ADC in interrupt

mazur50 · Post by **mazur50** » Mon Dec 29, 2008 7:59 pm

how do you go about using an ADC as an interrupt. thanks for your help i am new to this.

I want to use a Case of and ADC range to start the interrupt.

mazur50 · Post by **mazur50** » Thu Jan 08, 2009 8:58 pm

anyone

rocketbob · Post by **rocketbob** » Thu Jan 08, 2009 10:11 pm

I would think you would just want check the value of the ADC in the main loop of your program, then do something if its out of range. I don't think you need an interrupt for that.

mazur50 · Post by **mazur50** » Thu Jan 08, 2009 10:23 pm

I need to be able to interrupt the main loop on an adc value.

madinventions · Post by **madinventions** » Fri Jan 09, 2009 9:34 am

I'm not sure how it would be possible to cause an interrupt on a specific ADC value. However, if you want to trigger an interrupt at a specific analogue voltage level then some PICs have a built in comparator that would do the job. Failing that, an external window comparator with the output fed into an interrupt pin would do the job. How accurate do you need the trigger voltage to be?

Ed.