229 lines
6.3 KiB
C
229 lines
6.3 KiB
C
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/*
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* pins.h
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*
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* Lightweight macro implementation of AVR pin numbering for
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* accessing Atmel digital and analog pins.
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*
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* pin_mode(A1, OUTPUT);
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* digital_write(A1, HIGH);
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* pin_mode(A2, INPUT);
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* digital_read(A2);
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*
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* This file is based on the excellent ArduinoLite project by
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* Shikai Chen <csk@live.com>.
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*
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* http://code.google.com/p/arduino-lite/
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* http://www.csksoft.net/
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*
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* Copyright (c) 2010-2011 Shikai Chen, Mika Tuupola
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*
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* Licensed under the LGPL 2.1 license:
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* http://www.opensource.org/licenses/lgpl-2.1.php
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*/
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#ifndef PINS_H
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#define PINS_H
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#include <avr/sfr_defs.h>
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#include <avr/io.h>
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#include "arduino.h"
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#define HIGH 0x1
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#define LOW 0x0
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#define INPUT 0x0
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#define OUTPUT 0x1
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#define ENABLE 0x1
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#define DISABLE 0x0
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#define PIN_TO_PORT(x) PORT_AT_PIN_##x
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#define PIN_TO_MASK(x) MASK_AT_PIN_##x
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#define PORT_TO_DIRECTION_REGISTER(x) DIRECTION_REGISTER_AT_##x
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#define PORT_TO_OUTPUT_REGISTER(x) OUTPUT_REGISTER_AT_##x
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#define PORT_TO_INPUT_REGISTER(x) INPUT_REGISTER_AT_##x
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#ifdef PORTA
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#define DIRECTION_REGISTER_AT_PortA DDRA
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#define OUTPUT_REGISTER_AT_PortA PORTA
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#define INPUT_REGISTER_AT_PortA PINA
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#define PORT_AT_PIN_A0 PortA
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#define PORT_AT_PIN_A1 PortA
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#define PORT_AT_PIN_A2 PortA
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#define PORT_AT_PIN_A3 PortA
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#define PORT_AT_PIN_A4 PortA
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#define PORT_AT_PIN_A5 PortA
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#define PORT_AT_PIN_A6 PortA
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#define PORT_AT_PIN_A7 PortA
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#define MASK_AT_PIN_A0 _BV(0)
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#define MASK_AT_PIN_A1 _BV(1)
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#define MASK_AT_PIN_A2 _BV(2)
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#define MASK_AT_PIN_A3 _BV(3)
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#define MASK_AT_PIN_A4 _BV(4)
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#define MASK_AT_PIN_A5 _BV(5)
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#define MASK_AT_PIN_A6 _BV(6)
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#define MASK_AT_PIN_A7 _BV(7)
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#endif
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#ifdef PORTB
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#define DIRECTION_REGISTER_AT_PortB DDRB
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#define OUTPUT_REGISTER_AT_PortB PORTB
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#define INPUT_REGISTER_AT_PortB PINB
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#define PORT_AT_PIN_B0 PortB
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#define PORT_AT_PIN_B1 PortB
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#define PORT_AT_PIN_B2 PortB
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#define PORT_AT_PIN_B3 PortB
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#define PORT_AT_PIN_B4 PortB
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#define PORT_AT_PIN_B5 PortB
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#define PORT_AT_PIN_B6 PortB
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#define PORT_AT_PIN_B7 PortB
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#define MASK_AT_PIN_B0 _BV(0)
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#define MASK_AT_PIN_B1 _BV(1)
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#define MASK_AT_PIN_B2 _BV(2)
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#define MASK_AT_PIN_B3 _BV(3)
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#define MASK_AT_PIN_B4 _BV(4)
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#define MASK_AT_PIN_B5 _BV(5)
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#define MASK_AT_PIN_B6 _BV(6)
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#define MASK_AT_PIN_B7 _BV(7)
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#endif
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#ifdef PORTC
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#define DIRECTION_REGISTER_AT_PortC DDRC
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#define OUTPUT_REGISTER_AT_PortC PORTC
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#define INPUT_REGISTER_AT_PortC PINC
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#define PORT_AT_PIN_C0 PortC
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#define PORT_AT_PIN_C1 PortC
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#define PORT_AT_PIN_C2 PortC
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#define PORT_AT_PIN_C3 PortC
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#define PORT_AT_PIN_C4 PortC
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#define PORT_AT_PIN_C5 PortC
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#define PORT_AT_PIN_C6 PortC
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#define PORT_AT_PIN_C7 PortC
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#define MASK_AT_PIN_C0 _BV(0)
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#define MASK_AT_PIN_C1 _BV(1)
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#define MASK_AT_PIN_C2 _BV(2)
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#define MASK_AT_PIN_C3 _BV(3)
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#define MASK_AT_PIN_C4 _BV(4)
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#define MASK_AT_PIN_C5 _BV(5)
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#define MASK_AT_PIN_C6 _BV(6)
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#define MASK_AT_PIN_C7 _BV(7)
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#endif
