Today is the year of 2024. STM32CubeProgrammer fails to report correct flash size of STM32F767ZG

[arro239]

expected: tools report 1Mb flash
actual result: tools report 2Mb

 

note wrong in bottom-right corner

 12:06:56 : STM32CubeProgrammer API v2.17.0 | Windows-64Bits 
 12:07:04 : UR connection mode is defined with the HWrst reset mode
 12:07:05 : USB speed : Full Speed (12MBit/s)
 12:07:05 : Manuf. ID : STMicroelectronics
 12:07:05 : Product ID : STM32 BOOTLOADER
 12:07:05 : SN : 20663077464B
 12:07:05 : DFU protocol: 1.1
 12:07:05 : Board : --
 12:07:05 : Device ID : 0x0451
 12:07:05 : UPLOADING OPTION BYTES DATA ...
 12:07:05 : Bank : 0x00
 12:07:05 : Address : 0x1fff0000
 12:07:05 : Size : 44 Bytes

[TDK]

I don't think DFU queries the chip at all to determine this, hence the "default". Does it show correctly with an SWD interface?
Is this breaking anything?

[STOne-32]

Hi @arro239 ,

 

Try to read STM32F75xxx and STM32F74xxx advanced Arm®-based 32-bit MCUs - Reference manual   The Flash register size @1FF0 F442 .

USB DFU protocol inside STM32 boo-loader can not read that address so the Cube Programmer is guessing it using the superset device flash size.

Hope it helps.

STOne-32

 

 

[arro239]

If you guys _knowingly_ guess please consider making this more obvious. For instance please consider stating "Unknown" or "1/2mb" or something along these lines.

 

I am really concerned by the official guessing. See my other posting regarding way more critical defects hopefully it's not the same guessing in those other cases.

[STOne-32]

Hi @arro239 ,

We appreciate this feedback, but please let us know if you are able to connect via SWD instead of Bootloader DFU or not possible to do by your hardware. This is to understand if the Register size is showing 2MBytes or 1Mbytes, we have seen that in the past and can be a quality issue . So we wanted to be sure before escalating to our CubeProgrammer developpers on how to enhance that in future.   Thanks again for the valuable feedback.

Cheers,

STOne-32.

[arro239]

SWD shows 1MB as expected. Hopefully this would help remove the confusion which is caused by DFU guessing instead of officially stating inability to identify. Again, see my other defect reports I wonder if those are also a consequence of guessing instead of requesting additional user input.

 

[STOne-32]

Hi @arro239 ,

Very clear and thank you.  we will process that with other threads and back to you the soonest. we logged that in our internal tracking system using this #187869.

Cheers,

STOne-32.

[arro239]

PS: note how "Bootloader Version" shows "--" while using DFU, should same "--" be reported as flash size while in DFU for this chip?