B4R Question How to display ascii characters above 127?

Erel

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• Jul 7, 2016

• #2

There is no chr keyword because it is not needed.

B4X:

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

 

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metheoneandonly

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• Jul 7, 2016

• #3

Thank you very much! It works!

 

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metheoneandonly

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• Jul 7, 2016

• #4

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

 

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Erel

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• Jul 7, 2016

• #5

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

 

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metheoneandonly

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• Jul 7, 2016

• #6

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

 

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Erel

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• Jul 7, 2016

• #7

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/

 

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metheoneandonly

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• Jul 7, 2016

• #8

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.

 

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metheoneandonly

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• Jul 7, 2016

• #9

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.

 

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rwblinn

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• Jul 11, 2016

• #10

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.

B4X:

public:
//~hide
LiquidCrystal_I2C* lcd;

Give a go...

 

Attachments

• b4rhowtoliquidcrystal_i2c.zip

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metheoneandonly

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• Jul 12, 2016

• #11

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!

 

Last edited: Jul 12, 2016

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