How can I get a 4-th SPI port on TX2?

Hi there,

I’m trying to figure out what’s the best way to get a fourth SPI port on Jetson TX2. It needs to be fast (40MHz I’ve been told).

I doubt that bit banging will get me anywhere closer to 40MHz, but has anyone played with GPIOs and measured how fast they can flip?

Thank you.

Without the data rate requirement, you could use an I2C to SPI bridge to add an additional port.

However at that bandwidth, you are probably in USB territory.

Thanks, dusty_nv.