Senior Member
Joined: 06/04/2018
Location: United KingdomPosts: 142
| Posted: 11:45am 05 Sep 2023 |
I have a result of sorts. With a separate 3.3v supply to feed the TFT, I still had the problem but I noticed if I disconnected the separate 3v3 the TFT was still lit but very dim. So the backlight was still drawing current from the armmite through the SSD1963 chip. To fix this I re-configured the TFT to "always on" for backlight and supplied the separate 3v3 to the LED-A pin. Now the TFT works fine with touch enabled.
I still have one tiny problem, GUI calibrate shows on screen and T-IRQ drops when screen touched but the test doesn't progress (stays on first test point). Will check touch wiring next.
Trevor