SanDisk Sansa View
There is still a lot of work to be done. The firmware can be disassembled with an ARM disassembler, but nothing has been done. We need to get the LCD working and figure out the GPIO.
High quality PCB scans:
Front of main PCB
Back of PCB & memory board
Back of display, battery pack, wheel/button part
--Scans were provided by space_ghost on the forums.
Hardware wise it seems very similar to an upgraded v1 Sansa E200. The SoC
looks like an evolution of PortalPlayer
with nVidia GoForce
magic applied.c. nVidia purchased the PortalPlayer
company prior to the release of the GoForce
6100 chip, so that would seem reasonable. Also- the same PortalPlayer
provided/supported mi4 style firmwares are used, and the firmware even mentions "PP6110".
(two images). Decryptable with a recent mi4code
. mi4 files signed with the same "dummy" DSA signature that the v1 Sansa E200 used are accepted by the View. In other words, the View's original firmware can be successfully modified and flashed.
Disk layout and hidden partition
You can initiate UMS mode by doing the following steps:
- Turn on the Sansa View and let it boot up.
- Switch the hold switch to the hold position, and wait for the padlock icon to disappear.
- Hold down the left side of the scroll wheel for a couple seconds, and while still holding, plug the USB cable in.
- Keep holding until the player shows "Connected".
Another way to initiate UMS mode if your OS does not communicate to it via MTP is to just plug it in and wait a bit. The player will attempt to reset the MTP connection, and then when it realizes that is not helping, it will switch to UMS.
I attached the `lsusb -v` output of both the Sansa View in MTP and UMS mode. -- BlakeJohnson
- 18 Feb 2008
Recovery mode looks similar to the Sansa E200. You can initiate recovery mode by doing the following steps:
- Turn the Sansa View completely off. To turn completely off, hold the power button for about 5 seconds instead of a quick press.
- Switch the hold switch to the hold position.
- Hold down the 'Home' button, and while still holding, plug the USB cable in.
- A partition named "16MB-FORMAT" comes up as a USB MSD.
- Copy your firmware files to your device.
- Eject the device (unplugging isn't enough).
- It will reboot and you're all set.
: Only move firmware files to the device when in recovery mode. Do not format the device while recovery mode. Do not interrupt file transfers while in recovery mode. Disobeying these warnings may or may not brick your player, but I'm not going to be the one to test them. However, I have recovered from several bad flashes using the above method.
Pre-boot or manufacturing mode is done exactly the same as recovery mode except hold the middle button instead of the 'Home' button when you plug the USB cable in. We may be able to do some fiddling with the e200tool
while in this mode.
Here is a list of all the pins used by the OF. Pins are of form BxPyy where x is the bank and yy the number within the bank. Direction only applies to GPIO.
|| horizontal button lights
|| vertical button lights
|| LCD reset
|| SD detect (active low)
|| LCD type
|| SD detect (active low) (again ?)
|| LCD SPI data
|| LCD SPI clock
|| LCD SPI chip select
|| LCD unknown
|| Up button (active low)
|| Down button (active low)
|| Home button (active low)
|| Right button (active low)
|| Select button (active low)
|| Left button (active low)
|| scrollwheel left light
|| scrollwheel up light
|| scrollwheel right light
|| scrollwheel down light
|| Power button
|| Hold button
Copyright © by the contributing authors.