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Posts: 3
Registered: ‎12-23-2015

C8051F930-TB in sleep mode unable to connect

I have C8051F930-TB, well along in application development using SI IDE. 

Added sleep mode to the app.  Built and downloaded to the C8051F930-TB.

Sleep 1 second, wake up, make an ADC measurement, send via RS232, back to sleep.  Works well.

 

But now I can't connect to the TB from SI Labs IDE.  When the application in the 8051 runs, the IDE becomes disconnected.  Attempting to connect generates a message "Target Failed to Respond, System being disconnected".  And the application in the 8051 stops.  Cycling power via the power switch on the TB starts the application again.

 

Is there any way to connect to the C8051F930-TB?  Or is the TB "dead"?

 

Dave Chanoux

Scanning Devices Inc.

dchanoux@scanningdevices.com

 

Posts: 2,326
Registered: ‎10-14-2014

Re: C8051F930-TB in sleep mode unable to connect

[ Edited ]

@Dave_Chanoux

do you mean your application still works fine? if it works i think maybe there is some hardware issue, your adc and uart configuration should take some time and the C2 interface should work.

if the application could not work, I think the possible reason is that you entered the sleep mode too soon after reset and bricked the device.

Not sure if below KB helps to understand the issue.

http://community.silabs.com/t5/8-bit-MCU-Knowledge-Base/quot-Bricking-quot-an-8-bit-MCU/ta-p/152311

WeiguoLu
<a href="http://community.silabs.com/t5/Welcome-and-Announcements/Community-Ranking-System-and-Recognition-Program/m-p/140490#U140490"><font color="#000000"><font size="2">Hero</font></font> </a> jmg
Posts: 1,175
Registered: ‎04-27-2004

Re: C8051F930-TB in sleep mode unable to connect


I have C8051F930-TB, well along in application development using SI IDE. 

Added sleep mode to the app.  Built and downloaded to the C8051F930-TB.

Sleep 1 second, wake up, make an ADC measurement, send via RS232, back to sleep.  Works well.

 But now I can't connect to the TB from SI Labs IDE.  


Which debug adapter are you using & is it the latest firmware?

 

There is also more info around this Sleep issue here :

http://community.silabs.com/t5/8-bit-MCU-Knowledge-Base/Recovering-an-EFM8-STK-using-an-external-8-b...

 

Suggests Flash Programming Utilties -> erase may resolve things.