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[LiteX+HDMI2USB] Improve NuttX on LiteX generated SoC & replace HDMI2USB bare metal firmware #42

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mithro opened this issue Mar 9, 2017 · 0 comments

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@mithro mithro commented Mar 9, 2017

[LiteX+HDMI2USB] Improve NuttX on LiteX generated SoC & replace HDMI2USB bare metal firmware

Brief explanation

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.

Expected results

All current HDMI2USB based functionality now works with a firmware running NuttX rather than bare metal C code.

Detailed Explanation

The HDMI2USB-misoc-firmware embeds a LM32 soft-core for controlling and configuring the hardware. See the diagram below;

MiSoC firmware structure

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.

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@mithro mithro changed the title [LiteX] Port NuttX to LiteX generated SoC & replace HDMI2USB bare metal firmware [LiteX] Improve NuttX on LiteX generated SoC & replace HDMI2USB bare metal firmware Mar 9, 2017
@mithro mithro changed the title [LiteX] Improve NuttX on LiteX generated SoC & replace HDMI2USB bare metal firmware [LiteX+HDMI2USB] Improve NuttX on LiteX generated SoC & replace HDMI2USB bare metal firmware Mar 9, 2017
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