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Original question:

AM6442: Configure PCIe-RC in R5F

AM6442: Using PCIe interface with R5F

yuqiao wei
Prodigy 25 points
Part Number: AM6442


Tool/software:

Hi TI experts

I need to use PCIe interface with Xilinx FPGA xdma ip core with R5F to get enough real-time performance. The test under A53 Linux is ok, but when I use R5F AM64x MCU+ SDK: PCIE buffer transfer RC example, the link can't reach L0 and the status(ltssmStateReg.ltssmState) is always 'PCIE_LTSSM_POLL_COMPLIANCE', which is 0x03.

I have found a thread discussing very similar issue: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1440868/am6442-configure-pcie-rc-in-r5f  The reply is that MCUSDK based RC is designed to work with MCUSDK based EP only, not generic EP.

I also found a thread: https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1398510/tmds243evm-pcie-rc-read-ep-bar-info-stuck-243evm-intel-fpga  , I think in this example the link is established.

So I think although the api can't directly used for generic pcie ep, it's possible to set up link with some modify or I can write my own code.

Do you have any suggestion?

Thanks a lot

Yuqiao