Hey everyone, I'm trying to set up an open smart 2.0 TFT with an Uno, but haven't had any luck. The part i have is from some Chinese supplier, so the item description referred to one driver (S6D1121), but the PCB is printed with another (ST7775). The description says it uses the UTFT library, and I've found the st7775 driver, but not the other, and that's where my understanding ends so far.
Also, I know these screens are 3.3v, and I'm using an uno, but I've also purchased a level shifter (I need like 13, and only bought one with 5 or 8, but have another in the mail for the remainder, once I know how to use it).
Thanks!
Yes, it should work fine with 13 level shifters.
It would have been a lot easier to just buy a Uno clone with switchable 3.3V logic.
Then you don't need any level shifters. And the Uno clone is probably cheaper than buying 13 level shifters and extra connecting wires.
I support ILI9225, ILI9226, ST7775 with MCUFRIEND_kbv. If you have a different controller, please let me know.
David.
Ohh, alright. I have a clone which may have switchable logic, but im not sure how to tell (aside from trying to get ahold of a reference manual, which I may or may not already have), so let me look into that then I'll let you know.
I've used your library for another touch shield (an mcufriend) with your help as well, I just wasn't sure how to find the pin locations and/or appropriate constructors through the UTFT library (which I'd guess yours may be a bit easier to locate them), so I'll look back in that as well and let you know. Thanks!
Just quote any model name or number on your clone board.
Google will probably find a photo or link of the pcb.
Seeeduino has a 3.3V / 5V slide switch near the power jack.
Infiduino has a 3.3V / 5V slide switch.
Sainsmart has a 3.3V / 5V slide switch.
Others might have a 3.3V / 5V male header. You select with a jumper.
Seriously. Level shifters are painful. Not unreasonable for one-way traffic e.g. an SPI Master.
Bidirectional pins e.g. a data bus needs TSX0108 or similar. 74HC050 style only work one-way.
An 8-bit bidirectional can use 74VHC245 buffers but you need a direction pin.
David.