display things on LCD during boot up

EL Wire/Tape/Panels, LEDs, pixels and strips, LCDs and TFTs, etc products from Adafruit

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quamenzullo
 
Posts: 19
Joined: Thu May 15, 2014 11:42 am

display things on LCD during boot up

Post by quamenzullo »

Hello,

I would like to be able to display things on the LCD screen during bootup time of the raspberry pi.
I have found this script:

https://learn.adafruit.com/drive-a-16x2 ... nit-script

but it happens that the message appears very late, at the end of the startup. Might be because it is a python script and cannot be run earlier.

Is their a way to display something on the LCD that would show up much earlier, at the beginning of the startup?
(I use a 16x2 LCD on a kit: https://www.adafruit.com/products/1110)

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adafruit2
 
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Joined: Fri Mar 11, 2005 7:36 pm

Re: display things on LCD during boot up

Post by adafruit2 »

without compiling special modules for the kernel, not really. the system must 'come up' before you can run python since it uses the file system!

quamenzullo
 
Posts: 19
Joined: Thu May 15, 2014 11:42 am

Re: display things on LCD during boot up

Post by quamenzullo »

If there was a library written in shell script (bash or anything), would it be possible to get a significant progress compared to python?

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Franklin97355
 
Posts: 23910
Joined: Mon Apr 21, 2008 2:33 pm

Re: display things on LCD during boot up

Post by Franklin97355 »

This http://www.tldp.org/HOWTO/HighQuality-A ... /boot.html might shed some light on the process.

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