Hi, > > When insert to my laptop, there are two devices appeared > > as /dev/ttyUSB0 and /dev/ttyUSB1. It seems that both two ports are > > worked as serial ports. > > Hmm is that normal? I guess the EEPROM needs to be programmed so one > port acts as UART and the other as JTAG, no? And does the Linux driver > recognize FTDI JTAG ports as serial ports?
I don't know, I'll check the datasheet. > UrJTAG already supports FTDI JTAG adapters, so you should be able to > use the stock UrJTAG (check for packages for your Linux distribution) > and then run the "detect" command that will show the JTAG identification > code of the FPGA. > If it works, then you can compile Michael's modified UrJTAG that > supports configuration of the FPGA and writing of the board's flash. I'll try after I check the datasheet. > You can also check the UART functionality with a serial terminal > program at 115200 8-N-1 (e.g. GtkTerm), your board is already flashed > with MM SoC and it will display debug messages when you power it (if > not: press the middle pushbutton to start, newer versions of the SoC > require that and I don't remember which one was flashed). Use a > *regulated* (+/- 5%) 5V power supply adapter with the positive in the > middle. Ok, I'll. > Before connecting, check the voltages on the connectors (JTAG, > UART and supply) to be safe... Sure, I'll check all of them, I'm hardware engineer:-) > Hmm too bad... we'll need to find a clean way to fix this problem, > manually cutting each connector will be time consuming and won't look > good. Yes, we can't do that for bunch production, maybe find some short connector for J5 can fix it. > I think Michael will be interested as well; I can cheaply forward > him one since we now both live in Germany. Sure, that's why I'll send 3 to you. Regards, Yanjun Luo. _______________________________________________ http://lists.milkymist.org/listinfo.cgi/devel-milkymist.org IRC: #milkym...@freenode Twitter: www.twitter.com/milkymistvj
