125 lines
3 KiB
C++
125 lines
3 KiB
C++
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#include <Arduino.h>
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#include <EEPROM.h>
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#define ALPHABET_SIZE 37
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#define EEPROM_BASE 42
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// 6
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// 4 5
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// 3
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// 1 2
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// 0
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uint8_t dispMap[ALPHABET_SIZE+1] = { 0x00, 0x77, 0x24, 0x6b, 0x6d, 0x3c, 0x5d, 0x5f, 0x64, 0x7f, 0x7d, 0x7e, 0x1f, 0x53, 0x2f, 0x5b, 0x5a, 0x57, 0x1e, 0x12, 0x25, 0x3c, 0x13, 0x76, 0x0e, 0x0f, 0x7a, 0x7c, 0x0a, 0x55, 0x1b, 0x07, 0x37, 0x3f, 0x06, 0x3d, 0x63 };
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char charMap[ALPHABET_SIZE] = { ' ', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };
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uint8_t *pinMap;
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uint8_t state = 0;
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volatile bool advanceState = 0;
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volatile bool advanceDigit = 0;
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void nextState() {
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advanceState = true;
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}
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void cycleDigit() {
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advanceDigit = true;
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}
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void showDigit(char digit, bool dot) {
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// add 0 for SSID hexdump
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if (digit < 10) {
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digit += '0';
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} else if (digit < 16) {
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digit += 'A' - 10;
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}
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uint8_t output = 0x08;
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for (uint8_t i = 0; i < ALPHABET_SIZE; ++i) {
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if (charMap[i] == digit) {
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output = dispMap[i];
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break;
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}
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}
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if (dot) {
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output |= 0x80;
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}
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for (uint8_t i = 0; i < 8; ++i) {
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digitalWrite(pinMap[i], (output >> i) & 1);
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}
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}
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void loadFromEeprom(char *str, uint8_t len, uint8_t eeprom_base) {
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if (EEPROM.read(eeprom_base) != 0x42) {
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for (uint8_t i = 0; i < len; ++i) {
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EEPROM.update(eeprom_base+1+i, str[i]);
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}
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// Write EEPROM init flag last
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EEPROM.write(eeprom_base, 0x42);
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}
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for (uint8_t i = 0; i < len; ++i) {
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str[i] = EEPROM.read(eeprom_base+1+i);
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}
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}
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void clearDisplay() {
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showDigit(' ', false);
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}
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void display(char *str, uint8_t len) {
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for (uint8_t i = 0; i < len; ++i) {
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showDigit(str[i], false);
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delay(1000);
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}
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clearDisplay();
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}
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void editor(char *str, uint8_t len, uint16_t eeprom_base) {
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attachInterrupt(digitalPinToInterrupt(2), nextState, FALLING);
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attachInterrupt(digitalPinToInterrupt(3), cycleDigit, FALLING);
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while (true) {
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if (advanceDigit) {
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advanceDigit = false;
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if (str[state] < 16) {
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str[state] = (str[state] + 1) % 16;
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} else {
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for (uint8_t i = 0; i < ALPHABET_SIZE; ++i) {
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if (charMap[i] == str[state]) {
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str[state] = charMap[(i+1)%ALPHABET_SIZE];
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break;
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}
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}
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}
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}
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if (advanceState) {
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advanceState = false;
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state++;
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}
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if (state >= len) {
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for (uint8_t i = 0; i < len; ++i) {
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EEPROM.update(eeprom_base+1+i, str[i]);
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}
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display(str, len);
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return;
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} else {
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showDigit(str[state], true);
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}
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}
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}
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void initEditor(char *str, uint8_t len, uint16_t eeprom_base, uint8_t *initPinMap) {
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loadFromEeprom(str, len, eeprom_base);
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pinMap = initPinMap;
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for (uint8_t i = 0; i < 8; ++i) {
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pinMode(pinMap[i], OUTPUT);
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digitalWrite(pinMap[i], LOW);
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}
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pinMode(2, INPUT_PULLUP);
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pinMode(3, INPUT_PULLUP);
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delay(500);
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if (!digitalRead(2)) {
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while (!digitalRead(2));
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editor(str, len, eeprom_base);
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} else {
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display(str, len);
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}
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}
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