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Author SHA1 Message Date
Sylvain Munaut 641ac1e3ef gateware: Switch to using Vex CPU 
It's a good ~ 3.5x faster than the PicoRV32 (in number of cycles),
which allows to shutdown the system clock more and reduce power
a bit as well.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2023-03-23 11:18:14 +01:00
Sylvain Munaut 119bc9fa1f gateware: Switch to using the _3 variant of system manager 
This alone seems to reduce by ~30% the power usage of the SoC
(when USB is off).

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2023-03-22 21:49:57 +01:00
Sylvain Munaut c85dc29b06 gateware: Initial import of the FPGA gateware 
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2023-03-11 23:54:12 +01:00