kedei 3.5 inch spi tft lcd driver pricelist
However, Googling around I have found that some people were able to compile and install kernel drivers and it seems that some drivers are available from here: http://kedei.net/raspberry/raspberry.html
Now what happens... main HDMI screen cets coloured in four colors (red-yellow-blue-cyan), but SPI display started working. It shown four raspberry logos and a bunch of text, which ends with this line:
I also have one of these displays ("vision 1.0" ... damn they could not even spell version right in their first try), and I once tried the full image given by kedei ... it worked, but I was very sceptical, and finally I worked on some other projects.
If kedei is not giving any open source driver, then someone has to reverse-engineer the whole thing and write an open source driver on his/their own ...
That"s a very sensible approach - try and keep away from displays that need a custom OS in order to work. The tinylcd displays, at least the 3.5inch one anyway, have a fbtft overlay available by default in Raspbian - see for yourself in the /boot/overlays/ directory. You"ll still need to do other configurations, like console redirection, etc.
When surfing for information on 3.5 ” TFT touchscreens for the Raspberry Pi,to improve the TinyLCD experience, I stumbled upon AliExpress where several shops offer a 3.5″ LCD TFT Touch Screen Display for incredible low prices.
Update June 2016: There is now a download/information page at http://osoyoo.com/driver/rpiscreen.php. Images for more versions (mine i 2.0, latest is 6.2) are available there. Alternative ishttp://kedei.net/raspberry/raspberry.html with Kali Ubuntu drivers too for version 3.0 and up.
The archive contains an image of Raspbian with the LCD driver installed. The image is quite current, and fit for B, B+ or 2 B. When I bought the screen an older image, build in augustus 2015, was downloadable, the kernel is quite fresh built, early October 2015.
The image supplied is wheezy, 3.18.9-v7 #27 SMP PREEMPT Sun Oct 4 23:57:41 CST 2015 armv7l. So quite a recent system! Also the Model 1 B and B+ kernel is present, also just current wheezy.
The system uses SPI to copy the screen contents to the LCD screen, and some GPIO’s for the touchscreen. Other GPIOs are free, and the connector construction leaves these pins indeed accessible!
I had in plans to create a custom driver but I decided this is not worth my time. I"m going to "re-interface" this lcd to be supported by fbtft. I have a prototype pcb with fbtft-spi interface ready (I have to send this project to pcb prototype service).
Unfortunatly, because of my "spider-circuit" I"ve broken my lcd (I"ve made a some short