Tag: howto

First Steps with the Longan Nano RISC-V Development Board

The Longan Nano is a new contestor in the area of affordable RISC-V development boards. The Longan Nano’s form factor and price puts it up against the Arduino Nano and all other varieties of STM32-based “nano boards”, which can be found abundantly on Ebay and AliExpress.

Undelete Files with SnapRAID

Today I accidentally deleted a whole folder of important documents on my OpenMediaVault(OMV) NAS, while doing some cleaning up.
Of course I would have a backup of the folder on an external hard-drive, but this was the perfect opportunity to test SnapRAID.

Getting Started with GHDL

If you haven’t heard of GHDL, it is *the* free open-source VHDL simulator out there.
GHDL stand for “G Hardware Description Language” (the G is without meaning). GHDL is mainly implemented in Ada and can be build with different backends: mcode, LLVM and GCC. The different backends provide different performance levels and vary in build complexity. I recommend LLVM since it performs well and is still quite straight forward to build. Building GHDL from latest sources from its github project is probably the best way to go.

Despite its free nature GHDL provides very good support for all major VHDL-LRM releases: VHDL-1987/1993/200X/2008(partial). Unfortunately GHDL is a pure VHDL simulator, so there is no support for Verilog at all. This is understandable as there are already some very good simulators for Verilog out there.

USBasp driver for Windows 10

In the past I used USBtiny and USBasp programmers to flash Atmel microcontrollers. Under Windows 10 the programmers did not work, even though Windows 10 seemed to detect them correctly.
It turns out Windows 10 does not use/fetch the correct drivers.
To make things work again most folk use Zadig a tool which automatically installs some legacy drivers typically used for USB programmer dongles.

USB driver installation with Zadig

After the drivers are installed Windows 10 finally detects my USBasp programmer dongle as it should.

References:
[1] https://rayshobby.net/dead-simple-driver-installation-for-usbasp-and-usbtiny-on-windows/
[2] https://zadig.akeo.ie

Anlogic TANG PriMER dev board

Recently I purchased a Sipeed TANG PriMER development board featuring an Anlogic EG4S20 FPGA (codenamed Eagle S20). The only reason I bought the board was to see what Anlogic FPGAs are capable of, since I had never heard of that FPGA vendor before. No need to think twice when the board costs less than 20$.

WSL on Windows 10

There is a new kid in town when it comes to “doing Linux under Windows”. Up to now there was primarily Cygwin and MinGW. But for a while now Microsoft offers the Windows Subsystem for Linux (WSL). I personally think the name should be the other way around (LSW) but what do I know.

Extracting MPEG2-TS from Wireshark capture file

When working with IP multicast streams it can sometimes be useful to convert a captured IP stream file to a corresponding MPEG2 transport stream (TS) file. Wireshark has a built-in capability to extract MPEG2-TS packets from the UDP packets of an IP multicast stream. This feature is somewhat hidden away in the menus and not obvious to find.

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