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[LiteX+HDMI2USB] Improve NuttX on LiteX generated SoC & replace HDMI2USB bare metal firmware #42
[LiteX+HDMI2USB] Improve NuttX on LiteX generated SoC & replace HDMI2USB bare metal firmware
The HDMI2USB project uses "bare metal" firmware running on a soft CPU inside the FPGA. We would like to replace this code with something running on a proper operating system to make it easier to add new features. NuttX is one such option for a lightweight OS.
All current HDMI2USB based functionality now works with a firmware running NuttX rather than bare metal C code.
The HDMI2USB-misoc-firmware embeds a LM32 soft-core for controlling and configuring the hardware. See the diagram below;
This soft-core should be able to run NuttX. NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint.
A bunch of work has been done on making NuttX work on LiteX.