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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
committed by
Gregory Nutt
Gregory Nutt
parent
8493312f00
commit
4710ae736c
+48
-38
@@ -1,4 +1,4 @@
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/************************************************************************************
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/****************************************************************************
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* include/nuttx/analog/dac.h
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*
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* Copyright (C) 2017, 2018 Gregory Nutt. All rights reserved.
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@@ -38,14 +38,14 @@
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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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#ifndef __INCLUDE_NUTTX_ANALOG_DAC_H
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#define __INCLUDE_NUTTX_ANALOG_DAC_H
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/************************************************************************************
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/****************************************************************************
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* Included Files
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************************************************************************************/
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/compiler.h>
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@@ -58,12 +58,13 @@
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#include <nuttx/i2c/i2c_master.h>
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#include <nuttx/spi/spi.h>
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/************************************************************************************
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/****************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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****************************************************************************/
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/* Default configuration settings that may be overridden in the board configuration.
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* file. The configured size is limited to 255 to fit into a uint8_t.
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/* Default configuration settings that may be overridden in the board
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* configuration file. The configured size is limited to 255 to fit into a
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* uint8_t.
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*/
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#if !defined(CONFIG_DAC_FIFOSIZE)
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@@ -73,9 +74,9 @@
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# define CONFIG_DAC_FIFOSIZE 255
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#endif
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/************************************************************************************
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/****************************************************************************
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* Public Types
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************************************************************************************/
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****************************************************************************/
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begin_packed_struct struct dac_msg_s
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{
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@@ -86,15 +87,17 @@ begin_packed_struct struct dac_msg_s
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struct dac_fifo_s
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{
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sem_t af_sem; /* Counting semaphore */
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uint8_t af_head; /* Index to the head [IN] index in the circular buffer */
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uint8_t af_tail; /* Index to the tail [OUT] index in the circular buffer */
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uint8_t af_head; /* Index to the head [IN] index
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* in the circular buffer */
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uint8_t af_tail; /* Index to the tail [OUT] index
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* in the circular buffer */
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/* Circular buffer of DAC messages */
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struct dac_msg_s af_buffer[CONFIG_DAC_FIFOSIZE];
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};
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/* This structure defines all of the operations providd by the architecture specific
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* logic. All fields must be provided with non-NULL function pointers by the
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* caller of dac_register().
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/* This structure defines all of the operations providd by the architecture
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* specific logic. All fields must be provided with non-NULL function
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* pointers by the caller of dac_register().
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*/
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struct dac_dev_s;
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@@ -108,8 +111,8 @@ struct dac_ops_s
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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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* This setup includes configuring and attaching DAC interrupts.
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* Interrupts are all disabled upon return.
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*/
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CODE int (*ao_setup)(FAR struct dac_dev_s *dev);
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@@ -130,7 +133,6 @@ struct dac_ops_s
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/* All ioctl calls will be routed through this method */
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CODE int (*ao_ioctl)(FAR struct dac_dev_s *dev, int cmd, unsigned long arg);
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};
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/* This is the device structure used by the driver. The caller of
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@@ -144,50 +146,53 @@ struct dac_ops_s
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struct dac_dev_s
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{
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uint8_t ad_ocount; /* The number of times the device has been opened */
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uint8_t ad_ocount; /* The number of times the device has
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* been opened */
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uint8_t ad_nchannel; /* Number of dac channel */
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sem_t ad_closesem; /* Locks out new opens while close is in progress */
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sem_t ad_closesem; /* Locks out new opens while close is
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* in progress */
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struct dac_fifo_s ad_xmit; /* Describes receive FIFO */
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const struct dac_ops_s *ad_ops; /* Arch-specific operations */
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void *ad_priv; /* Used by the arch-specific logic */
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};
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/************************************************************************************
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/****************************************************************************
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* Public Data
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************************************************************************************/
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****************************************************************************/
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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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#if defined(__cplusplus)
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extern "C"
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{
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#endif
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/************************************************************************************
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/****************************************************************************
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* Name: dac_register
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*
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* Description:
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* Register a dac driver.
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*
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* Input Parameters:
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* path - The full path to the DAC device to be registered. This could be, as an
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* example, "/dev/dac0"
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* path - The full path to the DAC device to be registered. This could
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* be, as an example, "/dev/dac0"
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* dev - An instance of the device-specific DAC interface
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*
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* Returned Value:
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* Zero on success; A negated errno value on failure.
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*
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************************************************************************************/
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****************************************************************************/
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int dac_register(FAR const char *path, FAR struct dac_dev_s *dev);
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/************************************************************************************
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/****************************************************************************
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* Name: dac_txdone
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*
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* Description:
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* Called from the DAC interrupt handler at the completion of a send operation.
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* Called from the DAC interrupt handler at the completion of a send
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* operation.
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*
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* Input Parameters:
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* dev - An instance of the device-specific DAC interface
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@@ -195,22 +200,27 @@ int dac_register(FAR const char *path, FAR struct dac_dev_s *dev);
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* Returned Value:
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* OK on success; a negated errno on failure.
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*
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************************************************************************************/
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****************************************************************************/
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int dac_txdone(FAR struct dac_dev_s *dev);
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/************************************************************************************
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/****************************************************************************
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* DAC Initialization functions
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*
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* Architecture-specific versions will have prototypes in architect-specific header
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* files. Common DAC implementations in drivers/analog will have prototypes listed
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* below.
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* Architecture-specific versions will have prototypes in architect-specific
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* header files. Common DAC implementations in drivers/analog will have
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* prototypes listed below.
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*
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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, unsigned int devno);
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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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FAR struct dac_dev_s *dac7571_initialize(FAR struct i2c_master_s *i2c, uint8_t addr);
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FAR struct dac_dev_s *dac7571_initialize(FAR struct i2c_master_s *i2c,
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uint8_t addr);
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FAR struct dac_dev_s *dac7554_initialize(FAR struct spi_dev_s *spi,
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int spidev);
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/****************************************************************************
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* Name: lmp92001_dac_initialize
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