Difference between ss and SPISEL in the XSPI

Good Day

I am working with ZEDBOARD ,I want to use AXI Xspi as a slave ,I don't know the difference between SS and SPISEL .which one should I use as chip select ?.

Thanks in advance
Jassim

0 Former Member over 11 years ago

my best guess is ss for chip select
are you finding any difficulties with the forwarding SPI to EMIO??
I am trying to forward it to PS PMOD (MIO) but its giving me a headache! have you tried that before?
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0 Former Member over 11 years ago

Hi Joe,

You don't say what version of the tools you are using. I started with ISE 14.4 and connected through the EMIO ports. I just check the MIO ports and you're lucky. They are in the correct pin order to connect the pMod SPI device.
JE1 A6 MIO-13 SS
JE2 G7 MIO-10 MOSI
JE3 B4 MIO-11 MISO
JE4 C5 MIO-12 CLK
The bad news is that I had to debug the spips library. The library from ISE 14.6 might work better. I copied the library routines to my own source directory and then modified them. I have submitted my changes to Xilinx and the indication is that they will be included in ISE 14.7.
That being said, the routines in the 14.6 library are probably good enough for what you need to do. I was implementing features that the library didn't support yet.

Good Luck,
Mike
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0 Former Member over 11 years ago

Hi Jassim,

On page 2 of ds742_axi_spi.pdf it says the slave select line is SPISEL.

Good Luck,
Mike
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0 Former Member over 11 years ago

Hi Mike,

I am using 14.2.
Can you please send me your modified libraries? maybe i can use them!
ybadran@gmail.com

Thanks for the help
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