/**************************************************************************** * include/nuttx/analog/ltc1867l.h * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ #ifndef __INCLUDE_NUTTX_ANALOG_LTC1867L_H #define __INCLUDE_NUTTX_ANALOG_LTC1867L_H /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #if defined(CONFIG_ADC_LTC1867L) /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* LTC1867L Configuration ***************************************************/ #define LTC1867L_CONFIG_BIT_SLP (1 << 1) #define LTC1867L_CONFIG_BIT_UNI (1 << 2) #define LTC1867L_CONFIG_BIT_COM (1 << 3) #define LTC1867L_CONFIG_BIT_S0 (1 << 4) #define LTC1867L_CONFIG_BIT_S1 (1 << 5) #define LTC1867L_CONFIG_BIT_OS (1 << 6) #define LTC1867L_CONFIG_BIT_SD (1 << 7) /**************************************************************************** * Public Types ****************************************************************************/ enum ltc1867l_analog_multiplexer_config_e { LTC1867L_P_CH0_M_CH1 = 0, LTC1867L_P_CH2_M_CH3 = LTC1867L_CONFIG_BIT_S0, LTC1867L_P_CH4_M_CH5 = LTC1867L_CONFIG_BIT_S1, LTC1867L_P_CH6_M_CH7 = LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_S0, LTC1867L_P_CH1_M_CH0 = LTC1867L_CONFIG_BIT_OS, LTC1867L_P_CH3_M_CH2 = LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S0, LTC1867L_P_CH5_M_CH4 = LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S1, LTC1867L_P_CH7_M_CH6 = LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_S0, LTC1867L_P_CH0_M_GND = LTC1867L_CONFIG_BIT_SD, LTC1867L_P_CH2_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_S0, LTC1867L_P_CH4_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_S1, LTC1867L_P_CH6_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_S0, LTC1867L_P_CH1_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS, LTC1867L_P_CH3_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S0, LTC1867L_P_CH5_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S1, LTC1867L_P_CH7_M_GND = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_S0, LTC1867L_P_CH0_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_COM, LTC1867L_P_CH2_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_S0 | LTC1867L_CONFIG_BIT_COM, LTC1867L_P_CH4_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_COM, LTC1867L_P_CH6_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_S0 | LTC1867L_CONFIG_BIT_COM, LTC1867L_P_CH1_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_COM, LTC1867L_P_CH3_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S0 | LTC1867L_CONFIG_BIT_COM, LTC1867L_P_CH5_M_CH7COM = LTC1867L_CONFIG_BIT_SD | LTC1867L_CONFIG_BIT_OS | LTC1867L_CONFIG_BIT_S1 | LTC1867L_CONFIG_BIT_COM }; enum ltc1867l_analog_input_mode_e { LTC1867L_UNIPOLAR = LTC1867L_CONFIG_BIT_UNI, LTC1867L_BIPOLAR = 0, }; begin_packed_struct struct ltc1867l_channel_config_s { uint8_t channel; /* This will be the channel number returned in struct adc_msg_s for a conversion */ enum ltc1867l_analog_multiplexer_config_e analog_multiplexer_config; /* Analog multiplexer configuration */ enum ltc1867l_analog_input_mode_e analog_inputmode; /* Analog input mode */ } end_packed_struct; /**************************************************************************** * Public Function Prototypes ****************************************************************************/ /**************************************************************************** * Name: ltc1867l_register * * Description: * Register the LTC1867L character device as 'devpath' * * Input Parameters: * devpath - The full path to the driver to register. E.g., "/dev/adc0" * spi - An instance of the SPI interface to use to communicate with * LTC1867L * devno - SPI device number * channel_config - A pointer to an array which holds the configuration * for each sampled channel. * channel_config_count - Number of channels to sample * * Returned Value: * Zero (OK) on success; a negated errno value on failure. * ****************************************************************************/ int ltc1867l_register(FAR const char *devpath, FAR struct spi_dev_s *spi, unsigned int devno, FAR struct ltc1867l_channel_config_s *channel_config, int channel_config_count); #endif /* CONFIG_ADC_LTC1867L */ #endif /* __INCLUDE_NUTTX_ANALOG_LTC1867L_H */