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drivers/analog/dac7554.c: Add support to the DAC7554 digital-to-analog converter.

This commit is contained in:
Augusto Fraga Giachero 2019-08-28 07:01:17 -06:00 committed by Gregory Nutt
parent 8493312f00
commit 4710ae736c
5 changed files with 344 additions and 41 deletions
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7
drivers/analog/Kconfig
View File

@ -159,6 +159,13 @@ config DAC7571_I2C_FREQUENCY
default 400000
depends on DAC7571
config DAC7554
bool "DAC7554 support"
default n
select SPI
---help---
Enable driver support for the Texas Instruments DAC7554 dac.
endif # DAC
config OPAMP

4
drivers/analog/Make.defs
View File

@ -53,6 +53,10 @@ ifeq ($(CONFIG_DAC7571),y)
CSRCS += dac7571.c
endif
ifeq ($(CONFIG_DAC7554),y)
CSRCS += dac7554.c
endif
endif
# Check for COMP devices

280
drivers/analog/dac7554.c Normal file
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@ -0,0 +1,280 @@
/****************************************************************************
* arch/drivers/analog/dac7554.c
*
* Copyright (C) 2010, 2016, 2018 Gregory Nutt. All rights reserved.
* Copyright (C) 2018 Daniel P. Carvalho. All rights reserved.
* Copyright (C) 2019 Augusto Fraga Giachero. All rights reserved.
* Author: Augusto Fraga Giachero <afg@augustofg.net>
*
* This file is a part of NuttX:
*
* Copyright (C) 2019 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 <nuttx/kmalloc.h>
#include <nuttx/arch.h>
#include <nuttx/analog/dac.h>
#include <nuttx/spi/spi.h>
/****************************************************************************
* Preprocessor definitions
****************************************************************************/
#if !defined(CONFIG_SPI)
# error SPI Support Required.
#endif
#if defined(CONFIG_DAC7554)
#ifndef CONFIG_DAC7554_SPI_FREQUENCY
# define CONFIG_DAC7554_SPI_FREQUENCY 1000000
#endif
#define DAC7554_SPI_MODE (SPIDEV_MODE2) /* SPI Mode 2: CPOL=1,CPHA=0 */
/****************************************************************************
* Private Types
****************************************************************************/
struct dac7554_dev_s
{
FAR struct spi_dev_s *spi; /* SPI interface */
int spidev; /* SPI Chip Select number */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* I2C Helpers */
/* DAC methods */
static void dac7554_reset(FAR struct dac_dev_s *dev);
static int dac7554_setup(FAR struct dac_dev_s *dev);
static void dac7554_shutdown(FAR struct dac_dev_s *dev);
static void dac7554_txint(FAR struct dac_dev_s *dev, bool enable);
static int dac7554_send(FAR struct dac_dev_s *dev,
FAR struct dac_msg_s *msg);
static int dac7554_ioctl(FAR struct dac_dev_s *dev, int cmd,
unsigned long arg);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct dac_ops_s g_dacops =
{
.ao_reset = dac7554_reset,
.ao_setup = dac7554_setup,
.ao_shutdown = dac7554_shutdown,
.ao_txint = dac7554_txint,
.ao_send = dac7554_send,
.ao_ioctl = dac7554_ioctl,
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: dac7554_configspi
*
* Description:
* Configure the SPI interface
*
****************************************************************************/
static inline void dac7554_configspi(FAR struct spi_dev_s *spi)
