How to use MCP3008 in jetson nano

[KevinFFF]

@lululu991129

I used the test tool later to verified SPI loopback test . But I get the RX is all zero as below:

It seems your SPI loopback test is failed.
Please refer to Jetson Nano SPI Bus Not Working - #10 by KevinFFF to verify if you can receive the data you send correctly.