Triggering 5 TTL clocks simultaneously

[TurboLS]

Is there any reason why I can't get the process to start when PORTA.2 goes high?? I haven't rewired the HPWM/RB0 yet, but that should not matter. The PIC should at least shift the vertical clocks before even checking the reset (interrupt flag). Are my registers set correctly for analog input to PORTA.0 and digital input to PORTA.2??

[mister_e]

to have analog on PORTA.0

ADCON1=%00001110

[TurboLS]

OK, well I think I got it working so that it waits for the push button to start, but then it seems like it keeps going even after the loops have completed. I will put in an LED command to signal when clocking is in progress and see what happens. It may just be that my calculations for transfer times are just off. I figured that at 3.6Khz sampling (which is how fast we would be sampling the real data), we could sample the data, do the A/D, and send the data off chip in about 2 minutes at 19200 inverted baud. Am I off in my estimations?

[TurboLS]

Again, I have about 350,000 samples to take and transfer off the PIC serially.

[TurboLS]

OK, I think I finally have everything working. I have an LED on bit 5 of portb the is low when the clocks are not running and hig when they are. I had had a problem with the switch on PORTA.2 floating high, so I put a 2 position switch between 5v and ground and that seemed to solve the problems. My next move is to hook up a logic analyzer to make sure all the clocks are synched up. Thanks guys for all your help and I'll let you know how it goes.

[mister_e]

you don't really need that kind of switch.... place a pull-up or pull down resistor will do the job as well.

For the logic analyser stuff... great idea if you have one. Case not, if you still have an analog scope, it's easy to build one with few CMOS components.

[TurboLS]

We have a DigiView in the lab. I have never used one, so I am gonna take a few hours one day just to learn the ropes. But yeah, I definitely have one to work with. Also, since this is a camera, I think a physical button was the way to go, since, down the road, we want to make this thing hand held.