diff options
Diffstat (limited to 'nuttx/drivers/analog/pga11x.c')
| -rw-r--r-- | nuttx/drivers/analog/pga11x.c | 793 |
1 files changed, 0 insertions, 793 deletions
diff --git a/nuttx/drivers/analog/pga11x.c b/nuttx/drivers/analog/pga11x.c deleted file mode 100644 index 7bb4a11bb..000000000 --- a/nuttx/drivers/analog/pga11x.c +++ /dev/null @@ -1,793 +0,0 @@ -/**************************************************************************** - * drivers/analog/pga11x.c - * - * Copyright (C) 2012 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * References: - * "PGA112, PGA113, PGA116, PGA117: Zerø-Drift PROGRAMMABLE GAIN AMPLIFIER - * with MUX", SBOS424B, March 2008, Revised September 2008, Texas - * Instruments Incorporated" - * - * 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 <assert.h> -#include <errno.h> -#include <debug.h> - -#include <nuttx/analog/pga11x.h> - -#if defined(CONFIG_ADC) && defined(CONFIG_ADC_PGA11X) - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ -/* The PGA112/PGA113 have a three-wire SPI digital interface; the - * PGA116/PGA117 have a four-wire SPI digital interface. The PGA116/117 also - * have daisy-chain capability (The PGA112/PGA113 can be used as the last device - * in a daisy-chain as shown if write-only communication is acceptable). - */ - -/* PGA11x commands (PGA112/PGA113) */ - -#define PGA11X_CMD_READ 0x6a00 -#define PGA11X_CMD_WRITE 0x2a00 -#define PGA11X_CMD_NOOP 0x0000 -#define PGA11X_CMD_SDN_DIS 0xe100 -#define PGA11X_CMD_SDN_EN 0xe1f1 - -/* SPI Daisy-Chain Commands (PGA116/PGA117) */ - -#define PGA11X_DCCMD_SELECTOR 0x8000 -#define PGA11X_DCCMD_NOOP (PGA11X_DCCMD_SELECTOR | PGA11X_CMD_NOOP) -#define PGA11X_DCCMD_SDN_DIS (PGA11X_DCCMD_SELECTOR | PGA11X_CMD_SDN_DIS) -#define PGA11X_DCCMD_SDN_EN (PGA11X_DCCMD_SELECTOR | PGA11X_CMD_SDN_EN) -#define PGA11X_DCCMD_READ (PGA11X_DCCMD_SELECTOR | PGA11X_CMD_READ) -#define PGA11X_DCCMD_WRITE (PGA11X_DCCMD_SELECTOR | PGA11X_CMD_WRITE) - -/* Write command Gain Selection Bits (PGA112/PGA113) - * - * the PGA112 and PGA116 provide binary gain selections (1, 2, 4, 8, 16, 32, - * 64, 128); the PGA113 and PGA117 provide scope gain selections (1, 2, 5, 10, - * 20, 50, 100, 200). - */ - -#define PGA11X_GAIN_SHIFT (4) /* Bits 4-7: Gain Selection Bits */ -#define PGA11X_GAIN_MASK (15 << PGA11X_GAIN_SHIFT) - -/* Write command Mux Channel Selection Bits - * - * The PGA112/PGA113 have a two-channel input MUX; the PGA116/PGA117 have a - * 10-channel input MUX. - */ - -#define PGA11X_CHAN_SHIFT (0) /* Bits 0-3: Channel Selection Bits */ -#define PGA11X_CHAN_MASK (15 << PGA11X_CHAN_SHIFT) - -/* Other definitions ********************************************************/ - -#define SPI_DUMMY 0xff - -/* Debug ********************************************************************/ -/* Check if (non-standard) SPI debug is enabled */ - -#ifndef CONFIG_DEBUG -# undef CONFIG_DEBUG_VERBOSE -# undef CONFIG_DEBUG_SPI -#endif - -#ifdef CONFIG_DEBUG_SPI -# define spidbg dbg -# ifdef CONFIG_DEBUG_VERBOSE -# define spivdbg dbg -# else -# define spivdbg(x...) -# endif -#else -# define spidbg(x...) -# define spivdbg(x...) -#endif - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: pga11x_configure - * - * Description: - * Configure the SPI bus as needed for the PGA11x device. - * - * Returned Value: - * None - * - ****************************************************************************/ - -static void pga11x_configure(FAR struct spi_dev_s *spi) -{ - spivdbg("MODE: %d BITS: 8 Frequency: %d\n", - CONFIG_PGA11X_SPIMODE, CONFIG_PGA11X_SPIFREQUENCY); - - /* Call