I have a PiTFT touchscreen and which I have it onto Raspberry Pi 3, I want some other peripherals attached as well but the screen occupies all the raspberry pins. Is it possible to reduce the pins needed by the screen, or even use some other protocol such as DSI?
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What kind of peripherals do you want to connect? What is stopping you from using the USB ports?– Darth Vader ♦Commented Nov 15, 2016 at 19:17
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1most TFTs I've seen/used only use a fraction of the GPIO pins. The rest are labelled as "NC" (or no connect). If you separate the Pi from the screen, you can connect just the non-NC pins up (the schematic for the TFT will show which ones are non-NC), and the rest are now available for other uses.– steviebCommented Nov 15, 2016 at 19:27
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1 Answer
The PiTFT does not use all GPIO pins, the 40 pin connector is merely for physical stability and ease of use. Some PiTFTs even have another 40 pin GPIO connector in order to easily allow for more GPIO peripherals. You might want to get one of those.
Using DSI instead of the GPIO would be hard, as you would have to write your own drivers (and might need custom made driver boards as well). The Raspberry Pi Foundation allowed some insight on these issues when they introduced their 7" display.
answered Nov 15, 2016 at 19:00
