mirror of https://github.com/ArduPilot/ardupilot
51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
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#ifndef __AP_ANALOG_SOURCE_ARDUINO_H__
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#define __AP_ANALOG_SOURCE_ARDUINO_H__
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#include "AnalogSource.h"
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#include "AP_PeriodicProcess.h"
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// special pin number which is interpreted as a
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// internal Vcc voltage read
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#define ANALOG_PIN_VCC 254
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#define ANALOG_PIN_NONE 255
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class AP_AnalogSource_Arduino : public AP_AnalogSource
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{
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public:
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AP_AnalogSource_Arduino( uint8_t pin, float prescale = 1.0 ) :
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_prescale(prescale) {
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_assign_pin_index(pin);
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}
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// setup the timer callback
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static void init_timer(AP_PeriodicProcess * scheduler);
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// read a value with a prescale
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float read(void);
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// read the raw 16 bit ADC value
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uint16_t read_raw(void);
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// read a Vcc value in millivolts
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uint16_t read_vcc(void);
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// read the average 16 bit ADC value since
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// we last called read_average().
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float read_average(void);
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// set the pin to be used for this source. This allows for the pin
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// to be changed at runtime
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void set_pin(uint8_t pin);
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private:
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uint8_t _pin_index;
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float _prescale;
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uint8_t _remap_pin(uint8_t pin);
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void _assign_pin_index(uint8_t pin);
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};
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#endif // __AP_ANALOG_SOURCE_ARDUINO_H__
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