PCIe Hardip going from x1-to-x4 Error "transmit_pcs0" has illegal fan-out

Altera_Forum · ‎06-05-2013

Hi all,

I have a design with a PCIe HardIP in Stratix IV, both RootP and EndP which work fine as Gen-1, X1.

Now I am trying to upgrade and go for Gen-1, X4 while keeping everything the same (125Mhz clock, 64Bit FIFO, etc.)

So when I compile I get this error:

error (15798): output port hiptxclkout of gxb transmitter channel pcs atom "transmit_pcs0" has illegal fan-out to input port pclkcentral of atom "pcie_mgwz_rp_plus:rp|pcie_mgwz_rp:rpmap|pcie_mgwz_rp_core:wrapper|altpcie_hip_pipen1b:altpcie_hip_pipen1b_inst|stratix_iv.stratixiv_hssi_pcie_hip". the output port can drive only port pclkch0 of hssi_pcie_hip atom

error (15792): output port hiptxclkout of atom "transmit_pcs0" cannot drive multiple destinations. it must drive only one pclkch0 input port of hssi_pcie_hip atom

This looks like an internal IP problem which is under the Wizard's control, no?

Can you help?

Thanks,

Shvitzer

Altera_Forum · ‎06-06-2013

The solution is to simply delete the serdes BEFORE regenerating the new PCIe ! Altera Wizard does not do it...

Cheers

Shvitzer