B4R Question How to display ascii characters above 127?

[metheoneandonly]

Hello!

Like the title says, I want to display some characters with ascii code above the 127 on 16x2 LCD display, but I didn't found any function (like "chr()" in some other languages) to do it.

Please help!


Thanks in advance!

 

[Erel]

There is no chr keyword because it is not needed.

lcd.Write(Array As Byte(60, 70, 200))

 

[metheoneandonly]

Thank you very much! It works!

 

[metheoneandonly]

Is it possible to create custom character without using "RunNative" and #IF C statement block, i.e. using BASIC statements/functions only?

 

[Erel]

You can see the available methods here: https://www.b4x.com/b4r/help/rliquidcrystal.html

 

[metheoneandonly]

So it seems I must still use C to create custom character. Thank you very much for your answer.

 

[Erel]

There is a nice tool that you can use to generate the code: https://www.b4x.com/android/forum/threads/tool-lcd-char-maker.67908/

 

[metheoneandonly]

Thank you for your quick responses. Just tried this, but seems it does not work with I2C displays. Or maybe I'm not in enough to make it work.

 

[metheoneandonly]

Does anyone know how to make custom characters with I2C displays? An example Erel gave to me is fine, but it works with LCDs without I2C daughterboard. I have only I2C displays, because those take minimum required pins and are generally easier to use, but it seems the LiquidCristal_I2C library does not have all the methods as the LiquidCristal library. Correct me if I'm wrong.

 

[rwblinn]

Hi,

after receiving the LCD I2C, did a first test and indeed no special chars displayed using the rLiquidCrystal_I2C v1.01 library.
Have modified the rLiquidCrystal_I2C library (v1.02) and tested sucessfully. The example code and the modified library are attached.

Change made to the rLiquidCrystal_I2C library:
In rLiquidCrystal_I2C.h made LiquidCrystal_I2C* lcd public instead of private (like in rLiquidCrystal library), to be able to access createChar and Write in InlineC.

public:
//~hide
LiquidCrystal_I2C* lcd;

Give a go...

 

[metheoneandonly]

Yes, it works! Thank you very much!

One more thing: regardless of beta, I like B4R much more than original Arduino IDE, because all of boards I have (some Funduino UNO or so, Arduino Pro mini 5v 16 MHz and Arduino Due) seem to work fine. With original IDE I couldn't get Due to work as I expected, it always throws exceptions and errors because of incompatibility of libs with 32-bit CPU. With B4R I don't have such issues. I'm not yet so experienced to get the libs made for original IDE to the B4R, but as I see, it already has all I need for now. Thank you, Erel, and all people who know-how!