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I have 5x 7-segment display, help me

 
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leflau42



Joined: 18 Sep 2017
Posts: 2

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I have 5x 7-segment display, help me
PostPosted: Mon Sep 18, 2017 2:46 am     Reply with quote

I have 5x 7-segment display and i want to this to display in order active.

Example:

Data = 1 // Active First digit
data = 10 // active second digit
data=100 // active thirth digit
data=1000 // active fourth digit
data=10000 // active fifth digit

How can I do that ?

I want do 0-99999 counter application.

I am sorry for bad english.
temtronic



Joined: 01 Jul 2010
Posts: 5755
Location: Greensville,Ontario

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PostPosted: Mon Sep 18, 2017 5:10 am     Reply with quote

Good place to start is here !! Learn to use the 'search' function of this website. There are LOTS of 'threads' about creating an LED multiplex display program.

Some comments..
1) the 'refresh' rate( speed of the overall loop) needs to be 50Hz or faster. Too slow and you'll see the segments change.

2) be careful selecting LED current. A 'multiplex' display needs more current than a 'static' one,so you'll need transistor drivers for each display.

Jay
Ttelmah



Joined: 11 Mar 2010
Posts: 12516

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PostPosted: Mon Sep 18, 2017 5:57 am     Reply with quote

and (of course), there is an example for a 2 digit display supplied with the compiler (EX_LED.C).

Like all programming, you need to subdivide.

Start by driving one display. Then how to multiplex and do two. This is then easy to expand to do five.

The splitting of the counter number into digits, is only a matter of repeated /10 operations. Look at ldiv, which gives you the quotient and remainder. Remarkably useful for this....
leflau42



Joined: 18 Sep 2017
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PostPosted: Mon Oct 02, 2017 12:54 am     Reply with quote

Thank you guys i solved the problem
Ttelmah



Joined: 11 Mar 2010
Posts: 12516

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PostPosted: Mon Oct 02, 2017 2:28 am     Reply with quote

Well done. Smile
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