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MCOUNSELL's avatar
MCOUNSELL
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7 years ago

alt_qspi_read() QSPI addressing problem

alt_qspi_read() is returning data from the QSPI address -1. I've written data to the QSPI by two different methods. quartus_hps.exe and also using alt_qspi_write function it in both cases the data ...
MCOUNSELL's avatar
MCOUNSELL
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

Hi JEKla,

I'm kinda pleased to hear that it's not just me..... maybe we'll get more help from Intel in this case....

What h/w are you using? Are you on the Intel/Atlera dev board?

Mike

MCOUNSELL's avatar
MCOUNSELL
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

I see, that's the same IC as I have on the Dev Kit board. My gut is that the Altera C code is to blame rather than the IC/board...... something in the QSPI indirect read code............. but no comment yet from Intel/Altera....

I've worked around the issue by adjusting the requests into alt_qspi_read(). I wrote a wrapper around this function and I read to address -4 with size +4. Hence I read the preceeding 4 bytes also.... then I pull out the data that I really want........ it's a total HACK of course but it is a reliable HACK for now until I find out the real source of the issue.

@INTEL ----- please give us some more input guys/girls.... your FPGA SoC is awesome.... loadsa folks wanna make solutions out of it and give you loads more money for these ICs but you really need to support us better..... pleeeease