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/**
* Marlin 3D Printer Firmware
* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
#pragma once
#include "Clock.h"
#include "../../../inc/MarlinConfigPre.h"
#include <stdint.h>
typedef int16_t pin_type;
struct GpioEvent {
enum Type {
NOP,
FALL,
RISE,
SET_VALUE,
SETM,
SETD
};
uint64_t timestamp;
pin_type pin_id;
GpioEvent::Type event;
GpioEvent(uint64_t timestamp, pin_type pin_id, GpioEvent::Type event){
this->timestamp = timestamp;
this->pin_id = pin_id;
this->event = event;
}
};
class IOLogger {
public:
virtual ~IOLogger(){};
virtual void log(GpioEvent ev) = 0;
};
class Peripheral {
public:
virtual ~Peripheral(){};
virtual void interrupt(GpioEvent ev) = 0;
virtual void update() = 0;
};
struct pin_data {
uint8_t dir;
uint8_t mode;
uint16_t value;
Peripheral* cb;
};
class Gpio {
public:
static const pin_type pin_count = 255;
static pin_data pin_map[pin_count+1];
static bool valid_pin(pin_type pin) {
return pin >= 0 && pin <= pin_count;
}
static void set(pin_type pin) {
set(pin, 1);
}
static void set(pin_type pin, uint16_t value) {
if (!valid_pin(pin)) return;
GpioEvent::Type evt_type = value > 1 ? GpioEvent::SET_VALUE : value > pin_map[pin].value ? GpioEvent::RISE : value < pin_map[pin].value ? GpioEvent::FALL : GpioEvent::NOP;
pin_map[pin].value = value;
GpioEvent evt(Clock::nanos(), pin, evt_type);
if (pin_map[pin].cb) {
pin_map[pin].cb->interrupt(evt);
}
if (Gpio::logger) Gpio::logger->log(evt);
}
static uint16_t get(pin_type pin) {
if (!valid_pin(pin)) return 0;
return pin_map[pin].value;
}
static void clear(pin_type pin) {
set(pin, 0);
}
static void setMode(pin_type pin, uint8_t value) {
if (!valid_pin(pin)) return;
pin_map[pin].mode = value;
GpioEvent evt(Clock::nanos(), pin, GpioEvent::Type::SETM);
if (pin_map[pin].cb) pin_map[pin].cb->interrupt(evt);
if (Gpio::logger) Gpio::logger->log(evt);
}
static uint8_t getMode(pin_type pin) {
if (!valid_pin(pin)) return 0;
return pin_map[pin].mode;
}
static void setDir(pin_type pin, uint8_t value) {
if (!valid_pin(pin)) return;
pin_map[pin].dir = value;
GpioEvent evt(Clock::nanos(), pin, GpioEvent::Type::SETD);
if (pin_map[pin].cb) pin_map[pin].cb->interrupt(evt);
if (Gpio::logger) Gpio::logger->log(evt);
}
static uint8_t getDir(pin_type pin) {
if (!valid_pin(pin)) return 0;
return pin_map[pin].dir;
}
static void attachPeripheral(pin_type pin, Peripheral* per) {
if (!valid_pin(pin)) return;
pin_map[pin].cb = per;
}
static void attachLogger(IOLogger* logger) {
Gpio::logger = logger;
}
private:
static IOLogger* logger;
};
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