AM4372: OSPI in memory mapped mode

Sh.Sasaki

Guru 13625 points

Part Number: AM4372

Hi everyone,

What is the length of the frame when QSPI reads in memory mapped port?

About the restriction on writing by QSPI, it was able to know from the following link.

https://e2e.ti.com/support/processors/f/791/p/667857/2540557

Best regards,

Sasaki

over 6 years ago

0 PaulM over 6 years ago

TI__Mastermind 28125 points

Sasaki

We should be able to get you an answer on Thursday.
Thanks for you patience !

0 melissaw over 6 years ago in reply to PaulM

TI__Genius 15920 points

Sasaki-san,

The restriction described in the link you shared only applies to QSPI writes.

There is no such restriction on read transactions.

Regards,
Melissa

0 Sh.Sasaki over 6 years ago in reply to melissaw

Guru 13625 points

Hi Melissa-san,

Thank you for your support.

melissaw said:

There is no such restriction on read transactions.

I got it.

sasaki said:

What is the length of the frame when QSPI reads in memory mapped port?

What is the answer to the above?

Best regards,

Sasaki

0 melissaw over 6 years ago in reply to Sh.Sasaki

TI__Genius 15920 points

Hi Sasaki-san,

The frame length will be determined by the data type (i.e. used uint16_t, uint32_t, etc.) used by your software.

Also, the Processor SDK RTOS has a "QspiLibMemMapRead" function that you may find helpful. It's located in packages\ti\starterware\library\qspilib\qspi_lib.c within the SDK package.

Regards,
Melissa

0 Sh.Sasaki over 6 years ago in reply to melissaw

Guru 13625 points

Hi Melissa-san,

Thank you for your support.

I understood it.

Best regards,

Sasaki

Processors

Processors forum

AM4372: OSPI in memory mapped mode