Guru
Joined: 11/02/2018
Location: AustraliaPosts: 2246
| Posted: 12:01am 28 Nov 2022 |
Tested it with 1n4007, 1n914, 1n4148 and resistors from 3k3 to 10k.
All work with this test program.
https://www.thebackshed.com/forum/ViewTopic.php?FID=16&TID=11419&LastEntry=Y#194465#194465
Perhaps the touch chip was damaged if you connected it without a resistor or diode in series with LCD_SDO. When idle it is active low so when the touch T_DO goes high it is driving in to a very low resistance (about 40 ohms).
To test this remove the diode and resistor and leave LCD_SDO unconnected. Then try to calibrate touch. If touch won't work with nothing else sharing MISO it may be damaged.