My project is starting

[cncmachineguy]

I think I just found the problem. I left too much up for granted. Being new to this chip, I never dreamed it would default to a 500K clock!

BTW, I am running intosc (apperantly at 500K, not 4M like I assumed) So I will set osccon to be 4M and see what happens

EDIT: How fantastic life is when you tend to the little things. now works as it should. Off to do more fun stuff

[cncmachineguy]

New question
Heres a snipit:

' Configure pins for digital operation (uncomment as needed).
' These settings are intended as simple examples.  For more detail,
' see the appropriate device datasheet for register descriptions.
'ANSEL =  %00000000  ' 16F88, 16F688, 16F690, 16F88x
'ANSELH = %00000000  ' 16F690, 16F88x
'ADCON1 = %00000111  ' 16F87x, 16F87xA, 18F452
'ADCON1 = %00001111  ' 18F4620

Why when I uncomment the ANSELH line, I get a syntax error for that line? How should I be setting it?

[cncmachineguy]

Well I don't get it, but after changing nothing, it works. go figure

[mackrackit]

Looks like, but I have not used this chip, that the ANSEL has changed some.
ANSELA
ANSELE
ANSELF
ANSELG

ANSELA = %00000000
ANSELE = %00000000
ANSELF = %00000000
ANSELG = %00000000

Maybe...

[cncmachineguy]

Well I broke my own rule of troubleshooting- NEVER change more then 1 thing at a time!! While I was trying to figure it out, I must have kept changing "define osc 4" to "define osc = 4". Playing with caps back and forth. I was relocating where I had the statement and not noticing I kept adding the = sign.

[cncmachineguy]

new question, or looking for suggestions.
I am gonna run my pic at max speed for it. thats 32 meg. The way I was going to handle my step/dir signals was to just pass them through to my drives. So my main would look something like this:

Main
 portc = porta ' pass all values to C
 if porte!=0 then LimitHit 'check for overtravels
 goto main

Thats my whole main section. Now for my problem

If I want my interface card to look and act like a Gecko drive, their timing is this: step signal requires a min low of .5microsec and a high of 4 microsec. It occurs to me the .5uS will be 4 instructions running at 32meg so I think I could miss that pulse real easy. In fact I may miss many.

Now there are some other thing going on here, 1 I don't think EMC is updating the port that fast, and 2 I can make the pulses longer. The one thing I can't do is IOC cuz the boards made already so wrong port.

I guess I am just looking for other opinions here as to how to handle this. BTW, If i hit a limit, I don't care if I miss steps at that point.

[mackrackit]

If it is any help..
My setup has the step drive set to 5000 ns. "nano"