the Apalis TK1 module include an NXP K20 IC for expanding some GPIOs and Analog inputs (and USB and I2C). The K20 is connected to the Tegra K1 over SPI.
I want to know how I can defined and controll the GPIOs of the K20 over command line on LINUX?
I have try to use these as normal GPIOs like on your page: http://developer.toradex.com/knowledge-base/using-k20-companion-mcu-on-apalis-tk1#GPIO but this wasn’t working…(see my question: can't use K20 gpios on version v2.7b1 on TK1 - Toradex Community )
Maybe it’s possible to communicate over SPI commands? (if yes, I need an instruction with SPI commands for that)
Maybe the K20 needs an driver which must be loaded at first? (if yes, I need an instruction for loading the K20 driver on LINUX)
Thanks for your help and BR