dac.h

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/*
 * Copyright (c) 2020 Libre Solar Technologies GmbH
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 
#ifndef ZEPHYR_INCLUDE_DRIVERS_DAC_H_
#define ZEPHYR_INCLUDE_DRIVERS_DAC_H_
 
#include <zephyr/device.h>
 
#ifdef __cplusplus
extern "C" {
#endif


#define DAC_CHANNEL_BROADCAST   0xFF

struct dac_channel_cfg {
        uint8_t channel_id;
        uint8_t resolution;
        bool buffered: 1;
        bool internal: 1;
};

 
/*
 * Type definition of DAC API function for configuring a channel.
 * See dac_channel_setup() for argument descriptions.
 */
typedef int (*dac_api_channel_setup)(const struct device *dev,
                                     const struct dac_channel_cfg *channel_cfg);
 
/*
 * Type definition of DAC API function for setting a write request.
 * See dac_write_value() for argument descriptions.
 */
typedef int (*dac_api_write_value)(const struct device *dev,
                                    uint8_t channel, uint32_t value);
 
/*
 * DAC driver API
 *
 * This is the mandatory API any DAC driver needs to expose.
 */
__subsystem struct dac_driver_api {
        dac_api_channel_setup channel_setup;
        dac_api_write_value   write_value;
};


__syscall int dac_channel_setup(const struct device *dev,
                                const struct dac_channel_cfg *channel_cfg);
 
static inline int z_impl_dac_channel_setup(const struct device *dev,
                                           const struct dac_channel_cfg *channel_cfg)
{
        const struct dac_driver_api *api =
                                (const struct dac_driver_api *)dev->api;
 
        return api->channel_setup(dev, channel_cfg);
}

__syscall int dac_write_value(const struct device *dev, uint8_t channel,
                              uint32_t value);
 
static inline int z_impl_dac_write_value(const struct device *dev,
                                                uint8_t channel, uint32_t value)
{
        const struct dac_driver_api *api =
                                (const struct dac_driver_api *)dev->api;
 
        return api->write_value(dev, channel, value);
}

 
#ifdef __cplusplus
}
#endif
 
#include <zephyr/syscalls/dac.h>
 
#endif  /* ZEPHYR_INCLUDE_DRIVERS_DAC_H_ */