I need to focus on my additional project in PHP. That means Doton and GfxLCD lib must wait but we will use this time to upgrade ProxyLCD project.
What is ProxyLCD? It is remote LCD that works on NodeMCU, stand alone desktop app in Python and Symfony’s bundle.
Bundle listens to dump() command and when a dump is called it parse object or array to a string, connects to an app and sends it. App gets this content and sends it to added remote LCDs.
Finally, something that is missing from the start, the ability to write some text on display. In Doton we needed an ability to display numbers and we have done it via images. It was a partial solution but good enough. But we want more 🙂
So this time fonts, text and another step in endless struggle with displaying anything anywhere 🙂
We can rotate both ILI displays but NJU and SSD are awaiting their turn. Let’s give them some attention and add rotation to them.
This will close another task on endless list of improvements 🙂
From what I see we should change drawing functions (recalculate coordinates) and flushing buffer should stay the same because it works directly on hardware.
We have tests for page drawing algorithm. We can move on and add tests for area one. Writing tests for area drawing is much harder. This mode works on the device directly.
We need to create a dummy driver and chip class in such way that it would translate device’s command to an array. (more…)
We need tests for GfxLCD and we need it now! But this is a driver so what can we test? W can and must test all drawing functions. We have two algorithms the page and the area. Let’ begin with page one.
We can mock a chip class in such way that it won’t use a driver and all drawing would go to a buffer and we always can check if buffer looks as we want.
We have a driver for ILI9486 320×480 display and we can run Doton on it. But currently, it would use only half of the screen. Our window manager has hard-coded dimension 240×320.
We need to do something with it. I think we can update manager to calculate grid from dimensions and additionally we can add tiles auto positioning.
Why? Because it seems that not setting position on the screen can be better 🙂 System can add pages when required and take care of horizontal vs vertical position.
But I think that we should be able to set coords if we want to.
Last time we ignored a touch panel. But without it, our Waveshare shield is half-functional. So let’s do something about it: )
We have an XPT2046 panel that is compatible with AD7843 and it is compatible with AD7846 🙂 XPT has additionally a pressure sensor.
Recently I bought an LCD 4″ IPS with an ILI9486 chip from Waveshare. It should be better than 2.8″ 🙂 In instruction states that this display can work as system screen and I thought that maybe we can use PyQt or something instead of a custom driver.
The idea died quickly. I tried to run it on Raspberry Pi Zero W and this is not trivial 🙂 First, I hit the bug with inability to use GPIO #17 and driver couldn’t be loaded. After some googling, I know that this is caused by the newest kernel. So I reverted to old one and… screen booted up but WiFi and Bluetooth did not.
So this way is no go. Back to the original idea and custom driver for ILI9486. (more…)