the setfrequency, setbits, and setmode methods to make sure that - * the SPI is properly configured for the device. - */ - - SPI_SETMODE(spi, CONFIG_PGA11X_SPIMODE); - SPI_SETBITS(spi, 8); - (void)SPI_SETFREQUENCY(spi, CONFIG_PGA11X_SPIFREQUENCY); -} - -/**************************************************************************** - * Name: pga11x_lock - * - * Description: - * Lock the SPI bus and configure it as needed for the PGA11x device. - * - * Returned Value: - * None - * - ****************************************************************************/ - -#ifndef CONFIG_SPI_OWNBUS -static void pga11x_lock(FAR struct spi_dev_s *spi) -{ - spivdbg("Locking\n"); - - /* On SPI busses where there are multiple devices, it will be necessary to - * lock SPI to have exclusive access to the busses for a sequence of - * transfers. The bus should be locked before the chip is selected. - * - * This is a blocking call and will not return until we have exclusiv access to - * the SPI buss. We will retain that exclusive access until the bus is unlocked. - */ - - SPI_LOCK(spi, true); - - /* After locking the SPI bus, the we also need call the setfrequency, setbits, and - * setmode methods to make sure that the SPI is properly configured for the device. - * If the SPI buss is being shared, then it may have been left in an incompatible - * state. - */ - - pga11x_configure(spi); -} -#else -# define pga11x_lock(spi) -#endif - -/**************************************************************************** - * Name: pga11x_unlock - * - * Description: - * Lock the SPI bus and configure it as needed for the PGA11x device. - * - * Returned Value: - * None - * - ****************************************************************************/ - -#ifndef CONFIG_SPI_OWNBUS -static inline void pga11x_unlock(FAR struct spi_dev_s *spi) -{ - spivdbg("Unlocking\n"); - - SPI_LOCK(spi, false); -} -#else -# define pga11x_unlock(spi) -#endif - -/**************************************************************************** - * Name: pga11x_send16 - * - * Description: - * Send 16 bits of data, ignoring any returned data - * - * Input Parameters: - * spi - PGA11X driver instance - * word - The data to send - * - * Returned Value: - * None - * - * Assumptions: - * The bus is locked and the device is selected - * - ****************************************************************************/ - -static void pga11x_send16(FAR struct spi_dev_s *spi, uint16_t word) -{ - spivdbg("Send %04x\n", word); - - /* The logical interface is 16-bits wide. However, this driver uses a - * 8-bit configuration for greaer portability. - * - * Send the MS byte first. Then the LS byte. - */ - - SPI_SEND(spi, word >> 8); - SPI_SEND(spi, word & 0xff); -} - -/**************************************************************************** - * Name: pga11x_recv16 - * - * Description: - * Receive 16 bits of data. - * - * Input Parameters: - * spi - PGA11X driver instance - * - * Returned Value: - * The received 16-bit value - * - * Assumptions: - * The bus is locked and the device is selected - * - ****************************************************************************/ - -static uint16_t pga11x_recv16(FAR struct spi_dev_s *spi) -{ - uint8_t msb; - uint8_t lsb; - - /* The logical interface is 16-bits wide. However, this driver uses a - * 8-bit configuration for greaer portability. - * - * Send a dummy byte and receive MS byte first. Then the LS byte. - */ - - msb = SPI_SEND(spi, SPI_DUMMY); - lsb = SPI_SEND(spi, SPI_DUMMY); - spivdbg("Received %02x %02x\n", msb, lsb); - - return ((uint16_t)msb << 8) | (uint16_t)lsb; -} - -/**************************************************************************** - * Name: pga11x_write - * - * Description: - * Send a 16-bit command. - * - * Input Parameters: - * spi - PGA11X driver instance - * cmd - PGA11X command (non-daisy chained) - * u1cmd - PGA11X U1 command (daisy chained) - * u2cmd - PGA11X U2 command (daisy chained) - * - * Returned Value: - * The received 16-bit value - * - * Assumptions: - * The device is NOT selected and the NOT bus is locked. - * - ****************************************************************************/ - -#ifndef CONFIG_PGA11X_DAISYCHAIN -static void pga11x_write(FAR struct spi_dev_s *spi, uint16_t cmd) -{ - spivdbg("cmd %04x\n", cmd); - - /* Lock, select, send the 16-bit command, de-select, and un-lock. */ - - pga11x_lock(spi); - SPI_SELECT(spi, SPIDEV_MUX, true); - pga11x_send16(spi, cmd); - SPI_SELECT(spi, SPIDEV_MUX, false); - pga11x_unlock(spi); -} -#else -static void pga11x_write(FAR struct spi_dev_s *spi, uint16_t u1cmd, uint16_t u2cmd) -{ - spivdbg("U1 cmd: %04x U2 cmd: %04x\n", u1cmd, u2cmd); - - /* Lock, select, send the U2 16-bit command, the U1 16-bit command, de-select, - * and un-lock. - */ - - pga11x_lock(spi); - SPI_SELECT(spi, SPIDEV_MUX, true); - pga11x_send16(spi, u2cmd); - pga11x_send16(spi, u1cmd); - SPI_SELECT(spi, SPIDEV_MUX, false); - pga11x_unlock(spi); -} -#endif - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: pga11x_initialize - * - * Description: - * Initialize the PGA117 amplifier/multiplexer(s). - * - * Input Parameters: - * spi - An SPI "bottom half" device driver instance - * - * Returned Value: - * On success, a non-NULL opaque handle is returned; a NULL is returned - * on any failure. This handle may be used with the other PGA117 interface - * functions to control the multiplexer - * - ****************************************************************************/ - -PGA11X_HANDLE pga11x_initialize(FAR struct spi_dev_s *spi) -{ - spivdbg("Entry\n"); - - /* Configure the SPI us for the device. Do this now only if the PGA11X is - * the only device on the bus. - */ - -#ifdef CONFIG_SPI_OWNBUS - pga11x_configure(spi); -#endif - - /* No other special state is required, just return the SPI driver instance - * as the handle. This gives us a place to extend functionality in the - * future if neccessary. - */ - - return (PGA11X_HANDLE)spi; -} - -/**************************************************************************** - * Name: pga11x_select - * - * Description: - * Select an input channel and gain for all PGA11xs. - * - * If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_select() configures - * both chips in the daisy-chain. pga11x_uselect() is provided to support - * configuring the parts in the daisychain independently. - * - * Input Parameters: - * spi - An SPI "bottom half" device driver instance - * settings - New channel and gain settings - * - * Returned Value: - * Zero on sucess; a negated errno value on failure. - * - ****************************************************************************/ - -int pga11x_select(PGA11X_HANDLE handle, - FAR const struct pga11x_settings_s *settings) -{ -#ifndef CONFIG_PGA11X_DAISYCHAIN - FAR struct spi_dev_s *spi = (FAR struct spi_dev_s *)handle; - uint16_t cmd; - - DEBUGASSERT(handle && settings); - spivdbg("channel: %d gain: %d\n", settings->channel, settings->gain); - - /* Format the command */ - - cmd = PGA11X_CMD_WRITE | - ((uint16_t)settings->channel << PGA11X_CHAN_SHIFT) | - ((uint16_t)settings->gain << PGA11X_GAIN_SHIFT); - - /* Send the command */ - - pga11x_write(spi, cmd); - return OK; -#else - FAR struct spi_dev_s *spi = (FAR struct spi_dev_s *)handle; - uint16_t u1cmd; - uint16_t u2cmd; - - DEBUGASSERT(handle && settings); - spivdbg("U1 channel: %d gain: %d\n", settings->u1.channel, settings->u1.gain); - spivdbg("U1 channel: %d gain: %d\n", settings->u1.channel, settings->u1.gain); - - /* Format the commands */ - - u1cmd = PGA11X_CMD_WRITE | - ((uint16_t)settings->u1.channel << PGA11X_CHAN_SHIFT) | - ((uint16_t)settings->u1.gain << PGA11X_GAIN_SHIFT); - - u2cmd = PGA11X_DCCMD_WRITE | - ((uint16_t)settings->u2.channel << PGA11X_CHAN_SHIFT) | - ((uint16_t)settings->u2.gain << PGA11X_GAIN_SHIFT); - - /* Send the command */ - - pga11x_write(spi, u1cmd, u2cmd); - return OK; -#endif -} - -/**************************************************************************** - * Name: pga11x_uselect - * - * Description: - * Select an input channel and gain for one PGA11x. - * - * If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_uselect() configures - * one chips in the daisy-chain. - * - * Input Parameters: - * spi - An SPI "bottom half" device driver instance - * pos - Position of the chip in the daisy chain (0 or 1) - * settings - New channel and gain settings - * - * Returned Value: - * Zero on sucess; a negated errno value on failure. - * - ****************************************************************************/ - -#ifdef CONFIG_PGA11X_DAISYCHAIN -int pga11x_uselect(PGA11X_HANDLE handle, int pos, - FAR const struct pga11x_usettings_s *settings) -{ - FAR struct spi_dev_s *spi = (FAR struct spi_dev_s *)handle; - uint16_t u1cmd; - uint16_t u2cmd; - - spivdbg("channel: %d gain: %d\n", settings->channel, settings->gain); - DEBUGASSERT(handle); - - /* Format the commands */ - - if (pos == 0) - { - u1cmd = PGA11X_CMD_WRITE | - ((uint16_t)settings->channel << PGA11X_CHAN_SHIFT) | - ((uint16_t)settings->gain << PGA11X_GAIN_SHIFT); - u2cmd = PGA11X_DCCMD_NOOP; - } - else /* if (pos == 1) */ - { - u1cmd = PGA11X_CMD_NOOP; - u2cmd = PGA11X_DCCMD_WRITE | - ((uint16_t)settings->channel << PGA11X_CHAN_SHIFT) | - ((uint16_t)settings->gain << PGA11X_GAIN_SHIFT); - } - - /* Send the command */ - - pga11x_write(spi, u1cmd, u2cmd); - return OK; -} -#endif - -/**************************************************************************** - * Name: pga11x_read - * - * Description: - * Read from all PGA117 amplifier/multiplexers. - * - * If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_read() reads from - * both chips in the daisy-chain. pga11x_uread() is provided to support - * accessing the parts independently. - * - * Input Parameters: - * spi - An SPI "bottom half" device driver instance - * settings - Returned channel and gain settings - * - * Returned Value: - * Zero on sucess; a negated errno value on failure. - * - ****************************************************************************/ - -int pga11x_read(PGA11X_HANDLE handle, FAR struct pga11x_settings_s *settings) -{ -#ifdef CONFIG_PGA11X_DAISYCHAIN - FAR struct spi_dev_s *spi = (FAR struct spi_dev_s *)handle; - uint16_t u1value; - uint16_t u2value; - - spivdbg("Entry\n"); - DEBUGASSERT(handle && settings); - - /* Lock the bus and read the configuration */ - - pga11x_lock(spi); - - /* Select, send the 16-bit command, the 16-bit daisy-chain command, and - * then de-select the part. I do not know if de-selection between word - * transfers is required. However, it is shown in the timing diagrams - * for the part. - */ - - SPI_SELECT(spi, SPIDEV_MUX, true); - pga11x_send16(spi, PGA11X_CMD_READ); - pga11x_send16(spi, PGA11X_DCCMD_READ); - SPI_SELECT(spi, SPIDEV_MUX, false); - - /* Re-select, get the returned values, de-select, and unlock */ - - SPI_SELECT(spi, SPIDEV_MUX, true); - u2value = pga11x_recv16(spi); - u1value = pga11x_recv16(spi); - SPI_SELECT(spi, SPIDEV_MUX, false); - pga11x_unlock(spi); - - /* Decode the returned value */ - - spivdbg("Returning %04x %04x\n", u2value, u1value); - settings->u1.channel = (uint8_t)((u1value & PGA11X_CHAN_MASK) >> PGA11X_CHAN_SHIFT); - settings->u1.gain = (uint8_t)((u1value & PGA11X_GAIN_MASK) >> PGA11X_GAIN_SHIFT); - settings->u2.channel = (uint8_t)((u2value & PGA11X_CHAN_MASK) >> PGA11X_CHAN_SHIFT); - settings->u2.gain = (uint8_t)((u2value & PGA11X_GAIN_MASK) >> PGA11X_GAIN_SHIFT); - return OK; -#else - FAR struct spi_dev_s *spi = (FAR struct spi_dev_s *)handle; - uint16_t value; - - spivdbg("Entry\n"); - DEBUGASSERT(handle); - - /* Lock the bus and read the configuration */ - - pga11x_lock(spi); - - /* Select, send the 16-bit PGA11X_CMD_READ command, and de-select. I do - * not know if de-selection between word transfers is required. However, - * it is shown in the timing diagrams for the part. - */ - - SPI_SELECT(spi, SPIDEV_MUX, true); - pga11x_send16(spi, PGA11X_CMD_READ); - SPI_SELECT(spi, SPIDEV_MUX, false); - - /* Re-select, get the returned value, de-select, and unlock */ - - SPI_SELECT(spi, SPIDEV_MUX, true); - value = pga11x_recv16(spi); - SPI_SELECT(spi, SPIDEV_MUX, false); - pga11x_unlock(spi); - - /* Decode the returned value */ - - spivdbg("Returning: %04x\n", value); - settings->channel = (uint8_t)((value & PGA11X_CHAN_MASK) >> PGA11X_CHAN_SHIFT); - settings->gain = (uint8_t)((value & PGA11X_GAIN_MASK) >> PGA11X_GAIN_SHIFT); - return OK; -#endif -} - -/**************************************************************************** - * Name: pga11x_uread - * - * Description: - * Read from one PGA117 amplifier/multiplexer. - * - * If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_read() reads - * the parts independently. - * - * Input Parameters: - * spi - An SPI "bottom half" device driver instance - * pos - Position of the chip in the daisy chain (0 or 1) - * settings - Returned channel and gain settings - * - * Returned Value: - * Zero on sucess; a negated errno value on failure. - * - ****************************************************************************/ - -#ifdef CONFIG_PGA11X_DAISYCHAIN -int pga11x_uread(PGA11X_HANDLE handle, int pos, - FAR struct pga11x_usettings_s *settings) -{ - struct pga11x_settings_s both; - int ret = pga11x_read(handle, &both); - if (ret == OK) - { - if (pos == 0) - { - settings->channel = both.u1.channel; - settings->gain = both.u1.gain; - } - else /* if (pos == 1) */ - { - settings->channel = both.u2.channel; - settings->gain = both.u2.gain; - } - } - - return ret; -} -#endif - -/**************************************************************************** - * Name: pga11x_shutdown - * - * Description: - * Put all PGA11x's in shutdown down mode. - * - * If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_shutdown() controls - * both chips in the daisy-chain. pga11x_ushutdown() is provided to - * control the parts independently. - * - * Input Parameters: - * spi - An SPI "bottom half" device driver instance - * - * Returned Value: - * Zero on sucess; a negated errno value on failure. - * - ****************************************************************************/ - -int pga11x_shutdown(PGA11X_HANDLE handle) -{ - FAR struct spi_dev_s *spi = (FAR struct spi_dev_s *)handle; - - spivdbg("Entry\n"); - DEBUGASSERT(handle); - - /* Enter shutdown mode by issuing an SDN_EN command */ - -#ifdef CONFIG_PGA11X_DAISYCHAIN - pga11x_write(spi, PGA11X_CMD_SDN_EN, PGA11X_DCCMD_SDN_EN); -#else - pga11x_write(spi, PGA11X_CMD_SDN_EN); -#endif - return OK; -} - -/**************************************************************************** - * Name: pga11x_ushutdown - * - * Description: - * Put one PGA11x in shutdown down mode. - * - * If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_ushutdown() is - * provided to shutdown the parts independently. - * - * Input Parameters: - * spi - An SPI "bottom half" device driver instance - * pos - Position of the chip in the daisy chain (0 or 1) - * - * Returned Value: - * Zero on sucess; a negated errno value on failure. - * - ****************************************************************************/ - -#ifdef CONFIG_PGA11X_DAISYCHAIN -int pga11x_ushutdown(PGA11X_HANDLE handle, int pos) -{ - FAR struct spi_dev_s *spi = (FAR struct spi_dev_s *)handle; - - spivdbg("Entry\n"); - DEBUGASSERT(handle); - - /* Enter shutdown mode by issuing an SDN_EN command */ - - if (pos == 0) - { - pga11x_write(spi, PGA11X_CMD_SDN_EN, PGA11X_DCCMD_NOOP); - } - else - { - pga11x_write(spi, PGA11X_CMD_NOOP, PGA11X_DCCMD_SDN_EN); - } - - return OK; -} -#endif - -/**************************************************************************** - * Name: pga11x_enable - * - * Description: - * Take all PGA11x's out of shutdown down mode. - * - * If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_enable() controls - * both chips in the daisy-chain. pga11x_uenable() is provided to - * control the parts independently. - * - * Input Parameters: - * spi - An SPI "bottom half" device driver instance - * - * Returned Value: - * Zero on sucess; a negated errno value on failure. - * - ****************************************************************************/ - -int pga11x_enable(PGA11X_HANDLE handle) -{ - FAR struct spi_dev_s *spi = (FAR struct spi_dev_s *)handle; - - spivdbg("Entry\n"); - DEBUGASSERT(handle); - - /* Lock the bus and send the shutdown disable command. Shutdown mode is - * cleared (returned to the last valid write configuration) by the SDN_DIS - * command or by any valid Write command - */ - -#ifdef CONFIG_PGA11X_DAISYCHAIN - pga11x_write(spi, PGA11X_CMD_SDN_DIS, PGA11X_DCCMD_SDN_DIS); -#else - pga11x_write(spi, PGA11X_CMD_SDN_DIS); -#endif - return OK; -} - -/**************************************************************************** - * Name: pga11x_uenable - * - * Description: - * Take one PGA11x out of shutdown down mode. - * - * If CONFIG_PGA11X_DAISYCHAIN is defined, then pga11x_uenable() is - * provided to enable the parts independently. - * - * Input Parameters: - * spi - An SPI "bottom half" device driver instance - * pos - Position of the chip in the daisy chain (0 or 1) - * - * Returned Value: - * Zero on sucess; a negated errno value on failure. - * - ****************************************************************************/ - -#ifdef CONFIG_PGA11X_DAISYCHAIN -int pga11x_uenable(PGA11X_HANDLE handle, int pos) -{ - FAR struct spi_dev_s *spi = (FAR struct spi_dev_s *)handle; - - spivdbg("Entry\n"); - DEBUGASSERT(handle); - - /* Enter shutdown mode by issuing an SDN_EN command */ - - if (pos == 0) - { - pga11x_write(spi, PGA11X_CMD_SDN_DIS, PGA11X_DCCMD_NOOP); - } - else - { - pga11x_write(spi, PGA11X_CMD_NOOP, PGA11X_DCCMD_SDN_DIS); - } - - return OK; -} -#endif - -#endif /* CONFIG_ADC && CONFIG_ADC_PGA11X */ - |