max7219 and pic16f627

[helenevans]

thanks for all the responses.
So the problem has come back again. One thing i've done is to re-initialise the maxims, every now and again, so at least they come back to life eventually. but it's far from an ideal solution.

I have put a pause in as Acetronics suggests (although i need the speed) and they do keep going for much longer. but eventually they too, pack up (!)

the speed, yes, maybe this is the issue. i guess most people don't want to change them so rapidly...
Looking at the data sheet, I presume i need to consider the Pulse Width High (which is 50nS)? How can i calculate the right pauses and when to put them, to put the pic in synch with the maxims?
Sorry, i'm sure this is all pretty basic stuff...

any further thoughts, i'd be happy to hear them,
best, Helen