{
SPI_SETMODE(spi, DAC7554_SPI_MODE);
SPI_SETBITS(spi, 8);
SPI_HWFEATURES(spi, 0);
SPI_SETFREQUENCY(spi, CONFIG_DAC7554_SPI_FREQUENCY);
}
/****************************************************************************
* Name: dac7554_reset
*
* Description:
* Reset the DAC device. Called early to initialize the hardware. This
* is called, before ao_setup() and on error conditions.
*
****************************************************************************/
static void dac7554_reset(FAR struct dac_dev_s *dev)
{
}
/****************************************************************************
* Name: dac7554_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 dac7554_setup(FAR struct dac_dev_s *dev)
{
return OK;
}
/****************************************************************************
* Name: dac7554_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 dac7554_shutdown(FAR struct dac_dev_s *dev)
{
}
/****************************************************************************
* Name: dac7554_txint
*
* Description:
* Call to enable or disable TX interrupts
*
****************************************************************************/
static void dac7554_txint(FAR struct dac_dev_s *dev, bool enable)
{
}
/****************************************************************************
* Name: dac7554_send
****************************************************************************/
static int dac7554_send(FAR struct dac_dev_s *dev, FAR struct dac_msg_s *msg)
{
FAR struct dac7554_dev_s *priv = (FAR struct dac7554_dev_s *)dev->ad_priv;
uint16_t data;
/* Sanity check */
DEBUGASSERT(priv->SPI != NULL);
/* Set up message to send */
ainfo("value: %08x\n", msg->am_data);
SPI_LOCK(priv->spi, true);
dac7554_configspi(priv->spi);
data = ((msg->am_data >> 16) & 0x0fff) | ((msg->am_channel & 0x03) << 12) |
(1 << 15);
SPI_SELECT(priv->spi, priv->spidev, true);
SPI_SEND(priv->spi, (data >> 8));
SPI_SEND(priv->spi, (data & 0xff));
SPI_SELECT(priv->spi, priv->spidev, false);
SPI_LOCK(priv->spi, false);
dac_txdone(dev);
return 0;
}
/****************************************************************************
* Name: dac7554_ioctl
****************************************************************************/
static int dac7554_ioctl(FAR struct dac_dev_s *dev, int cmd,
unsigned long arg)
{
return -ENOTTY;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: dac7554_initialize
*
* Description:
* Initialize DAC
*
* Input Parameters:
* Port number (for hardware that has multiple DAC interfaces)
*
* Returned Value:
* Valid DAC7554 device structure reference on success; a NULL on failure
*
****************************************************************************/
FAR struct dac_dev_s *dac7554_initialize(FAR struct spi_dev_s *spi,
int spidev)
{
FAR struct dac7554_dev_s *priv;
FAR struct dac_dev_s *g_dacdev;
/* Sanity check */
DEBUGASSERT(i2c != NULL);
/* Initialize the DAC7554 device structure */
priv = (FAR struct dac7554_dev_s *)kmm_malloc(sizeof(struct dac7554_dev_s));
priv->spi = spi;
priv->spidev = spidev;
g_dacdev = (FAR struct dac_dev_s *)kmm_malloc(sizeof(struct dac_dev_s));
g_dacdev->ad_ops = &g_dacops;
g_dacdev->ad_priv = priv;
return g_dacdev;
}
#endif /* CONFIG_DAC7554 */

