Smarter Life Challenge - Brainwaves based appliance controller - Update 5

RE: Smarter Life Challenge - Brainwaves based appliance controller - Update 5

e14 Contributor — Tue, 17 Dec 2013 07:13:29 GMT

Hi Cosmin,

I really liked your project idea and the by looking at your updates, I am quite certain that you will be able to get your idea working on PSoC 4.

When I was going through your this post I figured out that you need comparators in your design. I think i can help you with this, PSoC 4 has two OpAmps which can also be configured as Comparators, apart from this PSoC 4 also have a pair of Low power comparators (LPComp), you can use them to create a window detector, the only problem is these comparators can only generate an interrupt and cant provide a hardware output, but this can be be easily dealt inside PSoC 4 by using the interrupt to set a Control register which can be virtually used as a comparator output.

There is one more trick to get a window comparator, in this trick use the ADC, the ADC in PSoC 4 can generate an interrupt when the input is outside a window or within a window, you can use this interrupt as a virtual comparator. Moreover you can change the window levels at run time if use ADC.

Let me know if you need any further information.

Thanks,

Rahul

RE: Smarter Life Challenge - Brainwaves based appliance controller - Update 5

vsluiter — Tue, 26 Nov 2013 22:19:14 GMT

Nice post, Cosmin

Glad you shared that debugging process, could save others a lot of time. Have you contacted your Cypress contact to see whether they can tell you how that happened?

I really like that you're showing your 'mess' of electronics to us. Each engineer has his own style, and you already got to a very nice result!

Have you thought about using the PSOC5 on the same board? I guess it has more analog peripherals!

RE: Smarter Life Challenge - Brainwaves based appliance controller - Update 5

DAB — Mon, 25 Nov 2013 20:46:15 GMT

Good update.

I appreciate your perserverence in tracking down the problem. I would not have thought that the PSOC IDE had a built in optimizer.

That said, I am not surprised. Everytime I use a new software assembler and compiler I have to find out what interesting artifacts they put into the final code.

In this instance, have them play with the hardware as well is very useful information.

DAB