138 lines
6.6 KiB
C
138 lines
6.6 KiB
C
/****************************************************************************
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* include/nuttx/sensors/ltc1867l.h
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*
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* Copyright (C) 2017 DS-Automotion GmbH. All rights reserved.
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* Author: Martin Lederhilger <m.lederhilger@ds-automotion.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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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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#ifndef __INCLUDE_NUTTX_ANALOG_LTC1867L_H
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#define __INCLUDE_NUTTX_ANALOG_LTC1867L_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/spi/spi.h>
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#include <stdint.h>
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#if defined(CONFIG_ADC_LTC1867L)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* LTC1867L Configuration *******************************************/
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#define LTC1867L_CONFIG_BIT_SLP (1 << 1)
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#define LTC1867L_CONFIG_BIT_UNI (1 << 2)
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#define LTC1867L_CONFIG_BIT_COM (1 << 3)
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#define LTC1867L_CONFIG_BIT_S0 (1 << 4)
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#define LTC1867L_CONFIG_BIT_S1 (1 << 5)
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#define LTC1867L_CONFIG_BIT_OS (1 << 6)
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#define LTC1867L_CONFIG_BIT_SD (1 << 7)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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enum ltc1867l_analog_multiplexer_config_e
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{
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LTC1867L_P_CH0_M_CH1 = 0,
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LTC1867L_P_CH2_M_CH3 = LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH4_M_CH5 = LTC1867L_CONFIG_BIT_S1,
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LTC1867L_P_CH6_M_CH7 = LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH1_M_CH0 = LTC1867L_CONFIG_BIT_OS,
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LTC1867L_P_CH3_M_CH2 = LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH5_M_CH4 = LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S1,
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LTC1867L_P_CH7_M_CH6 = LTC1867L_CONFIG_BIT_OS |LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH0_M_GND = LTC1867L_CONFIG_BIT_SD,
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LTC1867L_P_CH2_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH4_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_S1,
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LTC1867L_P_CH6_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH1_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS,
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LTC1867L_P_CH3_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH5_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S1,
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LTC1867L_P_CH7_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH0_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_COM,
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LTC1867L_P_CH2_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_S0 | LTC1867L_CONFIG_BIT_COM,
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LTC1867L_P_CH4_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_COM,
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LTC1867L_P_CH6_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_S0 | LTC1867L_CONFIG_BIT_COM,
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LTC1867L_P_CH1_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_COM,
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LTC1867L_P_CH3_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S0 | LTC1867L_CONFIG_BIT_COM,
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LTC1867L_P_CH5_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_COM
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};
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enum ltc1867l_analog_input_mode_e
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{
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LTC1867L_UNIPOLAR = LTC1867L_CONFIG_BIT_UNI,
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LTC1867L_BIPOLAR = 0,
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};
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begin_packed_struct struct ltc1867l_channel_config_s
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{
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uint8_t channel; /* This will be the channel number returned in struct adc_msg_s for a conversion */
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enum ltc1867l_analog_multiplexer_config_e analog_multiplexer_config; /* Analog multiplexer configuration */
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enum ltc1867l_analog_input_mode_e analog_inputMode; /* Analog input mode */
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} end_packed_struct;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: ltc1867l_register
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*
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* Description:
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* Register the LTC1867L character device as 'devpath'
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*
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* Input Parameters:
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* devpath - The full path to the driver to register. E.g., "/dev/adc0"
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* spi - An instance of the SPI interface to use to communicate with
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* LTC1867L
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* devno - SPI device number
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* channel_config - A pointer to an array which holds the configuration
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* for each sampled channel.
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* channel_config_count - Number of channels to sample
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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****************************************************************************/
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int ltc1867l_register(FAR const char *devpath, FAR struct spi_dev_s *spi,
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unsigned int devno,
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FAR struct ltc1867l_channel_config_s* channel_config,
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int channel_config_count);
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#endif /* CONFIG_ADC_LTC1867L */
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#endif /* __INCLUDE_NUTTX_ANALOG_LTC1867L_H */
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