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Smileroo
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Joined: Apr 01, 2013
Posts: 2
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 Posted: Mon Apr 01, 2013 1:31 pm Post subject: Turning off mass storage Nuvi 2595? |
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I have a charger for the car similar to the one in the below link which allows me to charge two devices at once via usb. I do this because of some of the long journeys I go on and my phone is used via Bluetooth to play music and take phone calls through my car stereo and my new Garmin unit is to be used as my Sat Nav.
http://www.amazon.co.uk/Griffin-PowerJolt-Dual-Charger-Player/dp/B001UKHHGY/ref=tag_stp_s2_edpp_url
My problem comes from when I try to charge my Sat Nav using the usb cable as it automatically goes into mass storage mode and I can't actually use the Sat Nav while it charges. Is there a way of getting around this so I can charge via the usb cable but also use the Sat Nav? |
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sussamb
Pocket GPS Verifier
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Joined: Mar 18, 2011
Posts: 4456
Location: West Sussex
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| Posted: Mon Apr 01, 2013 6:28 pm Post subject: |
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| You may find a different usb cable would do what you want. Garmin cables put your GPS into mass storage mode, some 3rd party cables won't AFAIK. |
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Smileroo
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Joined: Apr 01, 2013
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| Posted: Tue Apr 02, 2013 9:44 am Post subject: |
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| Is the Garmin cable a type 3.0 and you need to use an older spec type 2.0 or is it something else? I have tried a couple of cables I have lying around the house and they have the same problem. I do have another for charging my controller on my PS3, I'll try that one later today and see what happens. |
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MichaelCahill
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Joined: May 23, 2008
Posts: 132
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| Posted: Tue Apr 02, 2013 9:46 pm Post subject: |
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I bought an adaptor a while ago which plugs into the cigarette socket in my car.
It has a number of power take offs - 3x 12v cigarette lighter type, 2xUSB.
This way I can power the sat-nav via one of the 12v outlets while also charging my phone via a USB at the same time.
Would something similar solve your problem?  |
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PhilHornby
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Joined: Dec 07, 2006
Posts: 563
Location: North Devon
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| Posted: Wed Apr 03, 2013 1:24 am Post subject: |
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| sussamb wrote: | | Garmin cables put your GPS into mass storage mode, some 3rd party cables won't AFAIK. |
Garmin just use standard cables for connection to a PC or Mac - the unit detects the absence of a connection between pins 4&5 and enters Mass-storage/MTP mode.
Garmin chargers OTOH have a 'personality' resistor (or a short) between these pins and so the unit knows it is a charger. Different value resistors are used to denote different connections, such as Traffic Receivers, Fleet Management interfaces etc.
| Smileroo wrote: | | I have tried a couple of cables I have lying around the house and they have the same problem. I do have another for charging my controller on my PS3, I'll try that one later today and see what happens. |
The issue is, that you need to somehow get at Pins 4&5 in the Mini/micro Type B plug. I'm not even sure you can buy a plug that gives access to these pins (the ones I bought from Maplin didn't).
You could make one, by cannibalising a real charger lead - preferably one of the cheap ones - using the Type 'B' end from the charger lead, and any old USB lead that has a Type 'A' on the other end.
Note though: you might be telling the unit that it is allowed to draw up to 1A from the USB connection, without performing any sort of negotiation first. Make sure the current source is up to the job!
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