Tag Archives: ATmega4809

SPI Week

This is the week I’m determined to cover the SPI interface. In the process of testing I uncovered an error in the ATmega4809 documentation. The documentation states for the IF Receive Complete Interrupt Flag, “IF is cleared by hardware when executing the corresponding interrupt vector.” This is not true. The flag must be manually cleared …

Timer/Counter Wins

I performed surgery on the Arduino Library. Yes, it is a risky task. I had to modify five source files, but the changes are conditionally compiled. I had previously added another “board” that is the Arduino Nano Every with a 20MHz clock so I could easily select it. Now I’ve gotten rid of the ATMEGA328 …

Timer/Counter Woes

The Arduino Nano Every does its best to mimic the operation of the Arduino Nano even to the point of making it difficult to obtain the best performance of the part. I’ve just been pulling my hairs over this and how they handled the Timer/Counters. The ATmega4809 has two types of Timer/Counters, “A” and “B”. …

Analog Comparator

The Analog Comparator has been ignored in the Arduino library software. I discussed it in my Far Inside The Arduino book for the ATmega328P parts, like the Uno and Nano. The Analog Comparator in Arduino Nano Every’s ATmega4809 is more versatile and has more features. There is now an internal DAC that can be connected …

The Plot Thickens

Progress is slow as I’ve been busy with other things. I’ll probably be 50% finished with the Arduino Nano Every book in another week. I think I’ve been spending too much time answering Quora questions, which not only doesn’t get the book written but also doesn’t make me more knowledgeable as the questions are too …