TheBackShed.com

Forum Index : Microcontroller and PC projects : Strange Case: WakeUp on MX470.64pin

Author

Message

sagt3k

Guru

Joined: 01/02/2015
Location: Italy
Posts: 313

Posted: 09:48am 26 Mar 2017

Copy link to clipboard

Print this post

Hi to everybody

I am using PIC32MX.64pin with firmware 05.03.02. I use pin(51) to simulate wakeup action etc.
If the micro is NOT connected to USB and I do "cpu sleep" after I can use Pin(51), the micro answer correctly and continues to run.
While if I connect micro with USB makes some strange behavior. Sometimes "cpu sleep" It has no effect does not go into sleep. Some time after giving the command "cpu sleep" even if I use the pin (51) does not wake up again and I have to do a reset.
what's the problem ? where am wrong

Thanks
sagt3kEdited by sagt3k 2017-03-27

Geoffg

Guru

Joined: 06/06/2011
Location: Australia
Posts: 3167

Posted: 03:20pm 26 Mar 2017

Copy link to clipboard

Print this post

You will have trouble if you have an active USB connection and use sleep. This is something I should have mentioned in the documentation.

Sleep is all about saving power in a battery powered application so in a practical situation it should not matter because there is little reason to send the Micromite to sleep if you have an active USB connection.

Geoff

Geoff Graham - http://geoffg.net

sagt3k

Guru

Joined: 01/02/2015
Location: Italy
Posts: 313

Posted: 08:51am 27 Mar 2017

Copy link to clipboard

Print this post

Hi Geoff

OK Clear, but is it possible to have a variable MM.USB=1 that indicates a USB console connection? Or is it possibile to have no action with "cpu sleep" when is actvie USB connection?
Thanks
sagt3k

CircuitGizmos

Guru

Joined: 08/09/2011
Location: United States
Posts: 1421

Posted: 10:41am 27 Mar 2017

Copy link to clipboard

Print this post

sagt3k said is it possible to have a variable MM.USB=1 that indicates a USB console connection?

I like that. Seconded.

Micromites and Maximites! - Beginning Maximite

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 8608

Posted: 11:49am 27 Mar 2017

Copy link to clipboard

Print this post

Quote is it possible to have a variable MM.USB=1 that indicates a USB console connection?

? peek(word &HBF885060) and 1

will tell you if the USB is plugged in

1=yes
0=no

sagt3k

Guru

Joined: 01/02/2015
Location: Italy
Posts: 313

Posted: 06:55am 28 Mar 2017

Copy link to clipboard

Print this post

Hi matherp

I tried with USB console and give me 1 and later with UART on TX/RX as console ... same result=1.
Where is the error?

I'm trying on PIC32MX470H.64pin with MMbasic "5.0302".

Thanks
sagt3k

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 8608

Posted: 08:19am 28 Mar 2017

Copy link to clipboard

Print this post

This is showing power to the VBUS pin-34 (on 64-pin). If you have power on that pin USB is enabled whether you want it or not

sagt3k

Guru

Joined: 01/02/2015
Location: Italy
Posts: 313

Posted: 08:58am 28 Mar 2017

Copy link to clipboard

Print this post

Hi matherp
Thanks

solved.
But I don't know very well PIC32MX/MZ with various pin. But this address(&HBF885060) is equal on all PIC32xx ?
Or Can you think to implement MM.USB ?
Thanks
sagt3k

sagt3k

Guru

Joined: 01/02/2015
Location: Italy
Posts: 313

Posted: 11:10am 18 Sep 2017

Copy link to clipboard

Print this post

Hi matherp
Concerning PIC32MZ2048EFH 64pin, What is the address to read if connected with USB or no?

Thanks
sagt3k

Print this page

To reply to this topic, you need to log in.