PSoC™ 5, 3 & 1 Forum Discussions

I am trying to understand interrupts for PSoC 5LP, using Kit-059.

AN54460 shows the architecture of the interrupt, and is reasonably clear.

For interrupt project 2, section 4.2 PICU Interrupt Project, there are two interrupts:

PICU interrupt that occurs when a button is pushed thereby changing the port register value

Tick interrupt that occurs to accomplish de-bouncing (at 1 kHz).

If I understand what's happening:

the Tick interrupt happens at a 1 kHz rate  (1 ms).

when a switch is pressed, the PICU interrupt appears to set a countdown variable

counted down by the Tick interrupt

so, my questions:

1) please correct my view of what's happening

2) where do i put my code to be executed when a switch is pressed?

3) can variables be passed back and forth between the interrupt routines and the main routine? if so, how?

(or, maybe better, can the interrupt set a flag or value, so that the code can be executed in main, instead of in the interrupt routine?

4) i am not following the turning on and off of interrupts or maybe i'm not distinguishing between on and off vs set and clear functions

5) what is the sequence of events (by line number??) before a switch is pushed, when a switch is pushed, and after a switch is pushed?

thank you for your help and patience

I can't find the LPF component in my PSoC creator (using CY8C5888LTI for the project), but the Resource  Meter showing there are two unused

Here is the screen shot of the Component Catalog

Do I need to install additional libraries?

The default mode is high impedance but this doesn't work well with a self powered device. If you pull the USB connector it can take a long time for the VBus line to drift low. It's a legal selection for the pin but don't want to cause any unwanted issues although I think an SIO is fairly hardy.

I am getting an error of analog routing solution when i try to connect Amux,Opamp and Adc.

can anyone help me to solve this error?

I am attaching my workplace over here.

Thanks,

I am using 5LP and need 1.024V Vref in the schematic.

Because all 4 Comparators are used, I am not allowed to "AutoEnable" the 1.024V Vref, the Datasheet says Vref needs to be manually enabled in analog block.

But I cannot find the instructions for how to manually enable Vref.

Can someone help me on this?

Thanks.