Comments on: Controlling graphical 128×64 LCD based on KS0108

By: Masoud Gheysari M

Masoud Gheysari M — Tue, 07 Feb 2012 20:33:17 +0000

Hello everybody,
Anyone who has a weird problem which his LCD does not work without any reason, should disable JTAG in his microcontroller fuses. It took me 2 days to discover!

By: avrlabcom

avrlabcom — Wed, 18 Jan 2012 13:23:42 +0000

http://avrlab.com/node/115 here is my code for WG12864A
I used it to make touchscreen project using WG12864 and touchscreen.

By: admin

admin — Mon, 10 Oct 2011 11:51:53 +0000

Thank you Markus for fix. You can also find working example for mega32 of fixed code here:
http://winavr.scienceprog.com/interfacing-rotary-encoder-to-atmega32

By: admin

admin — Wed, 31 Aug 2011 21:12:12 +0000

please send it to scienceprog [ at] gmail [dot]com

By: Markus

Markus — Sat, 27 Aug 2011 16:39:05 +0000

It seems that some of the shift operators messed up with the code tags. The code shown in the post will obviously not compile. Maybe it is possible to send the code to the moderator via email and she/he can provide a patch or change the downloadable code.

By: Markus

Markus — Wed, 17 Aug 2011 20:28:42 +0000

This should fix the problem that fonts which don’t have height % 8 == 0 will be displayed as a multiple of 8.
int ks0108PutChar(unsigned char c) { uint8_t width = 0; uint8_t height = ks0108FontRead(ks0108Font+FONT_HEIGHT); uint8_t bytes = (height+7)/8; uint8_t tooMuch = height % 8;


	uint8_t firstChar = ks0108FontRead(ks0108Font+FONT_FIRST_CHAR);

	uint8_t charCount = ks0108FontRead(ks0108Font+FONT_CHAR_COUNT);
	uint16_t index = 0;

	uint8_t x = ks0108Coord.x, y = ks0108Coord.y;
	if(c = (firstChar+charCount)) {

		return 1;

	}

	c-= firstChar;
	// read width data, to get the index

	for(uint8_t i=0; i
		index += ks0108FontRead(ks0108Font+FONT_WIDTH_TABLE+i);

	index = index*bytes+charCount+FONT_WIDTH_TABLE;

	width = ks0108FontRead(ks0108Font+FONT_WIDTH_TABLE+c);
	// last but not least, draw the character

	for(uint8_t i=0; i
	{

		uint8_t page = i*width;

		for(uint8_t j=0; j>= tooMuch;

				data |= dataOld;

			}
			if(ks0108FontColor == BLACK)

			{

				ks0108WriteData(data);

			} else

			{

				ks0108WriteData(~data);

			}

		}

		// 1px gap between chars

		if(ks0108FontColor == BLACK)

		{

			ks0108WriteData(0x00);

		}

		else

		{

			ks0108WriteData(0xFF);

		}

		if (i + 2 < bytes)

			ks0108GotoXY(x, ks0108Coord.y+8);

		else

			ks0108GotoXY(x, ks0108Coord.y + tooMuch);

	}

	ks0108GotoXY(x+width+1, y);

return 0; }

By: Fabio

Fabio — Fri, 08 Oct 2010 07:24:02 +0000

Hello all. I am beginner and I’m learning c. In the function ks0108DrawLine that I report here (derived from ks0108.C code of Maximilian library ) ,
can you show me where the data is written into the KS0108 memory ? I don’t understand how te struct work.
Can you help me?
Thanks .
Fabio

void ks0108DrawLine(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, uint8_t color) {
uint8_t length, i, y, yAlt, xTmp, yTmp;
int16_t m;

//
// vertical line
//
if(x1 == x2) {
// x1|y1 must be the upper point
if(y1 > y2) {
yTmp = y1;
y1 = y2;
y2 = yTmp;
}
ks0108DrawVertLine(x1, y1, y2-y1, color);

//
// horizontal line
//
} else if(y1 == y2) {
// x1|y1 must be the left point
if(x1 > x2) {
xTmp = x1;
x1 = x2;
x2 = xTmp;
}
ks0108DrawHoriLine(x1, y1, x2-x1, color);

//
// schiefe line
//
} else {
// angle >= 45°
if((y2-y1) >= (x2-x1) || (y1-y2) >= (x2-x1)) {
// x1 must be smaller than x2
if(x1 > x2) {
xTmp = x1;
yTmp = y1;
x1 = x2;
y1 = y2;
x2 = xTmp;
y2 = yTmp;
}

length = x2-x1; // not really the length
m = ((y2-y1)*200)/length;
yAlt = y1;

for(i=0; i= 100)
y++;
else if((m*i) 0 <= -100)
y–;

ks0108DrawLine(x1+i, yAlt, x1+i, y, color);

if(length <= (y2-y1) && y1 < y2)
yAlt = y+1;
else if(length y2)
yAlt = y-1;
else
yAlt = y;
}

// angle y2) {
xTmp = x1;
yTmp = y1;
x1 = x2;
y1 = y2;
x2 = xTmp;
y2 = yTmp;
}

length = y2-y1;
m = ((x2-x1)*200)/length;
yAlt = x1;

for(i=0; i= 100)
y++;
else if((m*i) 0 <= -100)
y–;

ks0108DrawLine(yAlt, y1+i, y, y1+i, color);
if(length <= (x2-x1) && x1 < x2)
yAlt = y+1;
else if(length x2)
yAlt = y-1;
else
yAlt = y;
}
}
}
}

By: LCD MODULE

LCD MODULE — Tue, 08 Jun 2010 08:27:16 +0000

thanks man, your article had help me a lot much.

By: Aoran-LCD

Aoran-LCD — Mon, 17 May 2010 09:54:49 +0000

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By: renato gallo

renato gallo — Tue, 20 Apr 2010 12:31:32 +0000

i would need a step by step pictures guide on how to wire it please can you help I beg you