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senjd's avatar
senjd
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6 years ago

How can i use Quad SPI to talk with Flash memory ?

I am trying to access Flash memory (MT25Q128) by using Quad SPI Ip (AS x4). I am driving Quad SPI from PCIe. But i didn't understand the sequence to follow from IP document. Quad SPI does have two ...
Ahmed_H_Intel1's avatar
Ahmed_H_Intel1
Icon for Frequent Contributor rankFrequent Contributor
6 years ago

Hi,

The following are a very useful examples show how to deal with PCIe and external memory, please check:

  1. https://fpgacloud.intel.com/devstore/platform/17.0.0/Standard/pcie-avmm-dma-gen2x4-on-chip-and-external-memory/
  2. https://fpgacloud.intel.com/devstore/platform/18.0.0/Standard/pcie-avmm-dma-gen3x8-on-chip-and-external-memory/
  3. https://fpgacloud.intel.com/devstore/platform/19.1em1.0/Standard/pcie-avmm-dma-gen3x8-on-chip-and-external-memory/
  4. https://fpgacloud.intel.com/devstore/platform/16.0.2/Standard/an708-pcie-gen3x8-avmm-dma-with-external-memory/
  5. https://fpgacloud.intel.com/devstore/platform/16.1.0/Standard/an708-pcie-gen3x8-avmm-dma-with-external-memory/
  6. https://fpgacloud.intel.com/devstore/platform/17.0.0/Standard/an708-pcie-gen3x8-avmm-dma-with-external-memory/

Please let me know if you need more support.

Regards,

senjd's avatar
senjd
Icon for New Contributor rankNew Contributor
6 years ago

Hi @AhmedH_Intel​ ,

Thanks for your reply. This projects are connecting PCIe with external memory. I am trying with PCIe bar4 connecting to Quad SPI interface (CSR + MEM ports). I tried to run following commands on qspi ip using pcie to write something on flash memory.

but i feel i am missing something

control reg [7] = 0x6

control reg [8] = 0x1

control reg [7] = 0x1001

control reg [A] = 0x7C

control reg [8] = 0x1

//WRITING DATA TO MEMORY PORT OF QUAD SPI IP.

MEM [0] = 0x1

MEM [1] = 0x2

On the output side i am getting csn high-low pulses for sometime. & outdata of qspi changes between 0xEh & 0xFh.

Any help appreciate most.

Is there any other registers i need to take care for writing the data?

Thanks