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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 "i2s.h"
/**
* Utility functions
*/
// I2S expander pin mapping.
#define IS_I2S_EXPANDER_PIN(IO) TEST(IO, 7)
#define I2S_EXPANDER_PIN_INDEX(IO) (IO & 0x7F)
// Set pin as input
#define _SET_INPUT(IO) pinMode(IO, INPUT)
// Set pin as output
#define _SET_OUTPUT(IO) pinMode(IO, OUTPUT)
// Set pin as input with pullup mode
#define _PULLUP(IO, v) pinMode(IO, v ? INPUT_PULLUP : INPUT)
// Read a pin wrapper
#define READ(IO) (IS_I2S_EXPANDER_PIN(IO) ? i2s_state(I2S_EXPANDER_PIN_INDEX(IO)) : digitalRead(IO))
// Write to a pin wrapper
#define WRITE(IO, v) (IS_I2S_EXPANDER_PIN(IO) ? i2s_write(I2S_EXPANDER_PIN_INDEX(IO), v) : digitalWrite(IO, v))
// Set pin as input wrapper
#define SET_INPUT(IO) _SET_INPUT(IO)
// Set pin as input with pullup wrapper
#define SET_INPUT_PULLUP(IO) do{ _SET_INPUT(IO); _PULLUP(IO, HIGH); }while(0)
// Set pin as input with pulldown (substitution)
#define SET_INPUT_PULLDOWN SET_INPUT
// Set pin as output wrapper
#define SET_OUTPUT(IO) do{ _SET_OUTPUT(IO); }while(0)
// Set pin as PWM
#define SET_PWM SET_OUTPUT
// Set pin as output and init
#define OUT_WRITE(IO,V) do{ _SET_OUTPUT(IO); WRITE(IO,V); }while(0)
// digitalRead/Write wrappers
#define extDigitalRead(IO) digitalRead(IO)
#define extDigitalWrite(IO,V) digitalWrite(IO,V)
// PWM outputs
#define PWM_PIN(P) (P < 34 || P > 127) // NOTE Pins >= 34 are input only on ESP32, so they can't be used for output.
// Toggle pin value
#define TOGGLE(IO) WRITE(IO, !READ(IO))
//
// Ports and functions
//
// UART
#define RXD 3
#define TXD 1
// TWI (I2C)
#define SCL 5
#define SDA 4
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