87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
#include <stdint.h>
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#include <ssd1306xled.h>
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#include "counter.h"
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void handleCounterScreen()
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{
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drawCounter(counter);
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}
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void drawCounter(uint16_t value)
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{
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if (value > 999) value = 999;
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uint8_t column = DigitFullOffset;
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if (value < 10)
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{
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// Single digit, blank left and right (prevents flicker)
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blankDigitColumn(&column, SpacingLeft1);
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drawDigit(&column, value);
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blankDigitColumn(&column, SpacingRight1);
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}
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else if (value < 100)
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{
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// Two digits, similar but also blank the spacing
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blankDigitColumn(&column, SpacingLeft2);
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drawDigit(&column, value / 10);
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blankDigitColumn(&column, DigitSpacing);
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drawDigit(&column, value % 10);
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blankDigitColumn(&column, SpacingRight2);
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}
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else
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{
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// Three digits, you know the drill by now
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drawDigit(&column, value / 100);
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blankDigitColumn(&column, DigitSpacing);
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drawDigit(&column, (value % 100) / 10);
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blankDigitColumn(&column, DigitSpacing);
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drawDigit(&column, value % 10);
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}
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}
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void drawDigit(uint8_t* column, uint8_t digit)
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{
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if (digit > 9) return;
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uint8_t yEnd = DigitPage + DigitRows;
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uint16_t bitmapOffset = digit * DigitBytesPerChar;
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for (uint8_t y = DigitPage; y < yEnd; y++)
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{
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ssd1306_setpos(*column, y);
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ssd1306_send_data_start();
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for (uint8_t x = 0; x < DigitWidth; x++)
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{
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ssd1306_send_byte(pgm_read_byte(&Digits[bitmapOffset]));
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bitmapOffset++;
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}
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ssd1306_send_data_stop();
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}
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(*column) += DigitWidth;
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}
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void blankDigitColumn(uint8_t* column, uint8_t width)
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{
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uint8_t yEnd = DigitPage + DigitRows;
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for (uint8_t y = DigitPage; y < yEnd; y++)
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{
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ssd1306_setpos(*column, y);
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ssd1306_send_data_start();
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for (uint8_t i = 0; i < width; i++)
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ssd1306_send_byte(0);
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ssd1306_send_data_stop();
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}
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(*column) += width;
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} |