Interesting New Raspberry Pi SDR Shield

[softerh...@gmail.com]

Hi Group,

I recently saw this upcoming Raspberry Pi SDR shield:

https://www.crowdsupply.com/cariboulabs/cariboulite

It uses the Rasbperry Pi's secondary memory interface for higher bandwidth, something I always wanted to try.

"The 4MSPS I/Q samples (both Tx and Rx) are transmitted over the RPI’s secondary memory interface, where CaribouLite acts as a high throughput memory peripheral."

The IQ samples are each at least 13bit/13bit, so at 4MSPS they must be realizing 26*4 = just over 100 Mbs. 

The project is fully open source:

https://github.com/cariboulabs/cariboulite

Maybe the RadioBerry could leverage and reuse this existing work on the secondary memory interface? The github page says bandwidths of up to 500 Mbs are possible on some RPis.

73,

Steve

kf7o

[pa3gsb]

Hi Steve,

Indeed real nice development. I also did look at the SMI interface ; but i decided in the process of higher sample rates and lower cpu utilization to go for the juice board also enabling the possiblity to use different SBC/PC

Connecting SMI to Radioberry board some hw mods are required ; for a next iteration of radioberry i will do these mods to get connected to SMI.

I will keep a close eye to cariboulabs development. 

Thanks for sharing!

73 Johan

PA3GSB

Op woensdag 16 juni 2021 om 19:01:16 UTC+2 schreef softerh...@gmail.com: