158 lines
6.7 KiB
C
158 lines
6.7 KiB
C
/****************************************************************************
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* include/nuttx/analog/ltc1867l.h
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 |
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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 |
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LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH5_M_CH4 = LTC1867L_CONFIG_BIT_OS |
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LTC1867L_CONFIG_BIT_S1,
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LTC1867L_P_CH7_M_CH6 = LTC1867L_CONFIG_BIT_OS |
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LTC1867L_CONFIG_BIT_S1 |
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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 |
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LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH4_M_GND = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_S1,
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LTC1867L_P_CH6_M_GND = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_S1 |
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LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH1_M_GND = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_OS,
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LTC1867L_P_CH3_M_GND = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_OS |
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LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH5_M_GND = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_OS |
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LTC1867L_CONFIG_BIT_S1,
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LTC1867L_P_CH7_M_GND = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_OS |
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LTC1867L_CONFIG_BIT_S1 |
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LTC1867L_CONFIG_BIT_S0,
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LTC1867L_P_CH0_M_CH7COM = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_COM,
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LTC1867L_P_CH2_M_CH7COM = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_S0 |
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LTC1867L_CONFIG_BIT_COM,
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LTC1867L_P_CH4_M_CH7COM = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_S1 |
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LTC1867L_CONFIG_BIT_COM,
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LTC1867L_P_CH6_M_CH7COM = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_S1 |
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LTC1867L_CONFIG_BIT_S0 |
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LTC1867L_CONFIG_BIT_COM,
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LTC1867L_P_CH1_M_CH7COM = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_OS |
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LTC1867L_CONFIG_BIT_COM,
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LTC1867L_P_CH3_M_CH7COM = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_OS |
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LTC1867L_CONFIG_BIT_S0 |
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LTC1867L_CONFIG_BIT_COM,
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LTC1867L_P_CH5_M_CH7COM = LTC1867L_CONFIG_BIT_SD |
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LTC1867L_CONFIG_BIT_OS |
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LTC1867L_CONFIG_BIT_S1 |
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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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