8
drivers/analog/dac7571.c
View File

@ -106,8 +106,10 @@ 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);
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
@ -269,7 +271,7 @@ FAR struct dac_dev_s *dac7571_initialize(FAR struct i2c_master_s *i2c,
DEBUGASSERT(i2c != NULL);
/* Initialize the DAC7571 device structure */
/* Initialize the DAC7571 device structure */
priv = (FAR struct dac7571_dev_s *)g_dacdev.ad_priv;
priv->i2c = i2c;

86
include/nuttx/analog/dac.h
View File

@ -1,4 +1,4 @@
/************************************************************************************
/****************************************************************************
* include/nuttx/analog/dac.h
*
* Copyright (C) 2017, 2018 Gregory Nutt. All rights reserved.
@ -38,14 +38,14 @@
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
****************************************************************************/
#ifndef __INCLUDE_NUTTX_ANALOG_DAC_H
#define __INCLUDE_NUTTX_ANALOG_DAC_H
/************************************************************************************
/****************************************************************************
* Included Files
************************************************************************************/
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
@ -58,12 +58,13 @@
#include <nuttx/i2c/i2c_master.h>
#include <nuttx/spi/spi.h>
/************************************************************************************
/****************************************************************************
* Pre-processor Definitions
************************************************************************************/
****************************************************************************/
/* Default configuration settings that may be overridden in the board configuration.
* file. The configured size is limited to 255 to fit into a uint8_t.
/* Default configuration settings that may be overridden in the board
* configuration file. The configured size is limited to 255 to fit into a
* uint8_t.
*/
#if !defined(CONFIG_DAC_FIFOSIZE)
@ -73,9 +74,9 @@
# define CONFIG_DAC_FIFOSIZE 255
#endif
/************************************************************************************
/****************************************************************************
* Public Types
************************************************************************************/
****************************************************************************/
begin_packed_struct struct dac_msg_s
{
@ -86,15 +87,17 @@ begin_packed_struct struct dac_msg_s
struct dac_fifo_s
{
sem_t af_sem; /* Counting semaphore */
uint8_t af_head; /* Index to the head [IN] index in the circular buffer */
uint8_t af_tail; /* Index to the tail [OUT] index in the circular buffer */
uint8_t af_head; /* Index to the head [IN] index
* in the circular buffer */
uint8_t af_tail; /* Index to the tail [OUT] index
* in the circular buffer */
/* Circular buffer of DAC messages */
struct dac_msg_s af_buffer[CONFIG_DAC_FIFOSIZE];
};
/* This structure defines all of the operations providd by the architecture specific
* logic. All fields must be provided with non-NULL function pointers by the
* caller of dac_register().
/* This structure defines all of the operations providd by the architecture
* specific logic. All fields must be provided with non-NULL function
* pointers by the caller of dac_register().
*/
struct dac_dev_s;
@ -108,8 +111,8 @@ struct dac_ops_s
/* 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.
* This setup includes configuring and attaching DAC interrupts.
* Interrupts are all disabled upon return.
*/
CODE int (*ao_setup)(FAR struct dac_dev_s *dev);
@ -130,7 +133,6 @@ struct dac_ops_s
/* All ioctl calls will be routed through this method */
CODE int (*ao_ioctl)(FAR struct dac_dev_s *dev, int cmd, unsigned long arg);
};
/* This is the device structure used by the driver. The caller of
@ -144,50 +146,53 @@ struct dac_ops_s
struct dac_dev_s
{
uint8_t ad_ocount; /* The number of times the device has been opened */
uint8_t ad_ocount; /* The number of times the device has
* been opened */
uint8_t ad_nchannel; /* Number of dac channel */
sem_t ad_closesem; /* Locks out new opens while close is in progress */
sem_t ad_closesem; /* Locks out new opens while close is
* in progress */
struct dac_fifo_s ad_xmit; /* Describes receive FIFO */
const struct dac_ops_s *ad_ops; /* Arch-specific operations */
void *ad_priv; /* Used by the arch-specific logic */
};
/************************************************************************************
/****************************************************************************
* Public Data
************************************************************************************/
****************************************************************************/
/************************************************************************************
/****************************************************************************
* Public Functions
************************************************************************************/
****************************************************************************/
#if defined(__cplusplus)
extern "C"
{
#endif
/************************************************************************************
/****************************************************************************
* Name: dac_register
*
* Description:
* Register a dac driver.
*
* Input Parameters:
* path - The full path to the DAC device to be registered. This could be, as an
* example, "/dev/dac0"
* path - The full path to the DAC device to be registered. This could
* be, as an example, "/dev/dac0"
* dev - An instance of the device-specific DAC interface
*
* Returned Value:
* Zero on success; A negated errno value on failure.
*
************************************************************************************/
****************************************************************************/
int dac_register(FAR const char *path, FAR struct dac_dev_s *dev);
/************************************************************************************
/****************************************************************************
* Name: dac_txdone
*
* Description:
* Called from the DAC interrupt handler at the completion of a send operation.
* Called from the DAC interrupt handler at the completion of a send
* operation.
*
* Input Parameters:
* dev - An instance of the device-specific DAC interface
@ -195,22 +200,27 @@ int dac_register(FAR const char *path, FAR struct dac_dev_s *dev);
* Returned Value:
* OK on success; a negated errno on failure.
*
************************************************************************************/
****************************************************************************/
int dac_txdone(FAR struct dac_dev_s *dev);
/************************************************************************************
/****************************************************************************
* DAC Initialization functions
*
* Architecture-specific versions will have prototypes in architect-specific header
* files. Common DAC implementations in drivers/analog will have prototypes listed
* below.
* Architecture-specific versions will have prototypes in architect-specific
* header files. Common DAC implementations in drivers/analog will have
* prototypes listed below.
*
************************************************************************************/
****************************************************************************/
FAR struct dac_dev_s *up_ad5410initialize(FAR struct spi_dev_s *spi, unsigned int devno);
FAR struct dac_dev_s *up_ad5410initialize(FAR struct spi_dev_s *spi,
unsigned int devno);
FAR struct dac_dev_s *dac7571_initialize(FAR struct i2c_master_s *i2c, uint8_t addr);
FAR struct dac_dev_s *dac7571_initialize(FAR struct i2c_master_s *i2c,
uint8_t addr);
FAR struct dac_dev_s *dac7554_initialize(FAR struct spi_dev_s *spi,
int spidev);
/****************************************************************************
* Name: lmp92001_dac_initialize