drv_adc.h

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/****************************************************************************
 *
 *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
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 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
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#pragma once

#include <stdint.h>
#include <sys/ioctl.h>

/* Define the PX4 low level format ADC and the maximum
 * number of channels that can be returned by a lowlevel
 * ADC driver. Drivers may return less than PX4_MAX_ADC_CHANNELS
 * but no more than PX4_MAX_ADC_CHANNELS.
 *
 */
#define PX4_MAX_ADC_CHANNELS 12
typedef struct __attribute__((packed)) px4_adc_msg_t {
    uint8_t      am_channel;               /* The 8-bit ADC Channel */
    int32_t      am_data;                  /* ADC convert result (4 bytes) */
} px4_adc_msg_t;


#define ADC0_DEVICE_PATH    "/dev/adc0"

/*
 * ioctl definitions
 */