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#ifdef PORTD
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#define DIRECTION_REGISTER_AT_PortD DDRD
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#define OUTPUT_REGISTER_AT_PortD PORTD
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#define INPUT_REGISTER_AT_PortD PIND
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#define PORT_AT_PIN_D0 PortD
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#define PORT_AT_PIN_D1 PortD
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#define PORT_AT_PIN_D2 PortD
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#define PORT_AT_PIN_D3 PortD
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#define PORT_AT_PIN_D4 PortD
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#define PORT_AT_PIN_D5 PortD
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#define PORT_AT_PIN_D6 PortD
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#define PORT_AT_PIN_D7 PortD
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#define MASK_AT_PIN_D0 _BV(0)
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#define MASK_AT_PIN_D1 _BV(1)
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#define MASK_AT_PIN_D2 _BV(2)
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#define MASK_AT_PIN_D3 _BV(3)
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#define MASK_AT_PIN_D4 _BV(4)
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#define MASK_AT_PIN_D5 _BV(5)
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#define MASK_AT_PIN_D6 _BV(6)
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#define MASK_AT_PIN_D7 _BV(7)
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#endif
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#ifdef PORTE
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#define DIRECTION_REGISTER_AT_PortE DDRE
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#define OUTPUT_REGISTER_AT_PortE PORTE
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#define INPUT_REGISTER_AT_PortE PINE
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#define PORT_AT_PIN_E0 PortE
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#define PORT_AT_PIN_E1 PortE
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#define PORT_AT_PIN_E2 PortE
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#define PORT_AT_PIN_E3 PortE
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#define PORT_AT_PIN_E4 PortE
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#define PORT_AT_PIN_E5 PortE
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#define PORT_AT_PIN_E6 PortE
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#define PORT_AT_PIN_E7 PortE
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#define MASK_AT_PIN_E0 _BV(0)
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#define MASK_AT_PIN_E1 _BV(1)
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#define MASK_AT_PIN_E2 _BV(2)
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#define MASK_AT_PIN_E3 _BV(3)
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#define MASK_AT_PIN_E4 _BV(4)
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#define MASK_AT_PIN_E5 _BV(5)
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#define MASK_AT_PIN_E6 _BV(6)
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#define MASK_AT_PIN_E7 _BV(7)
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#endif
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#ifdef PORTF
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#define DIRECTION_REGISTER_AT_PortF DDRF
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#define OUTPUT_REGISTER_AT_PortF PORTF
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#define INPUT_REGISTER_AT_PortF PINF
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#define PORT_AT_PIN_F0 PortF
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#define PORT_AT_PIN_F1 PortF
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#define PORT_AT_PIN_F2 PortF
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#define PORT_AT_PIN_F3 PortF
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#define PORT_AT_PIN_F4 PortF
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#define PORT_AT_PIN_F5 PortF
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#define PORT_AT_PIN_F6 PortF
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#define PORT_AT_PIN_F7 PortF
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#define MASK_AT_PIN_F0 _BV(0)
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#define MASK_AT_PIN_F1 _BV(1)
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#define MASK_AT_PIN_F2 _BV(2)
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#define MASK_AT_PIN_F3 _BV(3)
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#define MASK_AT_PIN_F4 _BV(4)
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#define MASK_AT_PIN_F5 _BV(5)
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#define MASK_AT_PIN_F6 _BV(6)
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#define MASK_AT_PIN_F7 _BV(7)
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#endif
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#define MERGE_TO_FUNC(prefix, id) prefix##_##id
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#define EXPAND_WRAPPER(NEXTLEVEL, ...) NEXTLEVEL(__VA_ARGS__)
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#define _SET_OUTPUT(port_id, msk) PORT_TO_DIRECTION_REGISTER(port_id) |= (msk)
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#define _SET_INPUT(port_id, msk) PORT_TO_DIRECTION_REGISTER(port_id) &= ~(msk)
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#define _DIGITAL_WRITE_HIGH(port_id, msk) PORT_TO_OUTPUT_REGISTER(port_id) |= (msk)
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#define _DIGITAL_WRITE_LOW(port_id, msk) PORT_TO_OUTPUT_REGISTER(port_id) &= ~(msk)
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#define _DIGITAL_READ_RAW(port_id, msk) ((PORT_TO_INPUT_REGISTER(port_id)) & (msk))
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#define _DIGITAL_READ(port_id, msk) (((PORT_TO_INPUT_REGISTER(port_id)) & (msk)) != 0 ? 1 : 0)
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#define _DIGITAL_TOGGLE(port_id, msk) PORT_TO_OUTPUT_REGISTER(port_id) ^= (msk)
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#define SET_1(pin) SET_OUTPUT(pin)
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#define SET_0(pin) SET_INPUT(pin)
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#define SET_0x1(pin) SET_OUTPUT(pin)
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#define SET_0x0(pin) SET_INPUT(pin)
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#define DIGITAL_WRITE_HIGH(pin) EXPAND_WRAPPER(_DIGITAL_WRITE_HIGH, PIN_TO_PORT(pin), PIN_TO_MASK(pin))
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#define DIGITAL_WRITE_LOW(pin) EXPAND_WRAPPER(_DIGITAL_WRITE_LOW, PIN_TO_PORT(pin), PIN_TO_MASK(pin))
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#define DIGITAL_WRITE_1(pin) DIGITAL_WRITE_HIGH(pin)
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#define DIGITAL_WRITE_0(pin) DIGITAL_WRITE_LOW(pin)
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#define DIGITAL_WRITE_0x1(pin) DIGITAL_WRITE_HIGH(pin)
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#define DIGITAL_WRITE_0x0(pin) DIGITAL_WRITE_LOW(pin)
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#define DIGITAL_WRITE_ENABLE(pin) DIGITAL_WRITE_HIGH(pin)
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#define DIGITAL_WRITE_DISABLE(pin) DIGITAL_WRITE_LOW(pin)
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#define SET_OUTPUT(pin) EXPAND_WRAPPER(_SET_OUTPUT, PIN_TO_PORT(pin), PIN_TO_MASK(pin))
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#define SET_INPUT(pin) EXPAND_WRAPPER(_SET_INPUT, PIN_TO_PORT(pin), PIN_TO_MASK(pin))
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#define pin_mode(pin, mode) SET_##mode(pin)
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#define pin_pullup(pin, val) DIGITAL_WRITE_##val(pin)
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#endif /* PINS_H */
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