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110 lines
3.0 KiB
110 lines
3.0 KiB
10 years ago
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#pragma once
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/**
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This file provides macros for pin manipulation.
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You can define your application pins like so:
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// Led at PORTB, pin 1
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#define LED B,1
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// Switch at PORTD, pin 7
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#define SW1 D,7
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Now you can use macros from this file to wirh with the pins, eg:
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as_output(LED);
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as_input(SW1);
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pullup_on(SW1);
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toggle_pin(LED);
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while (pin_is_low(SW1));
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- The macros io2XXX() can be used to get literal name of register associated with the pin.
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io2n() provides pin number.
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- The XXX_aux() macros are internal and should not be used elsewhere.
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- The io_pack() macro is used to pass pin (io) to other macro without expanding it.
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Additionaly, there's general-purpose bit-manipulation macros (set_bit, clear_bit etc.).
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Those work with register name and pin number, not the "io" format (#define LED2 D,3).
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*/
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#include <avr/io.h>
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#include "calc.h"
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// Get particular register associated with the name X (eg. D -> PORTD)
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#define reg_ddr(X) DDR ## X
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#define reg_port(X) PORT ## X
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#define reg_pin(X) PIN ## X
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#define io2ddr_aux(reg, bit) reg_ddr(reg)
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#define io2ddr(io) io2ddr_aux(io)
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#define io2port_aux(reg, bit) reg_port(reg)
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#define io2port(io) io2port_aux(io)
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#define io2pin_aux(reg, bit) reg_pin(reg)
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#define io2pin(io) io2pin_aux(io)
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#define io2n_aux(reg, bit) bit
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#define io2n(io) io2n_aux(io)
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#define io_pack(port, bit) port, bit
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// pointer to port
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typedef volatile uint8_t* PORT_P;
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// number of bit in port
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typedef uint8_t BIT_N;
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// === pin manipulation ===
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#define set_pin_aux(port, bit) set_bit(reg_port(port), bit)
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#define clear_pin_aux(port, bit) clear_bit(reg_port(port), bit)
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#define read_pin_aux(port, bit) read_bit(reg_pin(port), bit)
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#define write_pin_aux(port, bit, value) write_bit(reg_port(port), bit, value)
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#define toggle_pin_aux(port, bit) set_bit(reg_pin(port), bit)
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#define set_pin(io) set_pin_aux(io)
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#define pin_high(io) set_pin_aux(io)
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#define clear_pin(io) clear_pin_aux(io)
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#define pin_low(io) clear_pin_aux(io)
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#define read_pin(io) read_pin_aux(io)
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#define pin_is_low(io) !read_pin_aux(io)
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#define pin_is_high(io) read_pin_aux(io)
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#define write_pin(io, value) write_pin_aux(io, value)
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#define toggle_pin(io) toggle_pin_aux(io)
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// setting pin direction
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#define as_input_aux(port, bit) clear_bit(reg_ddr(port), bit)
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#define as_output_aux(port, bit) set_bit(reg_ddr(port), bit)
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#define set_dir_aux(port, bit, dir) write_bit(reg_ddr(port), bit, dir)
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#define as_input(io) as_input_aux(io)
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#define as_output(io) as_output_aux(io)
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#define set_dir(io, dir) set_dir_aux(io, dir)
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// setting pullup
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#define pullup_enable_aux(port, bit) set_bit(reg_port(port), bit)
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#define pullup_disable_aux(port, bit) clear_bit(reg_port(port), bit)
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#define set_pullup_aux(port, bit, on) write_bit(reg_port(port), bit, on)
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#define pullup_enable(io) pullup_enable_aux(io)
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#define pullup_on(io) pullup_enable_aux(io)
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#define pullup_disable(io) pullup_disable_aux(io)
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#define pullup_off(io) pullup_disable_aux(io)
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#define set_pullup(io, on) set_pullup_aux(io, on)
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