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segments.h
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138 lines (132 loc) · 4.2 KB
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// Copyright (c) 2020 Anton Semjonov
// Licensed under the MIT License
#pragma once
#include <Arduino.h>
#include "pinout.h"
//
// ---------- SEGMENTS ----------
//
// each digit needs exactly one byte where each bit
// is mapped to a particular segment anode:
// a
// Ad╶┐┌╴Ae ────
// Ac╶┐││┌╴Af f │ │
// Ab╶┐││││┌╴Ag │ g │ b
// Aa╶┐││││││┌╴Adp ❯❯ ────
// 0b00000000 e │ │
// │ │ c
// ────
// d ■ dp
void segments(const uint8_t c) {
digitalWrite(Aa, (1 << 7) & c);
digitalWrite(Ab, (1 << 6) & c);
digitalWrite(Ac, (1 << 5) & c);
digitalWrite(Ad, (1 << 4) & c);
digitalWrite(Ae, (1 << 3) & c);
digitalWrite(Af, (1 << 2) & c);
digitalWrite(Ag, (1 << 1) & c);
digitalWrite(Adp, (1 << 0) & c);
}
// character lookup for segment mapping
unsigned lookup(char ch) {
switch (ch) {
// numbers
case '0': return 0b11111100;
case '1': return 0b01100000;
case '2': return 0b11011010;
case '3': return 0b11110010;
case '4': return 0b01100110;
case '5': return 0b10110110;
case '6': return 0b10111110;
case '7': return 0b11100000;
case '8': return 0b11111110;
case '9': return 0b11110110;
// alphabet
case 'A': return 0b11101110;
case 'a': return lookup('A');
case 'B': return lookup('b');
case 'b': return 0b00111110;
case 'C': return 0b10011100;
case 'c': return 0b00011010;
case 'D': return lookup('d');
case 'd': return 0b01111010;
case 'E': return 0b10011110;
case 'e': return lookup('E');
case 'F': return 0b10001110;
case 'f': return lookup('F');
case 'G': return lookup('6');
case 'g': return lookup('9');
case 'H': return 0b01101110;
case 'h': return 0b00101110;
case 'I': return 0b00001100;
case 'i': return 0b00001000;
case 'J': return 0b01110000;
case 'j': return lookup('J');
case 'K': return lookup('k');
case 'k': return 0b10101110;
case 'L': return 0b00011100;
case 'l': return lookup('I'); // _ _
case 'M': return 0b11001100; // M + m = | || |
case 'm': return 0b11100100; // | |
case 'N': return lookup('n');
case 'n': return 0b00101010;
case 'O': return lookup('0');
case 'o': return 0b00111010;
case 'P': return 0b11001110;
case 'p': return lookup('P');
case 'Q': return lookup('q');
case 'q': return 0b11100110;
case 'R': return lookup('r');
case 'r': return 0b00001010;
case 'S': return 0b10110110;
case 's': return lookup('S');
case 'T': return lookup('t');
case 't': return 0b00011110;
case 'U': return 0b01111100;
case 'u': return 0b00111000;
case 'V': return lookup('U');
case 'v': return lookup('u');
case 'W': return 0b00111100; // like M + m
case 'w': return 0b01111000; //
case 'X': return lookup('H');
case 'x': return lookup('H');
case 'Y': return lookup('y');
case 'y': return 0b01110110;
case 'Z': return lookup('2');
case 'z': return lookup('2');
// symbols
case '.': return 0b00000001;
case '\'': return 0b00000100;
case '-': return 0b00000010;
case '_': return 0b00010000;
case '>': return 0b00110000;
case '<': return 0b00011000;
case '=': return 0b00010010;
case '~': return 0b10010010;
// empty be default
default: return 0;
}
}
//
// ---------- DIGITS ----------
//
// simple digit activator with a bitmask, left is LSB
//
// ┌╴fifth╶─────╴▯▯▯▯▮
// │┌╴fourth╶───╴▯▯▯▮▯
// ││┌╴third╶───╴▯▯▮▯▯
// │││┌╴second╶─╴▯▮▯▯▯
// ││││┌╴first╶─╴▮▯▯▯▯
// 0b00000
//
void digits(const uint8_t d) {
digitalWrite(C1, !((1 << 0) & d));
digitalWrite(C2, !((1 << 1) & d));
digitalWrite(C3, !((1 << 2) & d));
digitalWrite(C4, !((1 << 3) & d));
digitalWrite(C5, !((1 << 4) & d));
}
// wrapper for the above with zero-indexed integers
inline void digitn(const uint8_t d) {
digits(1 << d);
}