Fastest way to dump data over USB

[mkimhj]

Hi,

I have a project where I am wirelessly streaming 16bit mic data at fs=50,000. I'm receiving that data on another nRF52840 dev board. I've ensured that the data doesn't get dropped over the BLE using 2Mbps.

Now my problem is that I'd like to stream that data to my computer over USB. I've set up USB CDC, and am just dumping the packets using the NRF_LOG_RAW_HEXDUMP_INFO macro. Unfortunately, I'm only able to stream about 7.5KB before I start to drop logs. Am I misunderstanding the throughput limitations of USB? I think I'm missing something fundamental here. 

What would be the most efficient way to stream data from an nRF52840 dev board to another machine? I need to support up to 1.6Mbps.

.

[mkimhj]

Hi, could I get an update on this from nordic?

[Heidi]

Hi, I'm looking into this but due to the holidays in Norway, we are very under-staffed in the Technical Support department this week so delays are to be expected on DevZone.

Best regards,

Heidi

[Heidi]

Hi!

It might be helpful for you to disable the NRF_LOG_DEFERRED option in sdk_config.h. The log buffer is usually processed in the main loop so logs can easily get dropped if the application is busy with other tasks.