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Topics - karst.drenth

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General Discussion / Variables of type "cstring"

« on: February 15, 2024, 03:07:53 PM »

Hi,

For some projects, I need to have the Text property of an ESD_TextBox to be editable ( I need it a.o. for a OS_Keyboard )
I looked in the Keyboard example and saw the use of "cstring" there. As I wanted so be sure that each instance has it's own storage, I checked the generated code.

To my asthonisment, I saw that in the EVE_Header files "cstring" is just a typedef of "const char*" which in turn means, that I will be writing directly in "some" memory where the default value is kept

Is there anybody out there who can wake me up from this bad dream

I am probably missing something, but can't figure out what.

Greets and already thanks for an answer,
Karst

Discussion - EVE / Couple of ESD questions / remarks

« on: April 11, 2022, 11:18:03 AM »

Hi All,

Now that I got my new HAL going, I am speeding up the development of my App.

Some things cross my mind....

1) Does somebody have implemented an OSK ( On Screen Keyboard ) ? My App needs to enter alpha-numeric settings.

2) Is there an Editable TextBox somewhere ?

3) AFAICS, CMD_KEYS does not seem to be implemented in ESD, does somebody have an example how to bind this into ESD generated code ?

In the attachment, the OSK which I crafted in ESD. It's nice and probably would work. But... It generates an enormous display_list, so that it won't display

Greets and thnx in advance for any answer,

Karst

Discussion - EVE / How to create a new Host Platform (e.g. Arduino) for EVE Screen Designer

« on: November 22, 2021, 01:18:04 PM »

Hi All,

I am busy designing a custom board, Arduino MKRzero compatible, which hosts a BT815 to connect to a 480x480 display.

As I am very impressed and pleased with Screen Designer, I'd like to use it for my project.
But... it (of course) cannot generate code for an Arduino platform.

I already managed to define my display and a new "Host Platform"... logically SD will crash when I press the "generate & upload" button.

( see Attachments )

Is there more Info around how to do this ?

As for now my only feasible option looks like choosing RP2040 and manually editing the generated HAL files in my project directory

Greets,
Karst

New Member Introductions / New on the community, very interested in EVE

« on: November 19, 2021, 11:17:48 AM »

Hi All,

My name is Karst Drenth, working at Drenth Design & Consulting BV in the Netherlands.
The company offers design, development and consulting for the the model railroad industry. All three activities on Electronics, Model construction, Prototype Investigation and 3D Drawing.

My application of EVE will be using Atmel SAMD21 as MCU and BT815 as an EVE to create touch screen throttle and turnout controllers.

I intend to use EVE Screen Designer in combination with my home-brewed micro-kernel for ATSAMD21 devices, so my customer easily can extend the product ( by simply using the EVE SD ) once development is finished.

Greetz,
Karst