Sandro

It ought to be possible to have multiple devices on one SPI bus, provided you don't try to access more than one at a time (e.g. by having async display updates running and then reading your encoders); that is kind of the point of SPI having a /CS...

In my case, the SPI1 bus is also used by the display, and managed somewhere inside Adafruit_ILI9341.h library

Solved.. I din't notice, Adafruit_MCP23X17 has a specific function, which reads all 16 pins: uint16_t readGPIOAB(); I know this library, and I'd like to use it, because it seems very simple and essential but I've not been able to configure SPI1...

I googled "github MCP23S17 Arduino" and found this library, which seems to have what you want. I have used some of Rob's libraries and they work well. https://github.com/RobTillaart/MCP23S17

Oups, missed that. I used the MCP23017, I2C version.

Hi all, in my application I would connect n.6 MCP23S17 to my T4.1, with SPI1 bus, using these pins: CS1: 38 MISO1: 39 MOSI1: 26 SCK1: 27 The purpose is reading Encoders and pushbutton; here is a sample of my schematics: My requirement are: 1)...