I know that Raspberry Pi has two Chip Select(CS) pins CE0 and CE1 in its header. However when I look to GPIO pinout. I see that BCM 19,20,21 pins are related to second SPI bus.
Is there really a second SPI bus usable?
Is sharing MISO,MOSI,SCLK lines and seperating CS lines for per SPI slave proper way to connect multiple SPI slaves?