71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/* adc-ti-adc108s102.h - Private */
|
|
|
|
/*
|
|
* Copyright (c) 2015 Intel Corporation
|
|
*
|
|
* Licensed 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 __ADC108S102_PRIV_H__
|
|
#define __ADC108S102_PRIV_H__
|
|
|
|
#include <spi.h>
|
|
#include <adc.h>
|
|
|
|
#include <misc/byteorder.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Internal return code */
|
|
#define ADC108S102_DONE (-1)
|
|
/* 8 chans maximum + 1 dummy, 16 bits per-chans -> 18 bytes */
|
|
#define ADC108S102_CMD_BUFFER_SIZE 9
|
|
/* 1 dummy + 8 results maximum, 16 bits per-chans -> 18 bytes */
|
|
#define ADC108S102_SAMPLING_BUFFER_SIZE 9
|
|
#define ADC108S102_CHANNELS 8
|
|
#define ADC108S102_CHANNELS_SIZE \
|
|
(ADC108S102_CHANNELS * sizeof(uint32_t))
|
|
#define ADC108S102_CHANNEL_CMD(_channel_) \
|
|
sys_cpu_to_be16((_channel_ << 8) << 3)
|
|
#define ADC108S102_RESULT_MASK 0xfff /* 12 bits resolution */
|
|
#define ADC108S102_RESULT(_res_) \
|
|
(sys_be16_to_cpu(_res_) & ADC108S102_RESULT_MASK)
|
|
|
|
struct ti_adc108s102_config {
|
|
const char *spi_port;
|
|
uint32_t spi_config_flags;
|
|
uint32_t spi_freq;
|
|
uint32_t spi_slave;
|
|
};
|
|
|
|
struct ti_adc108s102_chan {
|
|
uint32_t buf_idx;
|
|
};
|
|
|
|
struct ti_adc108s102_data {
|
|
uint16_t cmd_buffer[ADC108S102_CMD_BUFFER_SIZE];
|
|
uint8_t cmd_buf_len;
|
|
uint16_t sampling_buffer[ADC108S102_SAMPLING_BUFFER_SIZE];
|
|
uint8_t sampling_buf_len;
|
|
struct device *spi;
|
|
struct ti_adc108s102_chan chans[ADC108S102_CHANNELS];
|
|
struct adc_seq_table *seq_table;
|
|
};
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __ADC108S102_PRIV_H__ */
|