can many PCIE-device share IMX6Q's only one PCIE-BUS?

[翔李]

hi,

IMX6Q only has one PCIE bus,can i put 3 or more pcie-interface devices on this pcie bus?for example,IMX6Q---TW6869(pcie)---MINI_PCIE socket?

[igorpadykov · Accepted solution]

Hi 翔 李

for such purpose one can use PCIe switch like below

https://community.freescale.com/thread/324940

Best regards

igor

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[olegpereverzev]

I suppose you can do it implementing something like chipselect. You know, making the extension board with mcu/fpga, that will do the routing and chip selecting. You plug it in PICE, connect to several gpio pins, and it has several PCIE slots on it. When you do chip-selecting via gpio mcu/fpga do the bit stream routing to exact PCIE slot on board. Also buffer of incoming data and IRQ's. Quite a work, maybe more educated people can show you more adequate solution, don't hurry to close the question.

[翔李]

HI,

thanks.

i need use these 3 or more pcie-device at the same time but by this only one pcie-bus of IMX6Q.Does the stabdrad protocol of PCIE allow many pcie-device directly connect to onely one pcie-bus,share one pari T,one pair R,one pair CLK?

[olegpereverzev]

IDK, but as an food for speculation

http://www.ti.com.cn/cn/lit/ds/symlink/ts2pcie412.pdf

(sorry if links to TI are not welcome here)