This Arduino UNO shield turns your UNO R3 into a debugWIRE hardware debugger
Designed by Arduino Craft Corner in Germany
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What is it? This Arduino UNO shield turns your Arduino UNO R3 into a hardware debugger that is able to debug classic ATtinys and ATmegaX8s, such as the ATmega328P. Well, you also need the open-source…
Read More…This Arduino UNO shield turns your Arduino UNO R3 into a hardware debugger that is able to debug classic ATtinys and ATmegaX8s, such as the ATmega328P. Well, you also need the open-source firmware dw-link.
The hardware debugger speaks debugWIRE with the target chips and has a gdbserver interface to the host. In other words, you can use GDB on your host computer to debug your AVR chip!
The shield provides the following features:
As a bonus, the software also implements an ISP programmer. So, you can program and debug your target board without changing the connections.
If you want to try this out without buying the hardware, use the quick-start guide.
I like the classic AVR chips and use them for a number of low-power projects. What I hate about it is that the Arduino framework does not offer any debugging support for these chips. The alternatives to the Arduino framework are all expensive, proprietary and/or clumsy.
So, I came up with the dw-link Arduino sketch that provides all the needed software functionality on an UNO. However, when you start debugging systems, then you will quickly notice that the basic hardware interface provided by an UNO without this shield is not enough. You also want to handle 3.3 Volt systems, you want to deal with power hungry systems that might need more than 20 mA, and you want to disconnect the ISP lines from the target while you are debugging. So in addition, to the basic debugging firmware, I designed this shield.
It is a tremendously useful tool and will make your debugging experience awesome. There is nothing comparable out there.
You can get either
When you want to debug something, you need additionally
The shield is not really complicated to build. Just follow the assembly instructions, which you find together with the design files in my GitHub repo.
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Walter | Jan. 16, 2024
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