I have a device with a i.MX6 DualLite and eMMC for the primary storage device. When I initially booted the device it went into Serial Downloader mode and I used the MfgTool2.exe to flash in a valid image, once the tool completed I verified that I was able to successfully boot to the device.
Now I would like to return to Serial Downloader mode so that I could try out different images. How can I do that? When I boot now it no longer jumps to the Downloader because there is a valid image.
My first thought was to delete the Bootloader partition such that it would not find a valid image. I attempted this via:
=> mmc erase 2 8
MMC erase: dev # 0, block # 2, count 8 ...
Caution! Your devices Erase group is 0x400
The erase range would be change to 0x0~0x3ff
8 blocks erased: OK
However after rebooting I'm still seeing u-boot come up successfully, (however the kernel is now gone).
What way can I get my device back into Serial Downloader mode to reflash it?