I need to control 5 devices with the Arduino Due via SPI. I know what Due have only 3 SS pins to choose from. 4, 10 and 52. I try to go the other way. I took the port extender PCA9534 and try to use its ports as a CS for my SPI devices. I do not use standard CS pins. In the transfer, I set the PCA…

Arduino DUE SPI via PCA9534

Projects Networking, Protocols, and Devices

pylon October 30, 2017, 2:52pm 2

That code is just an excerpt, please post the complete sketch that shows the problem. I guess you haven't initialized the SPI channel (#3 in your case).

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Arduino DUE SPI via PCA9534

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