AM623: OSPI Slave?

Antenna_Head

Part Number: AM623

Asking on behalf of customer:

we would like to use OSPI to transfer data between TI AM6234 (through DMA) with FPGA, we would like to understand if we can make FPGA as master instead of slave?

Should we create a flash like memory in FPGA to act like OSPI flash in slave mode in order to use OSPI?

Or FPGA can act as master and transfer data through OSPI?

It appears that in the QSPI.html doc in the Kernel drivers that OSPI and QSPI can only be used in master mode when used as a memory mapped IO interface. Is there some other mode OSPI could be used here that would allow AM623 to be a slave?

Thanks!

-Steve

over 3 years ago

0 Antenna_Head over 3 years ago

TI__Genius 13720 points

Team-

Can you please review and respond?

Thanks!

-Steve

0 Kallikuppa Sreenivasa over 3 years ago in reply to Antenna_Head

TI__Guru**** 235545 points

Hello Steve,

Thank you for the query and the note.

Please refer below.

3.2.2.13. OSPI/QSPI

Introduction

Octal Serial Peripheral Interface (OSPI) is a SPI module that has x8 IO lines. Quad Serial Peripheral Interface (QSPI) has x4 IO lines. These controllers are mainly used to interface with Octal or Quad SPI flashes. OSPI is backward compatible with QSPI. These modules can also work in dual (x2) and single (x1) modes.

OSPI and QSPI controllers on TI SoCs support memory mapped IO interfaces, which provide a direct interface for accessing data from the external SPI flash, thereby simplifying software requirements. These controllers work only in master mode.

https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/latest/exports/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/QSPI.html

Regards,

Sreenivasa

0 Kallikuppa Sreenivasa over 3 years ago in reply to Kallikuppa Sreenivasa

TI__Guru**** 235545 points

Hello Steve,

Please refer additional inputs i received.

The controller cannot operate in slave mode as it has no logic for it; data should never be sent to it unless it’s from a command that the controller issues itself (a read data command or read status register command for example).

Regards,

Sreenivasa

Processors

Processors forum

AM623: OSPI Slave?