0

2.8" tft cap. touch versions problems
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

2.8" tft cap. touch versions problems

by Jonaczt on Tue Sep 17, 2019 6:18 pm

HI,

My company recently purchased new stock of adafru.com/product/1947. However, when we attached the new ones to the MKR ZERO board and it didn't do anything other than turn on the backlight. When I use the Arduino UNO the projects run normally. So, I took a look and found that IOREF must be shorted with 3V pin. Nevertheless, it still no working.

When I used the version v. 2.3 the display worked!!! Additionally, I can not find a version number on the new display board.

I was wondering if this would be a hardware or software issue?

Thanks

Jonaczt
 
Posts: 1
Joined: Tue Sep 17, 2019 6:01 pm

Re: 2.8" tft cap. touch versions problems

by mikeysklar on Tue Sep 17, 2019 7:59 pm

Hello Jonaczt,

We have had quite a few posts recently on this topic. Please let me know if this solution also works for you. I do not know where the version number of the board is located.

viewtopic.php?f=47&t=148262&p=771877&hilit=2.8+tft+mkr#p771877

This version (Adafru~1) has the 2X3 header as a default to use SCK, MOSI and MISO pins, while the older version (v2.3) had those pins already connected to the peripheral single row pins.

Therefore, for the latest version I did this: (refer schematic ADAFRU~1 2019-09-17 10:57AM):

    Connected the pin closest to the pin 3 of MIC5225-3.3, to 3.3V (since I am using MKR Zero)
    Left the pin IOREF/VCCIO open
    Left the adjacent 3V pin open
    Soldered together all three positions of IOREF
    Closed SJ1, Closed SJ2, Closed SJ3

mikeysklar
 
Posts: 177
Joined: Mon Aug 01, 2016 8:10 pm

Please be positive and constructive with your questions and comments.