BRT Community

Has there ever been a solution to this problem? Is there any answer from bridgetek?

Hi,

Do I understand the datasheet of the BT815 correctly: When the bt815 has only power, but is never activated (PD_N is never pulled HIGH), then the INT_N pin follows the interrupt of the capacitive screen?
Or do I have to set BT815 to active state, do some settings and when I go back to powerdown state, then I get this behaviour?

The datasheet says in 4.8.8.:

QuoteFor capacitive touch, the INT_N pin will follow CTP_INT_N pin when the BT815 is in STANDBY, SLEEP or
POWERDOWN state.

EDIT:
I got it running and it is just like the docs says.
In case you work with a esp32 -> Keep in mind that you need to configure the RTC-pin for the wakeup from deep-sleep right before the deep-sleep command.

Hi,

I have a project where some displays are with goodix touch controller and some are with FocalTech touch controller.
Is it possible that the BT815 figures out which controller is used by itself?

Best
Jonathan

Hey,

that would be great!
I use style 0 and 3 spinners.

Best
Jonathan

Hi,

is there a way to make the spinner widget smaller than the widget allows?
CMD_SPINNER(204, 283, 0, 0) in this command 0 is the smallest value for the scale, but I want it to be even smaller. Is there a way to do this or do I have to build my own spinner?

Best
Jonathan

Hey,

I am wokring with an BT815 and want to port the code generated from the ESD to esp32-s3 (at least I want to try). I have studied the AN_73 (porting guide for stm32) and think I got a rough overview how the porting could work with esp32-s3.
Hay anyone done this already?

Best
Jonathan

Thank you very much! This helps a lot!

I think there is no application note on how to port a screen designer project to the esp-idf like the one for stm32, right?

Best
Jonathan

Hey,

I would be also interested in the section about EVE3/EVE4 & ESP32 (ESP-IDF core). Could you please send me these files?
We are working with FreeRTOS, since the esp-idf is build on that. So I found this AN:

BRT_AN_073 - ESD 4.10 Exported Project Porting Guide for STM32L4 Discovery Board and FreeRTOS https://brtchip.com/wp-content/uploads/sites/3/2022/02/BRT_AN_073-ESD4.10.pdf

If i get this correct there is a way to set up the Screen Designer and my project to work together, thus I create my GUI in the designer and can compile it from the esp-idf, right?

Best
Jonathan

Hello,

is there a way to get the length of a text in pixel?
For example:
I am creating a custom button with text on it and I want the button width to be calculated automatically according to the given text input. Since some letters are bigger than others two words with the same number of letters will have different lengths in pixel.
Example:
Banana
Isabel

Both have 6 letters but different lengths in pixels.

So I am wondering if there is a method to get the size in pixels of the text?

Best

Hello,

I have a question about the possibilities of the interrupt pin. I want that any touch event triggers the interrupt. Especially when the display is in power-down state. From the docs I get, that in power-down state my wanted behaviour should be default. But nothing happens, I get no interrupts at all. Where do I have to set up the interrupt in the eve3-code? (I am using Rudolphs library)
Also I test the ISR from my MCU with a random button as interrupt source and this part works just fine. When I power up the display and do the init process I also get 2 interrupts, why? I can not find the source for them...

Best,
Jonathan

Hey,

I am developing a small system which includes an 5 inch display with 800x480 resolution and based on a BT815. So my setup looks something like that:
MCU <-> BT815 <-> Display/Touchscreen
Now I am thinking about bigger displays with higher resolutions. So one way is to get an BT817, which can handle these resolutions. But would it also be possible to get an RGB-to-MIPI bridge an control higher resolutions? If yes, this would be a valid way to control for example 1080p displays with an BT815 which would be great.

On the other hand I am wondering how other MCUs are working like the stm32 ones. There are controllers, which have a MIPI interface directly. But I can not find display-controllers like the BT815 with MIPI interface and also no ready-to-use modules. Why is that so? Is it more common for tablets and stuff to have just a big MCU which can handle high resolution displays and not to split it up into a smaller MCU and a separate graphics controller?

Best
Jonathan