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More STM32 DAC driver logic

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4186 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2011-12-15 16:39:06 +00:00
parent 18d89455ad
commit b890380f57
9 changed files with 461 additions and 78 deletions
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include/nuttx/analog/dac.h
+32 -9
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@@ -6,6 +6,7 @@
* History: 0.1 2011-08-04 initial version
*
* Derived from include/nuttx/can.h
*
* Copyright (C) 2008, 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
@@ -71,10 +72,11 @@
/************************************************************************************
* Public Types
************************************************************************************/
struct dac_msg_s
{
uint8_t am_channel; /* The 8-bit DAC Channel */
int32_t am_data; /* DAC convert result (4 bytes) */
uint8_t am_channel; /* The 8-bit DAC Channel */
int32_t am_data; /* DAC convert result (4 bytes) */
};
struct dac_fifo_s
@@ -138,12 +140,12 @@ struct dac_ops_s
struct dac_dev_s
{
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 */
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 */
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 */
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 */
};
/************************************************************************************
@@ -157,12 +159,21 @@ struct dac_dev_s
#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"
* 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);
@@ -173,14 +184,26 @@ int dac_register(FAR const char *path, FAR struct dac_dev_s *dev);
* Description:
* Called from the DAC interrupt handler at the completion of a send operation.
*
* Input Parameters:
* dev - An instance of the device-specific DAC interface
*
* Return:
* 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.
*
************************************************************************************/
FAR struct dac_dev_s *up_ad5410initialize(FAR struct spi_dev_s *spi, unsigned int devno);
FAR struct dac_dev_s *up_dacinitialize();
#if defined(__cplusplus)
}