3 digit 7 segment display works on UNO but displaying jibberish using ATTiny2313

[septillion]

The PDF in reply #11

[PaulRB]

Ah, sorry, I missed that!

It won't open on my phone. Will try on pc later.

[hahobson]

http://codeandlife.com/2012/02/24/7-segment-multiplexing-with-uln2003-pnp-transistors/

Wondering if this code could be helpful

[PaulRB]

Your original code is good. It worked on the Uno. You just have the wiring wrong because the pins are different on the attiny.

Use this diagram to help you check. Its the blue Arduino pin numbers that you need to get right in your sketch.


Compare them to the pin numbers on these lines:

Code: [Select]

//  mapping segment DP,G,F,E,D,C,B,A  data pin
const int segmentPins[8]         = { 7,6,5,4,3,2,1,0 };
//  mapping digit 1,2,3  data pin, skip pin 13 on board LED
const int digitPins[nbrDigits]   = { 8,9,10 };


If they don't match up, either change the numbers in the arrays, or change the physical wiring to match.

[hahobson]

Your original code is good. It worked on the Uno. You just have the wiring wrong because the pins are different on the attiny.

Use this diagram to help you check. Its the blue Arduino pin numbers that you need to get right in your sketch.


Compare them to the pin numbers on these lines:

Code: [Select]

//  mapping segment DP,G,F,E,D,C,B,A  data pin
const int segmentPins[8]         = { 7,6,5,4,3,2,1,0 };
//  mapping digit 1,2,3  data pin, skip pin 13 on board LED
const int digitPins[nbrDigits]   = { 8,9,10 };


If they don't match up, either change the numbers in the arrays, or change the physical wiring to match.

Thank you !   I will look into it and report back. 

[hahobson]

The problem still persists. 

[septillion]

Then you still do it wrong...

Did you do what I suggested in reply #13? No photo is read as "No, I did not".

[hahobson]

We are using a PCB.  Please see attached

[septillion]

Then don't... Grab a perfboard or breadboard and get the concept working...

[PaulRB]

We are using a PCB.  Please see attached

What is your role in the team, exactly? Did you design that PCB? I suspect not. So where is the person who designed that PCB? And why have they stopped helping you and left you to to flounder?

The problem still persists. 

Looking at your PCB layout and comparing that to your code, I can immediately see at least one major mistake. So look into it again, this time with a little more determination please.

[Smajdalf]

It looks like you are not using interrupts on the port expander and use it for inputs only. Why not using a shift register instead? Will probably be cheaper.