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https://github.com/PX4/PX4-Autopilot.git
synced 2026-06-07 17:35:22 +08:00
Fix logic error in configuring PGA11x devices in a daisy chain. Add logic interface with individual PGA11x chips in a daisy-chain
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4979 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
+275
-62
File diff suppressed because it is too large
Load Diff
@@ -76,7 +76,7 @@
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* CONFIG_SPI_OWNBUS -- If the PGA117 is enabled, this must be set to 'y'
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* if the PGA117 is the only device on the SPI bus;
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* CONFIG_DEBUG_SPI -- With CONFIG_DEBUG and CONFIG_DEBUG_VERBOSE,
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* this will enable debug output from the PGA117 driver.
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* this will enable debug output from the PGA117 driver.
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*/
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#ifndef CONFIG_PGA11X_SPIFREQUENCY
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@@ -132,39 +132,6 @@
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#define PGA11X_CHAN_CAL3 (14) /* CAL3: connects to 0.1VCAL */
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#define PGA11X_CHAN_CAL4 (15) /* CAL4: connects to VREF */
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/* These macros may be used to decode the value returned by pga11x_read() */
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#define PGA11X_GAIN_SHIFT (4) /* B*/
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#define PGA11X_GAIN_MASK (15 << PGA11X_GAIN_SHIFT)
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/* Write command Mux Channel Selection Bits
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*
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* The PGA112/PGA113 have a two-channel input MUX; the PGA116/PGA117 have a
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* 10-channel input MUX.
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*/
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#ifndef CONFIG_PGA11X_DAISYCHAIN
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/* Bits 0-3: Channel Selection Bits
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* Bits 4-7: Gain Selection Bits
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*/
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# define PGA11X_CHAN(value) ((uint16_t)value & 0x000f)
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# define PGA11X_GAIN(value) (((uint16_t)value >> 4) & 0x000f)
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#else
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/* Bits 0-3: U1 Channel Selection Bits
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* Bits 4-7: U1 Gain Selection Bits
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* Bits 16-19: U2 Channel Selection Bits
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* Bits 20-23: U2 Gain Selection Bits
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*/
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# define PGA11X_U1_CHAN(value) ((uint32_t)value & 0x0000000f)
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# define PGA11X_U1_GAIN(value) (((uint32_t)value >> 4) & 0x0000000f)
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# define PGA11X_U2_CHAN(value) (((uint32_t)value >> 16) & 0x0000000f)
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# define PGA11X_U2_GAIN(value) (((uint32_t)value >> 20) & 0x0000000f)
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#endif
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/****************************************************************************
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* Public Types
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****************************************************************************/
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@@ -173,6 +140,42 @@
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typedef FAR void *PGA11X_HANDLE;
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/* Settings for one device in a daisy-chain */
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#ifdef CONFIG_PGA11X_DAISYCHAIN
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struct pga11x_usettings_s
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{
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uint8_t channel; /* See PGA11X_CHAN_* definitions */
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uint8_t gain; /* See PGA11X_GAIN_* definitions */
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};
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#endif
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/* These structures are used to encode gain and channel settings. This
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* includes both devices in the case of a daisy-chained configuration.
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* NOTE: This this logic is currently limited to only 2 devices in the
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* daisy-chain.
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*/
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struct pga11x_settings_s
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{
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#ifndef CONFIG_PGA11X_DAISYCHAIN
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uint8_t channel; /* See PGA11X_CHAN_* definitions */
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uint8_t gain; /* See PGA11X_GAIN_* definitions */
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#else
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struct
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{
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uint8_t channel; /* See PGA11X_CHAN_* definitions */
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uint8_t gain; /* See PGA11X_GAIN_* definitions */
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} u1;
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struct
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{
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uint8_t channel; /* See PGA11X_CHAN_* definitions */
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uint8_t gain; /* See PGA11X_GAIN_* definitions */
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} u2;
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#endif
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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@@ -188,7 +191,7 @@ extern "C" {
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* Name: pga11x_initialize
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*
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* Description:
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* Initialize the PGA117 amplifier/multiplexer.
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* Initialize the PGA117 amplifier/multiplexer(s).
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*
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* Input Parameters:
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* spi - An SPI "bottom half" device driver instance
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@@ -206,61 +209,103 @@ EXTERN PGA11X_HANDLE pga11x_initialize(FAR struct spi_dev_s *spi);
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* Name: pga11x_select
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*
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* Description:
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* Select an input channel and gain.
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* Select an input channel and gain for all PGA11xs.
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*
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* If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_select() configures
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* both chips in the daisy-chain. pga11x_uselect() is provided to support
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* configuring the parts in the daisychain independently.
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*
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* Input Parameters:
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* spi - An SPI "bottom half" device driver instance
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* channel - See the PGA11X_CHAN_* definitions above
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* gain - See the PGA11X_GAIN_* definitions above
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* spi - An SPI "bottom half" device driver instance
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* settings - New channel and gain settings
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*
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* Returned Value:
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* Zero on sucess; a negated errno value on failure.
