73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
/*
|
|
* GpioPinDecoderv2.h
|
|
*
|
|
* Created on: 22 îêò. 2019 ã.
|
|
* Author: user
|
|
*/
|
|
|
|
#ifndef SOURCE_DRIVER_GPIOPINDECODERV2_H_
|
|
#define SOURCE_DRIVER_GPIOPINDECODERV2_H_
|
|
|
|
#include "../peripheral/IGpio.hh"
|
|
|
|
#include "Demux.hh"
|
|
|
|
namespace driver {
|
|
|
|
class GpioPinDecoder_v2 {
|
|
public:
|
|
static const unsigned short num_pins = 16;
|
|
|
|
typedef unsigned short Id;
|
|
|
|
struct PinPack {
|
|
unsigned short pin[4];
|
|
};
|
|
|
|
GpioPinDecoder_v2( Demux & demux, unsigned short default_pin, PinPack pack );
|
|
|
|
peripheral::IGpio * grab( Id pin_id ) { return pin_mapping[pin_id] < num_pins ? &pins[pin_mapping[pin_id]] : nullptr; }
|
|
|
|
private:
|
|
Demux & demux;
|
|
const unsigned short default_pin;
|
|
|
|
Id select_pin_id = default_pin;
|
|
|
|
class PinOnDecoder : public peripheral::IGpio {
|
|
public:
|
|
PinOnDecoder( GpioPinDecoder_v2 * decoder, Id pin ) :
|
|
decoder(decoder), pin(pin) {}
|
|
|
|
PinOnDecoder() = default;
|
|
|
|
void set() override { decoder->select( pin ); }
|
|
|
|
void clear() override { decoder->deselect(); }
|
|
|
|
bool read() const override { return pin == decoder->get_active_pin(); }
|
|
|
|
void write(bool value) override { value ? set() : clear(); }
|
|
|
|
void toggle() override { }
|
|
|
|
private:
|
|
GpioPinDecoder_v2 * decoder = nullptr;
|
|
Id pin = 0xFFFF;
|
|
};
|
|
|
|
void select( GpioPinDecoder_v2::Id pin ) { demux.select( select_pin_id = pin ); }
|
|
|
|
void deselect() { demux.select( select_pin_id = default_pin ); }
|
|
|
|
Id get_active_pin() { return select_pin_id; }
|
|
|
|
PinOnDecoder pins[num_pins];
|
|
unsigned short pin_mapping[num_pins];
|
|
|
|
};
|
|
|
|
} /* namespace driver */
|
|
|
|
#endif /* SOURCE_DRIVER_GPIOPINDECODERV2_H_ */
|