Matrix user forums

Hello,

I need to inteface a rotary encoder to a PIC. I can bit-bang it, but I would like to know if there is a standard macro for such a component available?

TIA,

Jan Didden

Hello Jan

Some of the PICmicro chips have quadrature encoders built in as a peripheral. These can be used with flowcode via C code calls. Currently there is no component to utilize this hardware.

Other then this yes you will have to perform a bit banged interface.

OK, thanks.

Jan Didden

Not that I have a need for this at the moment (although I have used these in the past); a Quadrature Encoder Component seems like it would make a great addition to flowcode. Any plans to add one in the near future?

Edit: Just realized that this post might have been better posted in the "Components Other" section, since this isn't really a communication component (or is it )

We are working on quadrature encoder functions as part of a proposed, advanced motor control project. There are several possible techniques that avoid the requirement for a dedicated hardware interface module. These depend on the maximum frequency of the encoder signals and the availability of other device resources (timers, interrupts etc.)

It should be possible to make some development macros available in the very near future.

That would be nice!

Another, related, question: does Flowcode support the Interrupt-on-Change feature on some PIC ports? Or do I need to set the appropriate registers in C or ASM supplemental code?

Edit: answer found elsewhere: No

Jan Didden

... and one more:

Using the switch macro to read a switch, you need to specify a variable WhichSwitch(byte). What does that signify? If I have switches A1...A8, and I want to read switch A3, do I use WhichSwitch = 2? 3?
If I define a variable SW3(byte), and give the switch also the label SW3, can I then use SW3 as variable to access the switch as well as the return variable name?

Jan Didden