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Message #27936

Sunnyalex

From: Germany

Posts: 8

Hi guys,

I have built a board with four 7-segment digits (i.e. it could display 0000 to 9999).
I used MAX7219 for this.

Unfortunately, it appears I have misinterpreted the way Mobiflight uses the chip.

I hope still with configuration/variable transformation my issue can be solved.

It would be great if someone could give me a hint.

The trouble, as I believe now, is like this:
In the schematic, I connected digits 0 ... 3 of the MAX7219.
However, digit 0 for me is the left-most on my real physical instrument.
So when you look at it, you see DIG0-DIG1-DIG2-DIG3.

In MobiFlight, module configuration I selected output type = LedModule, Num = 1.

I have played with a lot of options in the display settings field.

Currently I have the following options configured:

Number of digits: 8
use display: all 8 boxes checked
Extended: reverse digits

When I hit test, the display shows "1234".

Still, when I configure a game variable to be displayed, I only see the 9th, 10th, 11th, 12th digit of the signal. The digits 1 ... 8 of the simulator signal are "clipped" off. It is, as if MobiFlight expects another MAX7219 with another set of 8 digits to be connected.

Is there a way to configure MobiFlight for my use case?

Thank you and best regards,
Alex

2023-07-21 10:51

Message #27939

Sunnyalex

From: Germany

Posts: 8

I think I have it working now!

Settings are now:

number of digits: 4 (as I do have only four digits)
use left padding: yes (fill with blanks)
use digits: all 4 boxes checked
extended: reverse digits

AND: additionally in the interpolation settings, I enabled a linear interpolation. 0 -> 0; 1024 -> 1024. This converts the (float?) number to an integer. This integer is now shown correctly.

2023-07-21 19:51