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Update I/O Expander skeleton.c file
This commit is contained in:
Gregory Nutt
parent
99843fe5fe
commit
c6d65b0943
2 changed files with 180 additions and 19 deletions
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@ -319,7 +319,15 @@ static int pca9555_getbit(FAR struct pca9555_dev_s *pca, uint8_t addr,
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* Name: pca9555_direction
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Set the direction of an ioexpander pin. Required.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The index of the pin to alter in this call
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* dir - One of the IOEXPANDER_DIRECTION_ macros
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -342,7 +350,18 @@ static int pca9555_direction(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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* Name: pca9555_option
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Set pin options. Required.
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* Since all IO expanders have various pin options, this API allows setting
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* pin options in a flexible way.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The index of the pin to alter in this call
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* opt - One of the IOEXPANDER_OPTION_ macros
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* val - The option's value
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -350,7 +369,7 @@ static int pca9555_option(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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int opt, FAR void *val)
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{
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FAR struct pca9555_dev_s *pca = (FAR struct pca9555_dev_s *)dev;
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int ival = (int)val;
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int ival = (int)((intptr_t)val);
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int ret = -EINVAL;
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if (opt == IOEXPANDER_OPTION_INVERT)
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@ -369,7 +388,16 @@ static int pca9555_option(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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* Name: pca9555_writepin
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Set the pin level. Required.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The index of the pin to alter in this call
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* val - The pin level. Usually TRUE will set the pin high,
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* except if OPTION_INVERT has been set on this pin.
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -391,7 +419,17 @@ static int pca9555_writepin(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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* Name: pca9555_readpin
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Read the actual PIN level. This can be different from the last value written
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* to this pin. Required.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The index of the pin
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* valptr - Pointer to a buffer where the pin level is stored. Usually TRUE
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* if the pin is high, except if OPTION_INVERT has been set on this pin.
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -413,7 +451,16 @@ static int pca9555_readpin(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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* Name: pca9555_readbuf
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Read the buffered pin level.
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* This can be different from the actual pin state. Required.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The index of the pin
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* valptr - Pointer to a buffer where the level is stored.
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -490,7 +537,16 @@ static int pca9555_getmultibits(FAR struct pca9555_dev_s *pca, uint8_t addr,
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* Name: pca9555_multiwritepin
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Set the pin level for multiple pins. This routine may be faster than
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* individual pin accesses. Optional.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pins - The list of pin indexes to alter in this call
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* val - The list of pin levels.
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -574,7 +630,16 @@ static int pca9555_multiwritepin(FAR struct ioexpander_dev_s *dev,
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* Name: pca9555_multireadpin
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Read the actual level for multiple pins. This routine may be faster than
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* individual pin accesses. Optional.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The list of pin indexes to read
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* valptr - Pointer to a buffer where the pin levels are stored.
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -598,7 +663,16 @@ static int pca9555_multireadpin(FAR struct ioexpander_dev_s *dev,
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* Name: pca9555_multireadbuf
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Read the buffered level of multiple pins. This routine may be faster than
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* individual pin accesses. Optional.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The index of the pin
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* valptr - Pointer to a buffer where the buffered levels are stored.
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -182,7 +182,15 @@ static void skel_lock(FAR struct skel_dev_s *priv)
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* Name: skel_direction
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Set the direction of an ioexpander pin. Required.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The index of the pin to alter in this call
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* dir - One of the IOEXPANDER_DIRECTION_ macros
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -214,7 +222,18 @@ static int skel_direction(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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* Name: skel_option
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Set pin options. Required.
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* Since all IO expanders have various pin options, this API allows setting
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* pin options in a flexible way.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The index of the pin to alter in this call
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* opt - One of the IOEXPANDER_OPTION_ macros
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* val - The option's value
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -222,8 +241,13 @@ static int skel_option(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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int opt, FAR void *val)
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{
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FAR struct skel_dev_s *priv = (FAR struct skel_dev_s *)dev;
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int ival = (int)((intptr_t)val);
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int ret = -EINVAL;
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int ret = -ENOSYS;
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gpioinfo("addr=%02x pin=%u option=%u\n", priv->addr, pin, opt);
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DEBUGASSERT(priv != NULL);
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/* Check for pin polarity inversion. */
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if (opt == IOEXPANDER_OPTION_INVERT)
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{
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@ -244,7 +268,16 @@ static int skel_option(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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* Name: skel_writepin
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Set the pin level. Required.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The index of the pin to alter in this call
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* val - The pin level. Usually TRUE will set the pin high,
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* except if OPTION_INVERT has been set on this pin.
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -273,7 +306,17 @@ static int skel_writepin(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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* Name: skel_readpin
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Read the actual PIN level. This can be different from the last value written
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* to this pin. Required.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The index of the pin
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* valptr - Pointer to a buffer where the pin level is stored. Usually TRUE
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* if the pin is high, except if OPTION_INVERT has been set on this pin.
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -302,7 +345,16 @@ static int skel_readpin(FAR struct ioexpander_dev_s *dev, uint8_t pin,
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* Name: skel_readbuf
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Read the buffered pin level.
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* This can be different from the actual pin state. Required.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The index of the pin
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* valptr - Pointer to a buffer where the level is stored.
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -364,7 +416,16 @@ static int skel_getmultibits(FAR struct skel_dev_s *priv, FAR uint8_t *pins,
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* Name: skel_multiwritepin
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Set the pin level for multiple pins. This routine may be faster than
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* individual pin accesses. Optional.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pins - The list of pin indexes to alter in this call
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* val - The list of pin levels.
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -419,7 +480,16 @@ static int skel_multiwritepin(FAR struct ioexpander_dev_s *dev,
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* Name: skel_multireadpin
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Read the actual level for multiple pins. This routine may be faster than
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* individual pin accesses. Optional.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The list of pin indexes to read
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* valptr - Pointer to a buffer where the pin levels are stored.
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -431,6 +501,10 @@ static int skel_multireadpin(FAR struct ioexpander_dev_s *dev,
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FAR struct skel_dev_s *priv = (FAR struct skel_dev_s *)dev;
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int ret;
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gpioinfo("count=%u\n", count);
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DEBUGASSERT(priv != NULL && pins != NULL && values != NULL && count > 0);
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/* Get exclusive access to the I/O Expander */
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skel_lock(priv);
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@ -444,7 +518,16 @@ static int skel_multireadpin(FAR struct ioexpander_dev_s *dev,
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* Name: skel_multireadbuf
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*
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* Description:
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* See include/nuttx/ioexpander/ioexpander.h
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* Read the buffered level of multiple pins. This routine may be faster than
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* individual pin accesses. Optional.
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*
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* Input Parameters:
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* dev - Device-specific state data
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* pin - The index of the pin
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* valptr - Pointer to a buffer where the buffered levels are stored.
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*
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* Returned Value:
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* 0 on success, else a negative error code
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*
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****************************************************************************/
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@ -456,6 +539,10 @@ static int skel_multireadbuf(FAR struct ioexpander_dev_s *dev,
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FAR struct skel_dev_s *priv = (FAR struct skel_dev_s *)dev;
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int ret;
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gpioinfo("count=%u\n", count);
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DEBUGASSERT(priv != NULL && pins != NULL && values != NULL && count > 0);
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/* Get exclusive access to the I/O Expander */
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skel_lock(priv);
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