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

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

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.

2

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.

3

Thanks, dusty_nv.