Hello,
I am currently using u-boot version 0.4.0 for the MPC8260ADS board. I am trying to use the additional code in cpu/mpc8260/ether_fcc.c to do the ethernet loopback test. I already added the configuration for the MPC8260ADS to connect FCC's tx and rx clocks with the following code:
#elif defined(CONFIG_MPC8260ADS) /* * Attention: this is board-specific (only using FCC2) * - FCC2 Rx-CLK is CLK13 * - FCC2 Tx-CLK is CLK14 */
/* 28.9 - (3): connect FCC's tx and rx clocks */ immr->im_cpmux.cmx_uar = 0; immr->im_cpmux.cmx_fcr = CMXFCR_RF2CS_CLK13|CMXFCR_TF2CS_CLK14; #else #error "eth_loopback_test not supported on your board" #endif
Well, I compiled it and run the test itself by creating a command for it (just like ping or mtest) for my own testing and not through "post".
Here's the questions. Does the eth_loopback_test() in cpu/mpc8260/ether_fcc.c needs to have a loopback cable connected to the ethernet port [crossing pin 1 (TX+) and pin 3 (RX+) together and cross pin 2 (TX-) and pin 6 (RX-) together]? Or is it supposed to be run connected directly to the network?
I tried both ways and couldn't tell which one is correct or if I need to modify something else in the code to make it work properly. Both have Receive errors in it. (Are we supposed to get RX errors?)
Any help is appreciated.
Thanks.