I ordered an espressobin. It seems like the new revision, the WAN port are separated from the 2 LAN ports. According to the documents, it sounds like it has been loaded with a firmware with U-Boot. But when I connected it using the mini-USB to my Linux host and power up, dmesg shows nothing happened, meaning it didn’t see a USB cable being plugged in. I supposed I should’ve gotten into U-Boot console, shouldn’t I, since it has U-Boot? I thought maybe the secure firmware just decided not to show anything since there is not sdcard plugged in yet. Then I just went ahead and created a sdcard loaded with kernel and rootfs (based on the book “Link Device Driver Development Cookbook”). Then I tried to boot the board with the sdcard and connected to the Linux Host using the mini-USB again, but dmesg still didn’t recognize a USB connection. On the board, I can see the Power LED was on, but the other 2 LEDS was dark all the time.
In this case, is it a problem of the firmware, do I need to burn the firmware myself? Can anyone tell me how to do that?