mirror of https://github.com/ArduPilot/ardupilot
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
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#ifndef __AP_HAL_RC_INPUT_H__
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#define __AP_HAL_RC_INPUT_H__
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#include "AP_HAL_Namespace.h"
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#define RC_INPUT_MIN_PULSEWIDTH 900
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#define RC_INPUT_MAX_PULSEWIDTH 2100
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class AP_HAL::RCInput {
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public:
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/**
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* Call init from the platform hal instance init, so that both the type of
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* the RCInput implementation and init argument (e.g. ISRRegistry) are
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* known to the programmer. (Its too difficult to describe this dependency
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* in the C++ type system.)
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*/
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virtual void init(void* implspecific) = 0;
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/**
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* Return true if there has been new input since the last read()
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* call. This call also clears the new_input flag, so once it
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* returns true it won't return true again until another frame is
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* received.
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*/
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virtual bool new_input() = 0;
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/**
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* Return the number of valid channels in the last read
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*/
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virtual uint8_t num_channels() = 0;
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/* Read a single channel at a time */
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virtual uint16_t read(uint8_t ch) = 0;
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/* Read an array of channels, return the valid count */
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virtual uint8_t read(uint16_t* periods, uint8_t len) = 0;
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/**
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* Overrides: these are really grody and don't belong here but we need
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* them at the moment to make the port work.
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* case v of:
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* v == -1 -> no change to this channel
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* v == 0 -> do not override this channel
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* v > 0 -> set v as override.
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*/
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/* set_overrides: array starts at ch 0, for len channels */
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virtual bool set_overrides(int16_t *overrides, uint8_t len) = 0;
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/* set_override: set just a specific channel */
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virtual bool set_override(uint8_t channel, int16_t override) = 0;
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/* clear_overrides: equivelant to setting all overrides to 0 */
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virtual void clear_overrides() = 0;
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};
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#endif // __AP_HAL_RC_INPUT_H__
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