Led matrix and special characters

Projects Programming
1

Hi!

I have two green Sure 3208 modules wired up. I use the MilesBurton library and some code copied from can't-remember-where. I have everything else working properly, even got 5x8 fonts working, but I can't figure out how to display special characters, the ones I need are Ä and Ö. Here's the code involving the characters:

/*
 * Copy a character glyph from the myfont data structure to
 * display memory, with its upper left at the given coordinate
 * This is unoptimized and simply uses setPixel() to draw each dot.
 */
 
void drawChar(uint8_t x, uint8_t y, char c)
{
  uint8_t dots;
  
  if (c >= '!' && c <= '~') {
    c = (c - 32); // Fonts start from A, left ASCII commands out..
  }
  
 else if (c == 'Ä') { // Ä
    c = 99;
  }
  else if (c == 'Ö') { // Ö
  c = 97;
  }
  
  else if (c == ' ') {
    c = 0; // space
  }
  else c = 0;
  
  for (char col=0; col< 5; col++) {
    dots = pgm_read_byte_near(&myfont[c][col]);
    for (char row=0; row < 8 ; row++) {
      if (dots & (128>>row))  // Had a problem wit this, had to change (64>>row) to (128>>row) to get this to work with 5x8 fonts (orig. 5x7)
        toolbox.setPixel(x+col, y+row-1, 1); // Had to change this too, orig. toolbox.setPixel(x+col, y+row, 1);
      else 
        toolbox.setPixel(x+col, y+row-1, 0); // orig. toolbox.setPixel(x+col, y+row, 0);
    }
  }
}

// Write out an entire string (Null terminated)
void drawString(uint8_t x, uint8_t y, char* c)
{
	for(char i=0; i< strlen(c); i++)
	{
		drawChar(x, y, c[i]);
		x+=6; // Width of each glyph
	}
}

Any ideas?

2

Does the PROGMEM character table include the graphics for these characters?

3

Yep, it does.