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Debugging 2.0

The featured image of this blog post is based on vector graphics by captainvector at 123RF.

What keeps people from using a debugger? Well, it is mostly that one has initial costs in terms of setting up the debugging environment and of learning how to use the debugging tool. Hopefully, the next iteration of my hardware debugging tool dw-link, which is able to debug classic ATtinys and ATmegaX8s, will somewhat ease that burden, in particular, because you can buy the accompanying hardware now at Tindie.

I sell on Tindie

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Calibrating Your AVR MCU

The featured picture is by OpenClipart-Vectors on Pixabay.

In building one’s own MCU board, one often does not use a crystal or resonator. Instead, the internal RC-oscillator is employed, which can be quite inaccurate. Similarly, if one wants to use the internal reference voltage to measure the supply voltage, it turns out that the reference voltage can deviate from its nominal value quite a lot. Both, the RC-oscillator and the internal reference voltage can be calibrated, though. In this blog post, I describe a simple method to calibrate both using only a UNO board and a multimeter employing the avrCalibrate library.

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ATmega328P: Fake or Real?

The featured image of this blog post is by PublicDomainPictures from Pixabay.

Recently, I bought some ATmega328P-PU (DIP packages) chips in China and was concerned that they might be counterfeit, given that three years ago some ATmega328P clones, which did not support nano-power, had been found on Pro Mini boards. The first check looked as if they were fake chips, but apparently, they were the real thing. but they seem to work fine.

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