Putting computer to sleep through USB.

A

alphacat

New Member

• Jun 21, 2009

• #1

Hello,
my microcontroller is connected to the PC through the USB, and they both communicating through a USB-to-UART bridge.
I'd like the MCU to put the PC into sleep (standby mode), and wanted to ask you please, how is it done?
What command should the microcontroller issue for that?

Thank you very much.

 

3v0

Coop Build Coordinator

Forum Supporter

• Jun 21, 2009

• #2

What OS is the PC running ?

 

A

alphacat

New Member

• Jun 21, 2009

• #3

The OS installed in my computer is Microsoft XP 2002 (Service Pack 3).
Generally, I'd like to be able to put into sleep any OS.

 

AtomSoft

Well-Known Member

• Jun 21, 2009

• #4

Its as simple as picking a OS. You can have the PIC send a command to PC and in your program have it determine the OS and send the correct Sleep Instruction.

What are you using to program the PC side application?

 

blueroomelectronics

Well-Known Member

• Jun 21, 2009

• #5

If it's just to shutdown then look at the UPS mode in the POWER settings. You could emulate a UPS with either RS232 or USB.

 

3v0

Coop Build Coordinator

Forum Supporter

• Jun 21, 2009

• #6

There is a load of info on the net on how you can cause XP to sleep programmaticly.

One way is to have the program on the PC run this.

rundll32.exe powrprof.dll,SetSuspendState

 

AtomSoft

Well-Known Member

• Jun 21, 2009

• #7

yeah you can also from VB6:

Code:

Private Declare Function SetSuspendState Lib "Powrprof" (ByVal Hibernate As Long, ByVal ForceCritical As Long, ByVal DisableWakeEvent As Long) As Long
Private Sub Form_Load()
    'KPD-Team 2001
    'URL: http://www.allapi.net/
    'E-Mail: KPDTeam@allapi.net
    'start hibernating, but don't force it and don't disable all wake events
    SetSuspendState 1, 0, 0
End Sub

 

A

alphacat

New Member

• Jun 21, 2009

• #8

Thank you very much guys.
Your help is much appreciated!