AM2431: How to handle OSPI0 and OSPI1

Hello Kanae,

The OSPI Controller can address one CS line at a time. We currently still in SysConfig do not support the addition of the same. That is we do not support multiple CS line addition.

But you can read through this to have an understanding of the pseudocode/logic to interface more than one CS lines for OSPI controller.

Please read through: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1415066/am6442-how-to-configure-multiple-chip-select-for-gpmc-ospi-in-sysconfig/5452304#5452304

Regards,

Vaibhav

Hi Vaibhav,

Thank you for your reply.

I understood that the OSPI controller can address one CS line at a time.
Our customer connects their device to OSPI.
Then he wants to connect a FlashROM to SPI.

He is running the device configuration in CCS,
but when he turns on the FlashROM, it adds to the number of OSPI used as follows.

If only one OSPI can be used, the FlashROM to be used this time is SingleSPI,
so if it can be used with SPI, it can be supported.
Is there a way to switch between the OSPI and SingleSPI?
Please let me know how to switch this.

Best Regards,
Kanae

Hello Kanae,

I see you want to connect a device to OSPI, so I am expecting this device/part to operate not in SPI mode, so you can go ahead and use the device by connecting it to OSPI.

When it comes to FlashROM, you mentioned that it needs to be operated in SPI mode, so you can connect it to MCSPI instead of OSPI, because two data lines which are D0 and D1 will be utilized for SPI operation.

So there will be no conflict.

Also when you add Flash tab, an OSPI tab gets added by default that is the reason you see one more instance getting added to OSPI(and currently we only have FSS_OSPI0 and no other OSPI instance).

Regards,

Vaibhav

Hi Vaibhav,

Thank you for your reply.

As you understand, we would like to use OSPI for the customer's device and McSPI for the FlashROM.
However, if we set it up that way,it will automatically set up OSPI and we will not be able to configure
the interface with the customer's device.
How can we configure the FlashROM to use McSPI instead of OSPI?
Is there something wrong with the configuration?

Best Regards,
Kanae

Hello Kanae,

Thanks for your response.

Kanae said:

How can we configure the FlashROM to use McSPI instead of OSPI?

I currently have no answer to this, as you would need to check the datasheet of the flashROM. Also make sure, to see if the flashROM supports MCSPI protocol or not.

Regards,

Vaibhav

Hi Vibhav,

Thank you for your support.

If the Flash ROM datasheet can be confirmed,
there is a possibility to connect Flash to McSPI, is that correct?
I will check the Flash ROM details with my customer.

Best Regards,
Kanae

Hello Kanae,

Thanks for your response.

Kanae said:

If the Flash ROM datasheet can be confirmed,
there is a possibility to connect Flash to McSPI, is that correct?
I will check the Flash ROM details with my customer.

That is correct.

Looking forward to your responses.

Regards,

Vaibhav

Hi Vaibhav,

Here is the customer's answer and question.

The FlashROM is AT25SF321B of Renesas.
https://www.renesas.com/ja/document/dst/at25sf321b-datasheet

VibeHub said.
I currently have no answer to this, as you would need to check the datasheet of the flashROM.
Also make sure, to see if the flashROM supports MCSPI protocol or Also make sure,
to see if the flashROM supports MCSPI protocol or not.

How would this configuration be done in CCS?
If the middleware cannot be used in the end, we will have to do the hard-coding,
but I think that I will have to configure it first.

Please let me know if there is anything else you need to check with the customer
other than the Flash ROM data sheet.

Best Regards,
Kanae

Hello Kanae,

I really appreciate your response.

I have gone through the datasheet and the pin description as well.

My current assumption is that you can pull the write protect and hold line high so that it is not in use and just use the clock, chip select, slave in, slave out, Vcc and Ground lines and just go ahead with MCSPI configuration in SysConfig.

But I am going to clarify on this in sometime. Is there a deadline under which you need to answer to this?

Looking forward to your response.

Regards,

Vaibhav

Hi Vaibhav,

Thank you for your reply.
I would appreciate an answer as soon as possible,
but when would be the earliest you could give me an answer?

Best Regards,
Kanae

Hi Vaibhav,

Thank you for your support.

The following site is not an example of a device used by our customers,
but I understand that you shared it with us as general information, is that correct?

electronics.stackexchange.com/.../can-i-program-a-quad-spi-chip-with-a-standard-spi-microcontroller Yes.,will%20work%20without%20any%20problem.

Vaibhav said;.
Apart from this we have previous customers as well, who earlier interface a quad flash and controlled it with MCSPI controller on our SoC.

Regarding the above comment, could you please share the actual device (Flash and SoC) used
and sysconfig configuration information?

Please let us know the workaround for the Sysconfig error that you inquired about in your first post.

Best regards,
Kanae

Hello,

Kanae said:

I understand that you shared it with us as general information, is that correct?

That is correct understanding.

Before proceeding further, I just want to make sure we are aligned on the design which you want to go ahead with.

Let me put up a sketch for you to view so that I can proceed with the configuration you can have.

Allow me sometime for this.

Regards,

Vaibhav

Hello Kanae,

Is the following feasible for your use case?

Looking forward to your response.

Regards,

Vaibhav

Hi Vaibhav,

Thank you for your support.

I will check it with my customer.

Best Regards,
Kanae

Hello Kanae,

I am looking forward to it.

Thanks,

Vaibhav