Compiler/MSP432E401Y: Store code to External RAM / Execute code from External RAM

Mathankumar Raja

Prodigy 60 points

Part Number: MSP432E401Y

Tool/software: TI C/C++ Compiler

Hi,

I am using External SRAM part # IS62WVS2568GBLL-45NLI-TR with MSP432E401Y MCU (FreeRTOS).

I can write and read the data over SPI and QSPI.

I have modified the linker command file and GEL file as for external SRAM.

But still, I am not able to execute the code from External SRAM.

so,

1.Can you give use cases for this MCU with FreeRTOS.

2.Is there any configuration needed for making a working module (Other than the Linker command file and GEL file ( Please give a reference file with external RAM of linker command file and GEL file) ).

3.If not possible to execute code from External RAM. is it possible to store .bss and .data in External RAM.

over 5 years ago

0 James Evans over 5 years ago

TI__Mastermind 49692 points

Hello,

According to Chapter 16 External Peripheral Interface (EPI) in the MSP432E4 SimpleLink™ Microcontrollers Technical Reference Manual, the EPI memory interface supports contiguous memory access independent of data bus width, thus enabling code execution directly from synchronous dynamic random access memory (SDRAM), synchronous random access memory (SRAM), and flash memory.

You will probably need to configure the EPI to use the external SRAM, not the linker files.

Also, the MSP432E411Y-BGAEVM may be a good reference for you although the external memory seems to be used for data logging.

Regards,

James

0 Mathankumar Raja over 5 years ago in reply to James Evans

Prodigy 60 points

Hi James,

Thanks for your reply

In my case, I have used EPI pins for some other purpose. so now I don't have free EPI pins.

That's why I am looking for support on External SRAM over QSPI.

so can you give support to the above-asked questions?

Best Regards

Mathankumar Raja

0 James Evans over 5 years ago in reply to Mathankumar Raja

TI__Mastermind 49692 points

Hello,

Without using the EPI, I don't think this is possible. You can use this external memory for data logging but not for code execution.

Regards,

James

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Compiler/MSP432E401Y: Store code to External RAM / Execute code from External RAM