Bruno Levy

Lua Stack overflow

4

Under some circumstances, Graphite crashes with a Lua stack overflow. There may be an event handler that enters an infinite recursion. It happens after a looong time though. To reproduce,...

FuseSOC

1

Would be good to - make FemtoRV32 and the cores in RTL/DEVICES/ available through FuseSoc, - use other FuseSoc cores in FemtoSoc

FOMU: UART over USB

7

Add a UART to the FOMU (needs a USB core + UART over USB)

SDRAM

1

Develop a SDRAM controler 1) a small standalone project with a framebuffer and HDMI 2) map it in the address space of FemtoRV32 3) FemtoRV32 full access (code + data)...

UART restart

1

When unplugging and replugging a design with a UART, the UART no longer sends data to the virtual terminal. - observed on the IceStick - does not seem to happen...

Faster SPI flash controller

11

There is (a lot of) room for improvement in the SPI flash controller: - use a DDR block instead of freq/2 clock - use faster SPI modes - use dual...

Priviledged instruction set

1

1) fully implement instructions to manipulate the CSRs 2) two levels of privilege, ECALL and EBREAK, implement FEMTOS syscalls, SDCard file access and terminal. 3) three levels of privilege 4)...

Add a new GPIO peripheral, with up to 32 pins, two registers, one (W) to configure direction, and one (RW) to read/write values.

Develop an I2C driver for the M5Stack keyboard and for the Keyboard FeatherWing

Keyboard and mouse

2

Find a way of plugging a keyboard and a mouse (either USB, or PS/2 if USB is too complicated)