I try to setup a SMU with Linduino and capacitive touchscreen (Adafruit 1947).https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/dc2591a.html
12V is the supply and J3 set as EXT.Unfortunately, my LCD shows just all white.Even with USB connected.
When I test the LCD alone with Linduino (Graphicstest), it functions without any problem.Over serial monitor I can see my commands are accepted and deployed when only Linduino and DC2591A are connected.
When I connect three and give e.g. LCD:DIS command, nothing happens. Still all white.
I suspect the sketchbook of DC2591A (Easy SMU Run) has not the driver completely.
Can it be true?
I found the solution (thanks to Analog Devices Support).Apperently this was caused by Arduino and Adafruit.One should connect(solder) the pads 13,12,11.They are marked as " SPI (old Ard) " on the backside of Adafruit 1947 PCB.
Thanks for posting the solution to this - much appreciated.