BF707 EZ-KIT SPI Flash read/write in DMA mode

Hi,

Apologies for the delay.

We have attached one example code for the Flash read/write in BF707 EZ-KIT using SPI DMA mode.

BF707_DMA_Flash.zip

Regards,
Anand Selvaraj.

Hi Anand,

Thanks for the reply and the sample code. I had already found the issue with my code and fixed it.

Currently I am facing issues with the Quad SPI mode with DMA enabled. I am getting Zeros when the Quad mode is enabled for  flash read (therefore I am not able to verify the write). Could you suggest a solution for this?

Hi Anand,

Thanks for the reply and the sample code. I had already found the issue with my code and fixed it.

Currently I am facing issues with the Quad SPI mode with DMA enabled. I am getting Zeros when the Quad mode is enabled for  flash read (therefore I am not able to verify the write). Could you suggest a solution for this?

Hi,

Thanks for your update.

Can you confirm whether you have configured the softconfig switches (U3, U4, U5) in your code.

I have attached SPI flash Quad mode example code for ADSP-SC589 processor. This can be directly run on ADSP-SC589 Ez-Kit.

You can refer this code.

SPI_Quad_flash.zip

Regards,
Anand Selvaraj.

Hi Anand,

Unknown said:

Can you confirm whether you have configured the softconfig switches (U3, U4, U5) in your code.

Yes I did. So can you please clarify what difference does it make for the QUAD SPI with DMA enabled?

Unknown said:

I have attached SPI flash Quad mode example code for ADSP-SC589 processor. This can be directly run on ADSP-SC589 Ez-Kit.

Thanks. I am using BF707 EZ-KIT. I presume I have to modify the code for the BF707. 

In the code you have shared, I could see the DMA is configured only for the Rx but not for Tx. Does that mean the DMA + Quad mode won't work?

Hi,
 
For Quad mode, SPI data lines D2 and D3 will not connect to Flash, if we didn't configure the soft config switches(U4, U5).

And DMA can be used to read data from the flash memory but writing data to the flash device using DMA is not possible because writing to flash requires sending a series of commands to flash device the timing of which may not be met when using DMA.

Regards,
Anand Selvaraj.

Unknown said:

DMA can be used to read data from the flash memory but writing data to the flash device using DMA is not possible because writing to flash requires sending a series of commands to flash device the timing of which may not be met when using DMA.

This is only in the case of DMA + QUAD SPI Mode, correct? because, I was able to write to flash in DMA + STD SPI mode using the ADI SPI device driver. And in this case the time taken for a page write is twice as that with DMA disabled. 

Hi,

Apologies for delayed response.

Were you able to get going.

Please let us know if you are still facing any issue.

Regards,
Anand Selvaraj.