Hi, Op 30-08-10 12:00, Dr. H. Nikolaus Schaller schreef: >> I don't want to discourage you, but I would advise to see if the Jz4730 >> of the mipsbook can be unbricked in the same way. According to > > It can't. The difference is that the jz4740 has an internal boot ROM that > handles all this. The jz4730 doesn't. I.e. it simply starts execution of > code at address 0x0000000 (or similar). This is connected to NAND > flash. If that part of NAND flash is broken, only JTAG remains.
That's strange. So the BOOT_SEL and UDC references in Ingenic's jz4730 kernel sources are just copied and not really present on the chip? Or are they just not present in the hardware we have? Nils wrote: > Been there, tried that ;) > The specs are pretty clear about that - the JZ4730 does *not* support > USB booting, the 4740 does. For the 4740 I got a programmer's manual through the qi hardware people. Do you have a similar document for the 4730? I would very much like to have it! >> I opened my mipsbook, and found a header which seems to be for a >> mini-USB-B connector (so to make the mipsbook use the device port). If > > You mean the 4-pin connector near a reset button? > This is a RS232 console interface (needs a adapter). No, as was already pointed out, my epc-700 has an empty usb connection spot. I already understood it's just another host port, not a device port. Pity. > Unfortunately, if U-Boot is damaged there is *only* JTAG remaining. I hope > that I receive my adapter PCB today so that I can solder the connectors > and connect it to the Openmoko Debug Board. Then, we will see... Good luck with that! Thanks, Bas
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