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STM32F411CE Multiple SPI slaves, which CSs?

Question asked by silvergaucho on Oct 1, 2015
Latest reply on Oct 1, 2015 by silvergaucho
Dear all,

I have the following situation:
STM32F411CE with  PB12,PB13,PB14 and PB15 configured as SPI2 to interface with an external slave sensor.

SPI1 (PA4,PA5,PA6,PA7) is used for an external IMU communicating in SPI.

Now the problem is that I need to connect another device in SPI mode.
I was thinking to connect to the same SPI2 bus,
I canot use the other SPI busses.

So (the real question...) which pin can I use as CS for the external new device?
Can I use a normal GPIO?