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Linux/PROCESSOR-SDK-AM335X: Use of GPIO pins as Chip select for SPI

kumuda M
Prodigy 250 points
Part Number: PROCESSOR-SDK-AM335X


Tool/software: Linux

HI,

I want to use 16 SPI Slaves for Beaglebone Black currently it is supporting for only 4 spi slaves(4 Chip select pin (GPIO_CS) working .

how to use 16 Chip select pins and how many slaves is supported by beaglebone back spi ?

Regards

KUMUDA

  • 0
    Guru 13660 points

    Hi Kumuda,

    There are two instances of McSPI (McSPI0 and McSPI1), each master instance can support 4 slaves(2 by chip select and 2 by GPIO). So total of 8 slaves can be connected. 

    If you need more, explore the option of Daisy Chaining. The slaves should support it.