Interestingly enough, the LEONv3 architecture also underlies the SkyTraq Venus8 GPS/GNSS chips, which are in the Navspark arduino-compatible modules, which means there's a really, really accessible toolchain for 'em. Just add the board support URL to the IDE, and voila, you're building for LEON.
The NavSpark Mini is still $36 for a 6-pack, making it one of the cheapest uCs with a floating-point unit. (The ESP32 technically has one, but its performance is inexplicably poor.)
I'm not clear on whether SkyTraq's chips have all the error-correcting goodies that're in other LEON implementations; would those be baked in by default?
The NavSpark Mini is still $36 for a 6-pack, making it one of the cheapest uCs with a floating-point unit. (The ESP32 technically has one, but its performance is inexplicably poor.)
I'm not clear on whether SkyTraq's chips have all the error-correcting goodies that're in other LEON implementations; would those be baked in by default?