Problem with changing the floppy disk. about arduinofdc HOT 6 CLOSED

Yes, ArduDOS does not automatically detect a disk change. This is shown in the list of limitations (item 3): https://github.com/dhansel/ArduinoFDC#ardudos

To notify ArduDOS that the disk has changed, re-select the curent drive (e.g. "a:" followed by ENTER).

from arduinofdc.

Laziness :) I was focused on reading/writing the actual data, which is what the ArduinoFDC library is about. Adding ArduDOS was just an idea to demonstrate what can be done using the library.

Checking whether the disk has changed is not hard. Just connect pin 34 [edit: incorrectly said pin 33 before] of the floppy cable to an unused Arduino pin. In the sketch, call pinMode(pin, INPUT_PULLUP) to configure the input pin. Then you can use if( digitalRead(pin)==LOW ) { /* disk change detected */ } to detect the change.

Note that the pin will continue reading LOW until you clear the "disk change" flag in the drive. The only way to clear that flag is to move the disk drive head. So you'll have to (attempt to) read some sector data on a track different from the one that the head is currently on.

from arduinofdc.

Thank you for your quick reply :) and my apologies, I must not have read.

I think you can close the topic. Regards.

from arduinofdc.

Or not. :)

What is the reason for the lack of detection?

from arduinofdc.

heh... I see, I asked because I thought it was something more complicated :)

By the way, thanks for giving the way.

However... pin 33? isn't that GND by any chance? ;)
I noticed, while looking for information about the DSKCHG# signal (i.e. pin 34), that - according to Wiki - it's an input pin, which surprises me a bit, that you set pinMode() to INPUT_PULLUP no but.... there's always a chance that there's an error in the Wiki :)

from arduinofdc.

Oops sorry yes I meant pin 34. I fixed it in my original comment so as to not misinform anybody reading this thread. Thanks for the correction!

from arduinofdc.