Problem booting BBB using Micro SD card

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1

After I messed up uEnv.txt on eMMC I am trying to burn image in Micro SD and boot BBB this way but no luck.

These are the steps I did:

I downloaded bone-debian-7.5-2014-05-14-2gb.img.xz.
Extracted to bone-debian-7.5-2014-05-14-2gb.img
From Ubuntu Host machine executed: sudo dd if=bone-debian-7.5-2014-05-14-2gb.img of=/dev/sdc bs=1M
After some time about 681 MB size image is written to Micro SD card. Now I am assuming this image has everything you need. kernel, filesystem and bootloader and I DO NOT have to manually make partitions (for kernel, fs and swap) on the SD card. Please verify.
Then I plug in the Micro SD card to the BBB and attached my USB cord from Host to target while pressing on S2 boot button. I also tried using 5V power supply.
All 4 LEDS flashed after a minute only fourth LED flashes interval of a second. LED next to 5V power supply is solid lit.
May be BBB booted with Linux but I have no way of knowing. I can not see it through my COM port (before when booted with eMMC I could see the COM port and connect to BBB with terra term).
I really wished BBB had serial port like most boards have.
Another question is I do not want Linux kernel loaded from either eMMC or MicroSD card I want to setup NFS and tftpboot for that I want to prompt on uboot. How can I do that?
Thanks

2

It does have a serial port.
Software name ttyO0, Hardware name: Serial Debug Header.
See SRM (System Reference Manual) page 90.
Purchase an FTDI TTL-232R-3V3 to talk to it.

I can’t imagine working on or programming a BBB without one.

If you live in the US, or can easily order from the US, get one from Mouser.com
Mouser part number: 895-TTL-232R-3V3 $20.

— Graham

3

If in the UK then you can get one from amazon http://www.amazon.co.uk/gp/product/B00FB60N5A?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00

I had the same issue of not reprogramming the mmc...
The solution that worked for me was to format the sd card and put latest version of debian....

Hope this helps...

4

If you are from India where to find this FTDI adapter?