H743 Ethernet RMII - how to configure RAM at 0x24000000?

[HMSEdinburge]

Hello.. i m working on Ethernet RMII on H743 nucleo, and encountered this error msg, could anyone advise how to configure RAM at 0x24000000? TQ!

 

 

[TDK]

The linker file (*.ld) in the directory of the generated code describes what memory is used for RAM. Probably it's pointing to 0x24000000 by default, as opposed to DTCMRAM or somewhere the DMA can't reach.

[mƎALLEm]

Hello,

I think the warning should be "The ETH can work only when RAM is not pointing to the DTCM-RAM" because ETH has no access to the DTCM nor ITCM.

So forget about that warning and just place your descriptors in SRAM_D2 for example (SRAM1, SRAM2, SRAM3). You can follow this article.

I will escalate that internally for modification and get back to you for any feedback. Internal ticket number 204183 not accessible by the community users.

[Karim BEN BELGACEM]

Or simply say:

"Ethernet RX and Tx descriptors needs to be placed in a RAM memory accessible by the dedicated Ethernet DMA"

 

[mƎALLEm]

Hello, Issue fixed in the CubeMx 6.15.0. 

Please check.

[pradyum]

Hi I am facing the same issue with H755ZI Nucleo in STM32CubeIDE 1.19.0 and STM32CubeMX 6.15.0

[mƎALLEm]

Hello @pradyum and welcome to the ST community,

This thread is closed. Please create a new thread and explain exactly what issue you are facing.