113 lines
3 KiB
Arduino
113 lines
3 KiB
Arduino
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// Display differences in 5x7 fonts.
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#include <SPI.h>
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#include "SSD1306Ascii.h"
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#include "SSD1306AsciiSpi.h"
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// pin definitions
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#define CS_PIN 7
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#define RST_PIN 8
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#define DC_PIN 9
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SSD1306AsciiSpi oled;
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const char* fontName[] = {
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"Adafruit5x7",
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"font5x7",
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"lcd5x7",
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"System5x7"
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};
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const uint8_t* fontList[] = {
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Adafruit5x7,
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font5x7,
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lcd5x7,
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System5x7
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};
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const uint8_t nFont = sizeof(fontList)/sizeof(const char*);
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//------------------------------------------------------------------------------
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// Assume fonts start with ' ' and have 96 chars
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void checkFont(const uint8_t* font, const char* name) {
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if (pgm_read_byte(font++) ||
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pgm_read_byte(font++) ||
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pgm_read_byte(font++) != 5 ||
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pgm_read_byte(font++) != 7 ||
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pgm_read_byte(font++) != ' ' ||
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pgm_read_byte(font++) < 96) {
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oled.clear();
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oled.print("Bad: ");
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oled.print(name);
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while(1);
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}
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}
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//------------------------------------------------------------------------------
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void cmp5x7Fonts(const uint8_t* font1, const char* name1,
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const uint8_t* font2, const char* name2) {
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uint8_t diff[96];
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uint8_t nDiff = 0;
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uint8_t w = 5;
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for (uint8_t i = 0; i < 96; i++) {
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const uint8_t* base1 = font1 + i*w + 6;
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const uint8_t* base2 = font2 + i*w + 6;
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for (uint8_t j = 0; j < w; j++) {
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uint8_t b1 = pgm_read_byte(base1 + j);
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uint8_t b2 = pgm_read_byte(base2 + j);
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if (b1 != b2) {
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diff[nDiff++] = ' ' + i;
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break;
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}
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}
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}
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oled.clear();
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delay(200);
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oled.setFont(font1);
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oled.print(name1);
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oled.setCol(78);
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oled.print("nDiff ");
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oled.println(nDiff);
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oled.setFont(font2);
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oled.println(name2);
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const uint8_t lineCount = 21;
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if (nDiff > 3*lineCount) nDiff = 3*lineCount;
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for (uint8_t i = 0; i < nDiff; i += lineCount) {
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oled.setFont(font1);
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for (uint8_t j = 0; j < lineCount && (j + i) < nDiff; j++) {
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oled.write(diff[i + j]);
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}
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oled.println();
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oled.setFont(font2);
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uint8_t nc = (nDiff - i) > lineCount ? lineCount : nDiff - i;
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for (uint8_t j = 0; j < nc; j++) {
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oled.write(diff[i + j]);
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}
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oled.println();
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}
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delay(2000 + 500*nDiff);
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}
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//------------------------------------------------------------------------------
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void setup() {
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// Use next line if no RST_PIN or reset is not required.
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// oled.begin(&Adafruit128x64, CS_PIN, DC_PIN);
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oled.begin(&Adafruit128x64, CS_PIN, DC_PIN, RST_PIN);
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oled.setFont(Adafruit5x7);
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oled.clear();
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oled.print("Start");
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checkFont(Stang5x7, "Stang5x7");
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for (uint8_t i = 0; i < nFont; i++) {
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checkFont(fontList[i], fontName[i]);
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}
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for (uint8_t i = 0; i < nFont; i++) {
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for (uint8_t j = i + 1; j < nFont; j++) {
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cmp5x7Fonts(fontList[i], fontName[i], fontList[j], fontName[j]);
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}
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}
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// System5x7 derived from Stang5x7?
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cmp5x7Fonts(Stang5x7, "Stang5x7", System5x7, "System5x7");
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oled.print("\nDone");
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}
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//------------------------------------------------------------------------------
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void loop() {}
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