56 lines
1,019 B
C++
56 lines
1,019 B
C++
#include <Arduino.h>
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#include <avr/cpufunc.h>
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#include <avr/pgmspace.h>
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#include "font.h"
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const int width = 120;
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const int lines = 7;
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const int line_pins[7] = { 2, 3, 4, 5, 6, 7, 8 };
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// Shift register needs to use raw AVR
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// B1 is clock
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// B2 is data
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void shiftout(uint8_t bit)
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{
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PORTB = bit << 2;
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PORTB |= 0x02;
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PORTB = 0;
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}
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void setup()
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{
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for (uint8_t i = 2; i <= 10; i++) {
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pinMode(i, OUTPUT);
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}
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pinMode(13, OUTPUT);
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}
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char *message = "Hello world! ";
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void loop()
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{
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for (uint8_t y = 0; y < lines; y++) {
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uint8_t letter = 0;
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uint8_t lettercol = 0;
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for (uint8_t x = 0; x < width; x++) {
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if (lettercol == 5) {
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lettercol = 0;
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letter++;
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shiftout(0);
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} else {
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uint8_t col = pgm_read_byte_near(&font_5x7_col[message[letter]][lettercol]);
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uint8_t bit = (col & (1 << y)) ? 1 : 0;
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shiftout(bit);
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lettercol++;
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}
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}
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digitalWrite(13, 1);
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digitalWrite(line_pins[y], 1);
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delayMicroseconds(200);
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digitalWrite(13, 0);
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digitalWrite(line_pins[y], 0);
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}
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}
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