matrix ????

[atoo]

Which is more Difficult shiftregister series or parallel?
what is the best?

for working with arrays
in microcontroladores ?

[Mike Walne]

Neither they do two different jobs.

I your case, you've got a small PIC, driving a lot of output pins.
So, you need a small No. of inputs (serial) and a larger No. of outputs (parallel), hence a serial to parallel shift register.
For a large No. of input switches you work the other way round.
You chooes the one for the job in hand.

Mike

[temtronic]

remmeber though...
getting data in/out in parallel will always be faster than serial
...so what method(serial or parallel) you use, remember to factor in speed(access to data) in your decision.
Also consider board layout(hardware),cost of extra devices,etc.
Often you can buy a bigger PIC for just a few cents more and more I/O pins is always better !


hth
jay

[atoo]

then I'll practice parallel,

another question!

Which is correct?
this?
# Include <18f2550.h>
# Include <sanUSB.h>

or this?

# Include <sanUSB.h>

then the microcontroller can operate without the computer

this is the doubt !
about libraries

Charles francês joaõ pessoa PB