Accessing the pins

christopher

Using Spin with dira and outa I have been able to configure and set as output and toggle all of ·the propeller·pins. However when I switch to another cog and use assembly I can only toggle p0-p7 and p8 using

mov dira,#$ffffffff··· ; to set all pins as output
mov outa,#$ffffffff·· ;to set all pins high

But this code only set p0-p7 and p8 high.·Where am I going wrong?


Thank You

Christopher·

CJ

the problem is that the literal source value is limited to 9 bits, to toggle all the pins you would have to use another register to store the value and point to it with the source instruction as attached

edit: noticed an error in my syntax fixed and added a loop that toggles the pins once a second

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Who says you have to have knowledge to use it?

I've killed a fly with my bare mind.

Post Edited (CJ) : 5/29/2006 5:02:59 PM GMT

christopher

Many thanks for the quick response, Great!


Chris

CJ

fixed an error in my previosly posted code

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Who says you have to have knowledge to use it?

I've killed a fly with my bare mind.

SSteve

Chris: You aren't the only person to run into that problem. It stumped me for a while, too. Chip has said he will look into changing the Propeller Tool so that it will catch that and give an error message.

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OS-X: because making Unix user-friendly was easier than debugging Windows