We're developing an android tablet, derived from the am3517evm eval board. Our tablet uses NAND to store the firmware. We burn the board's NAND in our development lab successfully, but now we're exploring approaches for burning the NAND in the factory as well as by a customer when installing updates. So, we're looking for ideas on the best approach for this. We realize many others have the same need so have been down this path, but we haven't yet seen a good description of the options. During our development phase, we started by using the TI flash tool, and later used u-boot and the Linux, like this:
This approach gets us by for development, but it's too cumbersome and slow for use by either our factory, or for later updates by our customers. So, we're now looking for alternatives that are simpler and faster. I'm aware that Android has a recovery tool, and we're looking at that, even though it's not directly supported by the TI distribution. For a first cut, we're also looking for a simpler (and admittedly less flexible) approach to get us going, presumably leveraging existing utilities.Our thinking is to program the NAND by running scripts from Linux, booted from an SD card. We would store our u-boot, kernel, and rootfs images somewhere on the SD card, along with the scripts. The scripts would call up utilities to perform the NAND erase and burn procedure.My questions are:
Apporch which might help you..
- one can update NAND images ( x-loader,u-boot,kernel,file system etc..) using fastboot commands from host.
- Like found in phone, one can write a code into u-boot to detect certain combination of keypress, which will put device in fastboot mode. Then by connecting a cable to host pc, one can dowload required images to device.
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