I know I'm coming in on this thread a little late, but I'm trying to control the A6280 as well. I'm using a PIC16F873a which has a SPI port. Supposedly it is very easy to use the SPI port because it handles the serial clocking of the data and such. I was wondering if someone could clarify something though. Does the SCK pin maintain a constant clock pulse. I believe how it's setup is to deliver OSC/4 to that.
It Does NOT.Originally Posted by Photovor
It only puts out a CLK when data is being sent.
The A6280 needs a CLK all the time though, not just when there's data.
DT
Thanks for the clarification. Is there a way to utilize the oscillator that is supplying the clock for the PIC to also supply the clock pulse for the A6280, and use the SPI functions as well? Or would SPI not work at all in this example? It's a shame that the A26281 just comes in a QFN package, considering it has its own internal PWM counter.
It's possible, with external hardware, extra pins on the chip, and a great deal of thoughtful programming.
But since you can use the CCP module in co-operation with SHIFTOUT commands on 2-3 PINs and no external hardware .... Why?
DT
I was just curious if it was possible or not. I'll have to play with the examples above and see what I can get out of it. I've never used the CCP module, but I like the idea of not having to rely on any external clock sources.
Ok, I got around to trying the example in this thread. I had to change a piece or two because I'm using a PIC12F683. The main changes were to change TRISB to use TRISIO (since there is only one GPx PORT), and of course the SHIFTOUT command to use the correct pins on that port as well.
I'm getting no results, and it doesn't seem that the CCP module is working correctly. Is there a way I can test this individually?
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