problem when changing from DTCM Ram to RAM_D1

[VYoun]

Hello,

I am writing a project with STM32H7. The project contains RTC, SPI, USART, SD Card, timers, and I2C.

In order to have more RAM, I have brough the data and bss to RAM_D1.

As next steps I want to implement Ethernet. However, I realized that in order for Ethernet to work, I need to only use RAM_D1.

The problem is when I bring the heap and stack to RAM_D1, the project stops working.

Can someone please help?

I include the linker script before and after bringing everything to RAM_D1.

Thank you in advance for your help.

[Tesla DeLorean]

Instrument code so you can identify where it stops working. Have Hard Fault and Error Handlers output actionable data.

Some memories require clocks to be enabled​

[TDK]

You need to update _estack to point to the end of the stack. It's still pointing at DTCM space. Pretty sure some malloc implementations don't like when the stack is below the heap.

[VYoun]

I am sorry but can you tell me what to exactly do? I am really new in this field.

Thank you very much

[VYoun]

Thanks a lot Clive, I will sure check.

[TDK]

Change

_estack = 0x20020000;

to

_estack = 0x30000000;

[VYoun]

thank you very much.

I did it but then everything stopped working. :(

[RMcCa · Accepted solution]

Single or dual core? If i needed extra ram for the m7 core i would use the axiram, not d2 sram​. As you have found out, the peripherals might need the d2 sram.

[TDK]

Sorry, meant 0x30020000, which is the end of SRAM1.