LPC1700 Deep Sleep won't wake up

Development Boards MicroMod
1

I am trying to run on LPC1754, 59 and 68 + FreeRTOS + CMSIS and I’d like to be able to put the uC in the lowest power mode possible, but:

  • “sleep” is not enough.

  • Once the uC is in “deep sleep”, “power down” or “deep power down”, I can’t wake it anymore by pressing a button (EINT3).

I am using “GPIO Interrupts” for a couple of pins in P2, that, in turn, is shared with EINT3. EINT3 pin itself (P2.13) was not being used. Before I go low power, GPIO Interrupts work perfectly, the problem just happens after low power (deep sleep ou power down).

As far as I read in the “LPC17xx User manual” (pg 58, 59), I should be able to wake up from EINT3 up to “power down” mode.

What I am missing? Is the interrupt being generated while in low power? How to tell? Should I do any specific stuff to be able to generate it?

Just to simplify, I am running from internal RC, so the PLL errata is not a concern.

I can post some code if needed. I haven’t done it because I think it would be a too long post for starting.

Thanks!

2

Do you have it working yet? I’m new to ARM (this week), and I’ve just been playing around with interrupts (GPIO, and EINT0, in various incarnations), and sleep() and deep_sleep() seem to work ok. I’m using CMSIS.

Roger

3

I posted a reply in:

http://stackoverflow.com/questions/6207 … nt-wake-up

From UM10360 - User manual, Rev. 2 — 19 August 2010 page 758:

Remark: If the processor detects a connection to a debugger it disables the WIC.

So it won’t wake up!!!

What a shame…

If you need a working example, you can star with my attachment here.