So, let's test this code!  If the display is wired up correctly, and all the…

The two LEDs on the STM32 boards are pretty minimal.  The docking board parallels those…

An HD44780-type display can perform a number of functions, but we will just focus on…

Remember that up to now we didn't much care what numbers we had to feed…

The two LEDs on the STM32 boards are pretty minimal.  The docking board parallels those…

So far, we've done everything in this series using two LEDs and one button.  I'm…

Now it's time to write the interrupt service routine.  For the AVR, a negative edge…

In most cases the answer is, as little as possible.  An ISR should do what…

As part of the automatic response to an interrupt request, the uC hardware will save…

That, at least, could be one reaction to this chapter.  But over the years I've…