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progmem error for LED array code

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Posted by Stanley   (1 post)  [Biography] bio
Date Wed 11 Mar 2020 06:51 PM (UTC)

I am trying to use the LED code:


Particularly for the 8x8 LED array. I have followed the instructions. but when it comes to including the cp437 font I get this error:

variable 'cp437_font' must be const in order to be put into read-only section by means of '__attribute__((progmem))'

Per the website I have the code written like this (the ..... is the rest of the callouts):

byte cp437_font [256] [8] PROGMEM = {
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // 0x00
}; // end of cp437_font

I am not sure how to proceed, This is my first LED attempt and all the other methods I have seen/tried have failed. The LED lights up sporadically. I have also tried a different driver and LED and no bueno.

I would appreciate any help. Also, I hope I am posting in the proper forum!

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Posted by Fiendish   USA  (2,513 posts)  [Biography] bio   Global Moderator
Date Reply #1 on Wed 11 Mar 2020 07:00 PM (UTC)

Amended on Wed 11 Mar 2020 07:01 PM (UTC) by Fiendish

Also, I hope I am posting in the proper forum!

You aren't
Template:Arduino Please post Arduino-related questions to the Arduino Forum or to StackExchange: Arduino. This saves splitting questions and answers between this forum and the Arduino ones.

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