The initial problem starts like this. There are 6 states. At each state when w=1 move to the next state, when w=0 then stay at the current state. At each state display a number using a standard 7 led display (BCD). Those numbers are 8 -> 1 -> 9 -> 4 -> 2 -> 2.
So here is my attempt at this problem. I start with a state table:
From left to right y2,y1,y0
w=0 w=1 a b c d e f g
000|000 001 1 1 1 1 1 1 1
001|001 010 0 1 1 0 0 0 0
010|010 011 1 1 1 1 0 1 1
011|011 100 0 1 1 0 0 1 1
100|100 101 1 1 0 1 1 0 1
101|101 000 1 1 0 1 1 0 1
Then Yo Y1 & Y2 equations are made using karnaugh maps
y1.y0 _ _
w.y2 00 01 11 10 Y0 = w.y0 + w.y0
00 0 1 1 0
01 0 1 d d
11 1 0 d d
10 1 0 0 1
y1.y0 _ _ _ _
w.y2 00 01 11 10 Y1 = w.y1 + w.y2.y1.y0 + w.y1.y0
00 0 0 1 1
01 0 0 d d
11 0 0 d d
10 0 1 0 1
y1.y0 _ _ _ _
w.y2 00 01 11 10 Y2 = w.y2 + y2.y1.y0 + w.y1.y0
00 0 0 0 0
01 1 1 d d
11 1 0 d d
10 0 0 1 0
Then the outputs need addition maps created.
Y1.Y0 _ _
Y2 00 01 11 10 a = Y2 + Y0.Y2
0 1 0 0 1
1 1 1 d d
Y1.Y0
Y2 00 01 11 10 b = 1
0 1 1 1 1
1 1 1 d d
Y1.Y0 _
Y2 00 01 11 10 c = Y2
0 1 1 1 1
1 0 0 d d
Y1.Y0 _ _
Y2 00 01 11 10 d = Y2 + Y0.Y2
0 1 0 0 1
1 1 1 d d
Y1.Y0 _ _ _
Y2 00 01 11 10 e = Y2 + Y0.Y1.Y2
0 1 0 0 0
1 1 1 d d
Y1.Y0 _ _
Y2 00 01 11 10 f = Y2.Y0 + Y1
0 1 0 1 1
1 0 0 d d
Y1.Y0 _ _
Y2 00 01 11 10 g = Y1 + Y2 + Y1.Y0
0 1 0 1 1
1 1 1 d d
Currently I am using a 3 bit D flip flop counter to create the 6 inputs.
The display shows.
_ _ _
|_| | |_| |_| |
|_| | _| | |_ _
Is there a mistake with the logic or is it possible that the counter could be creating this problem?
Typing out the entire question again assisted myself in figuring out the part that was done wrong.
The problem was in the Y2 Karnaugh Map.
By looking at the outputs I was able to see which pins were not working and trace them back to the source of the error.