v.0.0.2 number_to_bitarray_msb

lib/LedMatrix/src/LedMatrix.cpp

@@ -21,12 +21,16 @@ void LedMatrix::drawPixel(int x, int y, CRGB color)
 
 void LedMatrix::drawChar(int x, int y, char c, CRGB color)
 {
+    u_int8_t char_width_pixel = getCharWidth(c);
+    // Serial.printf("Char '%c' -> width %d\n\r", c, char_width_pixel);
+
     const uint8_t *fontData = getFontChar(c);
     for (int row = 0; row < 7; row++)
     {
         uint8_t line = fontData[row];
-        for (int col = 0; col < 5; col++)
+        for (int col = 0; col < 5 /*char_width_pixel*/; col++)
         {
+            drawPixel(x + col, y + row, CRGB::SlateGrey);
             if (line & (1 << (4 - col)))
             {
                 drawPixel(x + col, y + row, color);
@@ -35,17 +39,60 @@ void LedMatrix::drawChar(int x, int y, char c, CRGB color)
     }
 }
 
+void LedMatrix::_drawChar_(int x, int y, char c, CRGB color)
+{
+    u_int8_t char_width_pixel = getCharWidth(c);
+    // Serial.printf("Char '%c' -> width %d\n\r", c, char_width_pixel);
+
+    const uint8_t *fontData = getFontChar(c);
+    for (int row = 0; row < 7; row++)
+    {
+        uint8_t line = fontData[row];
+        for (int col = 5 - char_width_pixel; col < 5; col++)
+        {
+            drawPixel(x + col, y + row, CRGB::SlateGrey);
+            if (line & (1 << (4 - col)))
+            {
+                drawPixel(x + col, y + row, CRGB::GhostWhite);
+            }
+        }
+    }
+}
+
 // Draw text string
 void LedMatrix::drawText(int x, int y, const char *text, CRGB color)
 {
     int cursorX = x;
     for (int i = 0; text[i] != '\0'; i++)
     {
-        u_int8_t w = getCharWidth(text[i]);
-        // Debug output
-        Serial.printf("Char %d: '%c' -> width %d at X=%d\n\r",
-                      i, text[i], w, cursorX);
         drawChar(cursorX, y, text[i], color);
+        _drawChar_(cursorX, 8 + y, text[i], color);
         cursorX += 6; // 5 pixels width + 1 pixel spacing
     }
 }
+
+vector<uint8_t> LedMatrix::number_to_bitarray_msb(uint16_t number, int bits)
+{
+    /** Convert 8/16-bit number to bit array (MSB first) */
+    std::vector<uint8_t> byte;
+    byte.reserve(bits);
+
+    for (int i = bits - 1; i >= 0; i--)
+    {
+        byte.push_back((number >> i) & 1);
+    }
+
+    // Debug, Ausgabe des Bytes
+    Serial.printf("0x%02X\n\r", number);
+    uint8_t idx = 0;
+    for (auto bit : byte)
+    {
+        Serial.printf("%d", bit);
+        idx++;
+        if (!(idx % 4))
+            Serial.printf(" ");
+    }
+    Serial.println();
+
+    return byte;
+}

lib/LedMatrix/src/LedMatrix.h

@@ -26,8 +26,11 @@ public:
 
     void drawPixel(int x, int y, CRGB color);
     void drawChar(int x, int y, char c, CRGB color);
+    void _drawChar_(int x, int y, char c, CRGB color);
     // Draw text string
     void drawText(int x, int y, const char *text, CRGB color);
+
+    vector<uint8_t> number_to_bitarray_msb(uint16_t number, int bits = 8);
 };
 
 #endif