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--- nvflash [2011/07/28 01:02] – created gilles
+++ nvflash [2023/07/08 00:04] (current) – [Installing nvflash] 94.102.224.209
@@ Line 1: / Line 1: @@
-Nvflash
+====== NvFlash ====== nvflash is a utility provided by Nvidia for flashing Tegra devices. Nvflash runs on a host PC and communicates with the Tegra system (the AC100 in our case) through a dedicated USB port (the mini USB port on the AC100). nvflash is distributed by nvidia as a binary only. Sources are not available and the communication protocol in not publicly documented.
-nvflash is a utility provided by Nvidia for flashing Tegra devices. It is available for download within various packages available at the Nvidia Tegra Developer Zone Downloads page.
+====== Installing nvflash ======
+==== From the nvidia tegra developper site ====
-To be able to use the nvflash utility with your AC100, you need to boot into Recovery Mode (this page includes information on running nvflash without beeing root).
+nvflash is distributed as part of the Linux4Tegra Development kit. available here: http://developer.nvidia.com/tegra-250-tango-development-kits
+The following commands will install nvflash in ~/tools/ldk/bootloader folder:
+<code>
+$ mkdir ~/tools/
+$ wget http://developer.download.nvidia.com/assets/mobile/files/tegra-linux-12.alpha.1.0.tar.gz
+$ tar xf tegra-linux-12.alpha.1.0.tar.gz
+</code>
+Two files are useful:
+  * ~/tools/ldk/bootloader/nvflash: the nvflash utility itself
+  * ~/tools/ldk/bootloader/harmony/fastboot.bin, a simple bootloader which is downloaded on the Tegra CPU to manage further communication with nvflash
+In order to be able to run nvflash as a normal user, you need to install an udev rule file:
+<code>
+$ sudo -i
+$ cat > /etc/udev/rules.d/60-nvflash.rules <<END
+# nvflash support for Nvidia Tegra systems attached to USB
+SUBSYSTEM=="usb", ATTR{idVendor}=="0955", ATTR{idProduct}=="7820", MODE="0660", GROUP="plugdev"
+END
+</code>
+This last step is optional, but without doing it you will have to run nvflash as root.
+==== Debian/Ubuntu Package ====
+Without any clear usage and redistribution license, nvflash cannot be distributed as a standard package.
+An installer package is available from here: http://share.grandou.net/debian/nvflash
+Here is how to install it:
+<code>
+$ cd /tmp
+$ wget http://share.grandou.net/debian/nvflash/nvflash_20110628-2_all.deb
+$ sudo dpkg -i nvflash_20110628-2_all.deb
+</code>
+nvflash is installed in /usr/bin/nvflash, and so can be run directly from your shell
+The bootloader is installed here: /usr/lib/nvflash/bootloader.bin
+The package takes care of installing an udev rules, allowing you to run nvflash as a normal user.
+====== nvflash setup ======
+  - Powerdown your AC100
+  - Connect the USB cable between your AC100 and the host PC
+  - press CTRL and ESC keys, and while maintaining them pressed, powerup your AC100
+  - the AC100 power white LED should light on, the screen remains switched off
+  - download the bootloader into the CPU RAM, on your host PC, type:
+<code>
+$ nvflash --bl /usr/lib/nvflash/fastboot.bin --sync
+</code>
+Note: adapt the command with real path of your fastboot.bin
+Now the AC100 is ready to accept commands from nvflash
+====== nvflash commands ======
+Write the image <filename> partition <N> of your AC100:
+<code>$ nvflash -r --download <N> <filename></code>
+Read the partition <N> from the AC100 to the file <filename>:
+<code>$ nvflash -r --read <N> <filename></code>
+For a complete description of nvflash commands:
+<code>$ nvflash --help</code>
-Note: currently, nvflash is only available for Linux or Windows. A Mac OS X version is not available.