57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/* adc-ti-adc108s102.h - Private */
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/*
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* Copyright (c) 2015 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_DRIVERS_ADC_ADC_TI_ADC108S102_H_
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#define ZEPHYR_DRIVERS_ADC_ADC_TI_ADC108S102_H_
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#include <spi.h>
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#include <adc.h>
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#include <misc/byteorder.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Internal return code */
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#define ADC108S102_DONE (-1)
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/* 8 chans maximum + 1 dummy, 16 bits per-chans -> 18 bytes */
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#define ADC108S102_CMD_BUFFER_SIZE 9
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/* 1 dummy + 8 results maximum, 16 bits per-chans -> 18 bytes */
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#define ADC108S102_SAMPLING_BUFFER_SIZE 9
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#define ADC108S102_CHANNELS 8
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#define ADC108S102_CHANNELS_SIZE \
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(ADC108S102_CHANNELS * sizeof(u32_t))
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#define ADC108S102_CHANNEL_CMD(_channel_) \
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sys_cpu_to_be16((_channel_ << 8) << 3)
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#define ADC108S102_RESULT_MASK 0xfff /* 12 bits resolution */
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#define ADC108S102_RESULT(_res_) \
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(sys_be16_to_cpu(_res_) & ADC108S102_RESULT_MASK)
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struct ti_adc108s102_chan {
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u32_t buf_idx;
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};
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struct ti_adc108s102_data {
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u16_t cmd_buffer[ADC108S102_CMD_BUFFER_SIZE];
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u16_t sampling_buffer[ADC108S102_SAMPLING_BUFFER_SIZE];
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struct device *spi;
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struct spi_config spi_cfg;
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struct ti_adc108s102_chan chans[ADC108S102_CHANNELS];
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struct adc_seq_table *seq_table;
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u8_t cmd_buf_len;
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u8_t sampling_buf_len;
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u8_t stride[2];
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /* ZEPHYR_DRIVERS_ADC_ADC_TI_ADC108S102_H_ */
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