B4R Library u8gr and u8x8 library?

Hi, I am totally new to Arduino. But bought a LED matrix screen that uses a ST7920 sold locally. I found a library that appears to work with it, but I can't find it on B4R and this forum. Is there any way I can make a wrapper for it or someone can do so? Sorry if I failed to find it somehow. I did a search.

https://github.com/olikraus/u8g2/wiki/setup_tutorial

 

[Erel]

It should be quite simple to call this library with inline c. Start with running the Arduino IDE examples. Do they work?

 

[Tien Lee]

It should be quite simple to call this library with inline c. Start with running the Arduino IDE examples. Do they work?

Hi, thanks! I have everything working because I did have a background in microcontrollers although I haven't been doing any for the past 13 years after a change in career (I don't think arduino existed back then, we played with Atmel AVR microcontrollers in assembly language). I inlined a different code (from Jaycar's Christmas clock https://www.jaycar.com.au/Christmas-clock) because I bought the led screen from them and I have finally gotten text mode to work. Took me awhile to figure out about passing parameters to the inline code until I dug around the generated C files to find the methods associated with Object class... So then I figured that I could typecast from the void * from toPointer to char *. I still haven't figured out how to pass multiple parameters, but worked around it by sending a Byte and taking the lower 4 bits as x and upper 4 bits as y for setting the cursor. I am still working out how to get Graphics to work.

Just thought that this library seems to support many leds. Will it be wrapped for use in B4R?

 

[Erel]

I still haven't figured out how to pass multiple parameters,

You can use global variables: https://www.b4x.com/android/forum/threads/inline-c-c.65714/#content

 

[Laurent95]

Hi, I am totally new to Arduino. But bought a LED matrix screen that uses a ST7920 sold locally. I found a library that appears to work with it, but I can't find it on B4R and this forum. Is there any way I can make a wrapper for it or someone can do so? Sorry if I failed to find it somehow. I did a search.

https://github.com/olikraus/u8g2/wiki/setup_tutorial

Hello,

I know this post is a bit old, in case you didn't find an example who satisfy, you have one below with source i posted recently, it use u8g lib but that's the same author and it's easy to adapt at his new library u8g2 :
https://www.b4x.com/android/forum/threads/b4r-low-memory-µc-stay-alive.98964/

Cheers
Laurent

 

[aslaminho]

Start with running the Arduino IDE examples. Do they work?