Timing issue

[gadelhas]

Hi All, and thanks for your answers!!!

Sorry, I missed the GPIO setting.

No problem Dave!!!

Hi,

Three things ...

1) you use the IOC interrupt ... so that rings the " Mismatch condition " bell in my head ... see Sleep datasheet chapter.

2) Microchip recommends to place a NOP instruction just past the Sleep one, when using the feature this way.

3) when you push a button ... you obviously release it one day ! makes two input changes ...

Alain

Alain; I read the datasheet but couldn't get anywhere, believe me, I tried.

try to add

@ sleep
@ nop

bogdan, tried also that, but its not the solution for my problem.

Ok, the only conclusion that i came up, is this:

If i disable the WPU on the button pin, put a pull-down resistor in this pin and connecting the VCC to the button, i don't get the issue. I only get the issue, if i take of the pull down resistor, enable the WPU and connect the GND to the button.
So the conclusion that i came up, not knowing it it is the correct one, is that, on power up the GPIO state is LOW. So because i have the WPU enable on this pin, i think a interrupt is triggered, because i have a mistmach condition on this pin. If i disable the WPU, put a pull-down resistor in this pin and connecting the VCC to the button, i don't have the mistmatch condition, so the PIC goes to sleep.

If this conclusion is not the correct one, i don't know, why the micro is not going to sleep on power up!!!