Inverted pulses to led matrix
Posted: Wed Oct 20, 2010 7:27 am
Okay so i just got done building the 8x8 game system and i noticed a few problems. Ive only uploaded pong onto it for right now.
The problem is it looks like the 8bits being sent to the display are inverted like instead 11110011 it comes out as 00001100 i think.
The first picture is what the screen should look like and the second picture is what it looks like right now.
Im thinking it has something to do with the difference between brads newer 8x8 schematic and the older one. I have a feeling that inorder to make the newer 8x8 game system schematic work is by changing the code so that the 8bits are sent inverted to the 74373's. But i could be completely wrong.
Can someone please help me out and tell me why this is happening.
The problem is it looks like the 8bits being sent to the display are inverted like instead 11110011 it comes out as 00001100 i think.
The first picture is what the screen should look like and the second picture is what it looks like right now.
Im thinking it has something to do with the difference between brads newer 8x8 schematic and the older one. I have a feeling that inorder to make the newer 8x8 game system schematic work is by changing the code so that the 8bits are sent inverted to the 74373's. But i could be completely wrong.
Can someone please help me out and tell me why this is happening.