Hi,
On Thu, Oct 09, 2008 at 01:01:04PM +0800, Liu Dave-R63238 wrote:
Hello Anton,
I strongly suggest you use the hardware reset configuration word from flash, not from FPGA.
Well, then we always have to re-flash the u-boot for every change of the SGMII/RGMII setup... not very convenient. :-/
Other option is to use I2C EEPROM as a HRCW source, and change SGMII/RGMII setup there. But this feels quite hackish... Never tried this approach though.
You can set the PCI host and internal arbiter enabled in the HRCW in flash to avoid these issue.
Luckily there is easy workaround for this problem.
Also, I strongly suggest you use the production 837xEMDS pilot rev2.05 board. Because the early 837xEMDS board is missing PCI bus pull up resistors.
Much thanks for the information.