msg->am_data >> 8);
|
|
buffer[0] &= ~(DAC7571_CONFIG_OPMODE_MASK); /* only normal op mode supported */
|
|
buffer[1] = (uint8_t)(msg->am_data);
|
|
|
|
/* Set up the I2C configuration */
|
|
|
|
config.frequency = CONFIG_DAC7571_I2C_FREQUENCY;
|
|
config.address = priv->addr;
|
|
config.addrlen = 7;
|
|
|
|
/* Then perform the transfer. */
|
|
|
|
ret = i2c_write(priv->i2c, &config, buffer, BUFFER_SIZE);
|
|
if (ret < 0)
|
|
{
|
|
aerr("ERROR: dac7571_send failed code:%d\n", ret);
|
|
}
|
|
|
|
dac_txdone(&g_dacdev);
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: dac7571_ioctl
|
|
****************************************************************************/
|
|
|
|
static int dac7571_ioctl(FAR struct dac_dev_s *dev, int cmd,
|
|
unsigned long arg)
|
|
{
|
|
return -ENOTTY;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: dac7571_initialize
|
|
*
|
|
* Description:
|
|
* Initialize DAC
|
|
*
|
|
* Input Parameters:
|
|
* Port number (for hardware that has multiple DAC interfaces)
|
|
*
|
|
* Returned Value:
|
|
* Valid DAC7571 device structure reference on success; a NULL on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct dac_dev_s *dac7571_initialize(FAR struct i2c_master_s *i2c,
|
|
uint8_t addr)
|
|
{
|
|
FAR struct dac7571_dev_s *priv;
|
|
|
|
/* Sanity check */
|
|
|
|
DEBUGASSERT(i2c != NULL);
|
|
|
|
/* Initialize the DAC7571 device structure */
|
|
|
|
priv = (FAR struct dac7571_dev_s *)g_dacdev.ad_priv;
|
|
priv->i2c = i2c;
|
|
priv->addr = addr;
|
|
return &g_dacdev;
|
|
}
|
|
|
|
#endif /* CONFIG_DAC7571 */
|