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betontalpfa
Explorer
Explorer
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Registered: ‎10-12-2018

Zynq ps7_coresight_comp_0 stdio horribly slow

Hi,

I have a Zynq device, with a SW on it. I want to use the ps7_coresight_comp_0 as STDIO:

image.png

Zynq ARM  -->  ps7_coresight_comp_0  --> USB Blaster --> PC

It works, but it is horribly slow: about 50char/sec (400bit/sec) (It looks like a typing animation :( )

The jtag frequeny is 15000000

xsct% jtag targets
  4  Digilent JTAG-HS3 210299ABBAC9
     5  arm_dap (idcode 4ba00477 irlen 4)
     6  xc7z030 (idcode 1372c093 irlen 6 fpga)
        7  bscan-switch (idcode 04900101 irlen 1 fpga)
           8  unknown (idcode 04900220 irlen 1 fpga)
xsct% jtag targets 4
xsct% jtag frequency
15000000
xsct%

I use:

  • Win 10: (10.0.18363 Build 18363)
  • Vivado/SDK 2017.4
  • 7-series Zynq (xc7z030sbg485-2)
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