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*
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****************************************************************************/
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EXTERN int pga11x_select(PGA11X_HANDLE handle, uint8_t channel, uint8_t gain);
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EXTERN int pga11x_select(PGA11X_HANDLE handle,
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FAR const struct pga11x_settings_s *settings);
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/****************************************************************************
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* Name: pga11x_uselect
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*
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* Description:
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* Select an input channel and gain for one PGA11x.
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*
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* If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_uselect() configures
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* one chips in the daisy-chain.
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*
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* Input Parameters:
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* spi - An SPI "bottom half" device driver instance
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* pos - Position of the chip in the daisy chain (0 or 1)
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* settings - New channel and gain settings
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*
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* Returned Value:
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* Zero on sucess; a negated errno value on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_PGA11X_DAISYCHAIN
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EXTERN int pga11x_uselect(PGA11X_HANDLE handle, int pos,
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FAR const struct pga11x_usettings_s *settings);
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#endif
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/****************************************************************************
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* Name: pga11x_read
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*
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* Description:
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* Read from the PGA117 amplifier/multiplexer.
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* Read from all PGA117 amplifier/multiplexers.
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*
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* If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_read() reads from
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* both chips in the daisy-chain. pga11x_uread() is provided to support
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* accessing the parts independently.
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*
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* Input Parameters:
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* spi - An SPI "bottom half" device driver instance
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*
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* Returned Value:
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* 16-bit value read from the device (32-bits in daisy chain mode)
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*
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****************************************************************************/
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#ifdef CONFIG_PGA11X_DAISYCHAIN
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EXTERN uint32_t pga11x_read(PGA11X_HANDLE handle);
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#else
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EXTERN uint16_t pga11x_read(PGA11X_HANDLE handle);
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#endif
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/****************************************************************************
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* Name: pga11x_noop
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*
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* Description:
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* Perform PGA11x no-operation.
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*
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* Input Parameters:
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* spi - An SPI "bottom half" device driver instance
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* spi - An SPI "bottom half" device driver instance
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* settings - Returned channel and gain settings
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*
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* Returned Value:
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* Zero on sucess; a negated errno value on failure.
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*
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****************************************************************************/
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EXTERN int pga11x_noop(PGA11X_HANDLE handle);
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EXTERN int pga11x_read(PGA11X_HANDLE handle,
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FAR struct pga11x_settings_s *settings);
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/****************************************************************************
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* Name: pga11x_uread
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*
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* Description:
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* Read from one PGA117 amplifier/multiplexer.
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*
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* If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_read() reads
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* the parts independently.
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*
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* Input Parameters:
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* spi - An SPI "bottom half" device driver instance
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* pos - Position of the chip in the daisy chain (0 or 1)
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* settings - Returned channel and gain settings
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*
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* Returned Value:
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* Zero on sucess; a negated errno value on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_PGA11X_DAISYCHAIN
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EXTERN int pga11x_uread(PGA11X_HANDLE handle, int pos,
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FAR struct pga11x_usettings_s *settings);
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#endif
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/****************************************************************************
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* Name: pga11x_shutdown
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*
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* Description:
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* Put the PGA11x in shutdown down mode.
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* Put all PGA11x;'s in shutdown down mode.
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*
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* If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_shutdown() controls
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* both chips in the daisy-chain. pga11x_ushutdown() is provided to
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* control the parts independently.
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*
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* Input Parameters:
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* spi - An SPI "bottom half" device driver instance
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@@ -272,11 +317,37 @@ EXTERN int pga11x_noop(PGA11X_HANDLE handle);
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EXTERN int pga11x_shutdown(PGA11X_HANDLE handle);
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/****************************************************************************
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* Name: pga11x_ushutdown
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*
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* Description:
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* Put one PGA11x in shutdown down mode.
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*
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* If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_ushutdown() is
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* provided to shutdown the parts independently.
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*
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* Input Parameters:
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* spi - An SPI "bottom half" device driver instance
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* pos - Position of the chip in the daisy chain (0 or 1)
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*
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* Returned Value:
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* Zero on sucess; a negated errno value on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_PGA11X_DAISYCHAIN
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EXTERN int pga11x_ushutdown(PGA11X_HANDLE handle, int pos);
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#endif
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/****************************************************************************
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* Name: pga11x_enable
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*
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* Description:
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* Take the PGA11x out of shutdown down mode.
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* Take all PGA11x's out of shutdown down mode.
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*
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* If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_enable() controls
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* both chips in the daisy-chain. pga11x_uenable() is provided to
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* control the parts independently.
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*
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* Input Parameters:
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* spi - An SPI "bottom half" device driver instance
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@@ -288,6 +359,28 @@ EXTERN int pga11x_shutdown(PGA11X_HANDLE handle);
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EXTERN int pga11x_enable(PGA11X_HANDLE handle);
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/****************************************************************************
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* Name: pga11x_uenable
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*
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* Description:
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* Take one PGA11x out of shutdown down mode.
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*
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* If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_uenable() is
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* provided to enable the parts independently.
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*
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* Input Parameters:
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* spi - An SPI "bottom half" device driver instance
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* pos - Position of the chip in the daisy chain (0 or 1)
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*
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* Returned Value:
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* Zero on sucess; a negated errno value on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_PGA11X_DAISYCHAIN
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EXTERN int pga11x_uenable(PGA11X_HANDLE handle, int pos);
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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