Hi Sauce.Cheng, Sauce.Cheng wrote: > my code run on the board reveal the info as following: > > Board: Motorola MPC8272ADS > DRAM: 32 MB > FLASH: 512 kB > In: serial > Out: serial > Err: serial > Net: FCC1 ETHERNET > bb_miiphy_write() > Hit any key to stop autoboot: 0 > => > > after i enter words like "ping 192.168.0.100",show something like this > PS. the line start as "chengmo" are debug infos > > chengmo : fec_init > chengmo 0 : rtx.txbd[0].cbd_sc : 00004c00 > chengmo 1 : rtx.txbd[1].cbd_sc : 00004c00 > Using FCC1 ETHERNET device > chengmo : fec_send > chengmo_b : rtx.txbd[0].cbd_sc : 00004c00 > chengmo_a : rtx.txbd[0].cbd_sc : 0000ec00 > fec: tx error > chengmo : fec_send > fec: tx buffer not ready > ping failed; host 192.168.0.100 is not alive > > eventually, show me that "fec: tx buffer not ready." > this prompt is in fec_send() in ether_fcc.c
[snip] > where the mistakes could happen ? i really cant find it. Your FEC (Tx) most likely is not being clocked. Check your QE clock configurations, verify that your PHY/MAC/??? is generating the correct clocks, etc. FWIIW, I had this happen on my board because the H/W designer strapped the PHY to power up with the clocks disabled (lowers power). I have to flip a bit in a PHY register to enable clocks. (I'm using a different processor and different PHY, YMMV.) HTH, gvb _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
