AWR1843: QSPI flash address and write problem

Shawn Li(Radar)

Intellectual 875 points

Part Number: AWR1843

Tool/software:

Hi team,

I have below problem from my customer

#define SOC_XWR14XX_MSS_EXT_FLASH_BASE_ADDRESS 0xC0000000U

There is an address offset when accessing flash. I believe this is a way to manage a uniform address space, but when I check the QSPI driver, I find the address with offset is written in SPI register directly.

The flash address is started with 0x0, so there should be a mechanism to eliminate the address offset 0xC0000000U. But when I check the TRM, I don't find this.

Please help explain the mechanism, thanks.

The single_write function doesn't return value. So how to make sure this function is executed as our expectation? Like the single_write is operating the register and writing byte with correct manner?

Regards,

Shawn

1 month ago

0 Cesar 1 month ago

TI__Guru*** 148594 points

Shawn,

0xC0000000U is the R4F memory map for the Exterior Flash , as shown in the TRM.

We are not clear what your question is.

The flash address in the flash is starting at 0x0, however the address map from R4F is 0xC0000000

Thank you
Cesar

0 Shawn Li(Radar) 1 month ago in reply to Cesar

TI__Intellectual 875 points

Cesar,

You have pointed out the R4F memory address is different with Flash physical address. But I have understanded the mechanism. Thanks.

Please look into Question.2

0 Gabriel Gigliotti 1 month ago in reply to Shawn Li(Radar)

TI__Expert 3210 points

To verify your write you can access the memory browser on CCS to check the address you are writing to. You will be able to see new values once this function is run.

Best,

Gabriel

0 Shawn Li(Radar) 1 month ago in reply to Gabriel Gigliotti

TI__Intellectual 875 points

Gabriel,

So we don't have a mechanism to verify the writing result in our SDK or functions? If somebody wants to verify the result, they need to read the value and compare it with source data by themselves. Is it right?

Regards,

Shawn

0 Gabriel Gigliotti 1 month ago in reply to Shawn Li(Radar)

TI__Expert 3210 points

Hello,

You could use the QSPIFlash_singleRead() function to read that same written memory if you have not already taken a look at it. But, if this function is not what you are looking then yes you will have to look at the memory location in CCS and verify yourself.

Best,

Gabriel

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AWR1843: QSPI flash address and write problem