Editing Documentation/Maemo 5 Developer Guide/Development Environment/Maemo Flasher-3.5

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The  Maemo Flasher-3.5 tool is used to flash data to the Maemo device internal 256 MB of NAND, which is where the bootloader, kernel, and rootfs (all of which make up the operating system) are stored. For N900 it is also used to format and flash the eMMC internal storage card (32GB). Flasher-3.5 can be used to upgrade to a new firmware, wipe the Maemo device and start from scratch, flash certain specific components, or change a number of hardware flags. It also can load and start a kernel and auxiliary system to RAM, e.g for recovery purposes, see [http://wiki.meego.com/ARM/N900/Using_Rescue_Initrd]
The  Maemo Flasher-3.5 tool is used to flash data to the Maemo device internal 256 MB of NAND, which is where the bootloader, kernel, and rootfs (all of which make up the operating system) are stored. For N900 it is also used to format and flash the eMMC internal storage card (32GB). Flasher-3.5 can be used to upgrade to a new firmware, wipe the Maemo device and start from scratch, flash certain specific components, or change a number of hardware flags. It also can load and start a kernel and auxiliary system to RAM, e.g for recovery purposes, see [http://wiki.meego.com/ARM/N900/Using_Rescue_Initrd]
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Maemo Flasher-3.5 Tools could be downloaded from the [http://tablets-dev.nokia.com/maemo-dev-env-downloads.php Maemo Development Environment Downloads] page in the past.
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Maemo Flasher-3.5 Tools can be downloaded from the [http://tablets-dev.nokia.com/maemo-dev-env-downloads.php Maemo Development Environment Downloads] page.
== Release details ==
== Release details ==
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{{ambox|text=Never flash/reflash the eMMC content after you bootup the N900 device with new FIASCO image because all the optified content that gets automatically moved from rootfs to eMMC during first device bootup will be lost.}}
{{ambox|text=Never flash/reflash the eMMC content after you bootup the N900 device with new FIASCO image because all the optified content that gets automatically moved from rootfs to eMMC during first device bootup will be lost.}}
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=== Setting Maemo device to flashing mode ===
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Heck yeah this is eaxtcly what I needed.
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Before flashing a Maemo device with a FIASCO image, it is recommended to firstly set the Maemo device into flashing mode. When you attempt to flash the device, it tries to enable flashing mode on the fly, in which case setting the device to flashing mode explicitly is not required, but there have been reports that with some clients this does not work.
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For Nokia N800 and N810 with a Diablo image, flashing mode can be enabled by following these steps:
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# Switch off the Maemo device (and do not use a charger)
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# Attach a USB cable to the Maemo device and computer
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# Switch on the Maemo device while holding down the Home (N800) or Swap (N810) hardware button
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For Nokia N900 with a Fremantle image, flashing mode can be enabled by following these steps:
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# Switch off the Maemo device completely (a Maemo device connected to a power source is never completely off for charging purposes, so you have to unplug your device)
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# (plug in one end of the USB cable to N900, don't plug other end yet)
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# Press and hold down the 'u' key
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# Connect a USB cable between the Maemo device and host PC while holding down the 'u' key (you may keep the USB cable plugged in to N900, it doesn't detect a cable that's not connected to PC)
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# When the N900 gets connected to PC, this powers the Maemo device and sets it to flashing mode
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# When the USB icon appears in the upper right-hand corner, the Maemo device is in flashing mode
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# Release the 'u' key
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If performed correctly, the USB image is visible in the upper right-hand corner of the screen.
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The Maemo device waits indefinitely for Flasher-3.5 input when it is in flashing mode. If flashing is tried without first setting the Maemo device to flashing mode, image flashing may fail because the Maemo device may not be able to change to the flashing mode automatically.
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{{ambox|text=Make sure that the device battery is fully charged before doing any sort of flashing operation because flashing fails if the battery runs out of power during the image flashing operation, and the device may not be able to charge an empty battery after a failure in flashing. USB icon not showing up, or vanishing after a short time and device tries to boot to linux, is a clear indication of a weak battery}}
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=== Command line options ===
=== Command line options ===
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To enable R&D mode for Maemo device, run:
To enable R&D mode for Maemo device, run:
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  $ flasher-3.5 --enable-rd-mode
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  $ flasher-3.5 -enable-rd-mode
To warm flash an image to the Maemo device, run:
To warm flash an image to the Maemo device, run:
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== Tips & troubleshooting ==
== Tips & troubleshooting ==
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* It appears that Windows 7 64 bit doesn't handle USB in the same manner, and this causes problems (http://talk.maemo.org/showpost.php?p=489976&postcount=4). Workaround by using another PC, or creating a virtual machine of the appropriate type (http://talk.maemo.org/showpost.php?p=490152&postcount=5). There is a fix that works for Windows7 (works on 64bit) here: http://talk.maemo.org/showpost.php?p=849980&postcount=20.
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* It appears that Windows 7 64 bit doesn't handle USB in the same manner, and this causes problems (http://talk.maemo.org/showpost.php?p=489976&postcount=4). Workaround by using another PC, or creating a virtual machine of the appropriate type (http://talk.maemo.org/showpost.php?p=490152&postcount=5).
* If you get a "Permission denied" error, then make sure you have execution rights to the Flasher-3.5 binary executable.  
* If you get a "Permission denied" error, then make sure you have execution rights to the Flasher-3.5 binary executable.  
* You need to have administrator rights or run command with sudo in Linux if you get errors like this: ''Error claiming USB interface: Operation not permitted''
* You need to have administrator rights or run command with sudo in Linux if you get errors like this: ''Error claiming USB interface: Operation not permitted''

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