Troubles interfacing Round touchscreen to DRIVER IC and TEENSY 3.6

GOKO STUDIO

New member
Hi there!
I'm creating a MIDI keyboard with an embedded touchscreen.
It has been several months that we are trying to make this 2.1 inch round ST7701S capacitive touchscreen work on our Teensy3.6 + FT813

I previously used a TFT shield from Adafruit with the <ili9341_t3.h> and <Adafruit_STMPE610_teensy.h>
which worked well for early prototyping but now I need to prototype a design orientated version of my project
so I'm trying to assemble custom material together to create my own Custom PCB.

here you can see an image of the setup
Hardware-Setup.jpg


The project is already in an advanced stage.
We need TOUCHSCREEN and DRIVER debugging:
So we are able to connect it to our microcontroller.

Did anyone here had similar experiences ?
Do you have any recommendation ?
I can provide more info if needed, thanks :)

this is the previous prototype
Screenshot-2021-10-07-at-00.11.46.png

2.8 TFT Shield from adafruit
https://learn.adafruit.com/adafruit-2-8-and-3-2-color-tft-touchscreen-breakout-v2/downloads
 
little update:
Finally got it working using this driver:
https://github.com/blazer82/FT81x_Arduino_Driver

(plus a little of bitbanging on the SPI)

Since mk66fx1m0 is out of stock, we cannot assemble our own PCB
So we also managed to adapt the whole thing for Raspberry Pi Pico (RP2040)
For people having the same issue in the future we'll share wiring diagram and code really soon!
 
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