Heap usage memory RT1050 handling / External SDRAM

[rubensjunior]

Dear colleagues!

I need to place the heap section to the BOARD_SDRAM. It is on the SRAM_OC currently. How I do?

Bellow is my actual memory use.

Thanks a lot!

Rubens Júnior.

[Takashi_Kashiwagi · Accepted solution]

HI Rubens-san

you can change the region of Heap in "Project Poperties->C/C++ Build->Settings->MCU Linker->Managed Linker Script".

Please set Region to "BOARD_SDRAM".

Best Regards,

T.Kashiwagi

[ian_l]

Hi,

I created a simple project in MCUXpresso  v11.1.0 [Build 3209] using the new project wizard with all default settings, and changed the heap to use SDRAM as shown above. However as soon as the heap allocation function is called, the program jumps to HardFault_Handler.

This is tested on the RT1050EVKB. And I have the script found in another in the debug config (see screenshot below).

Here is the main function. Please advice, thanks.

int main(void) {

/* Board pin init */

BOARD_InitPins();

BOARD_InitBootClocks();

/* Update the core clock */

SystemCoreClockUpdate();

float* data1 = (float*)malloc (256); // this will cause the jump to HardFault_Handler

free (data1);

}

[Takashi_Kashiwagi]

Hi Lan-san.

• How many is the Heap Size? (The image I uploaded is 0 :smileycry:. Please set a valid value such as 0x1000)

In addition, In the case of the sample project, when HardFault is performed, HardFault_Handler of semihost_hardfault.c is executed.

With Hardfault_Handler, you can analyze the PC and SP for the instruction that caused the hard fault. Please check the values.

Best Regards,

T.Kashiwagi

[rubensjunior]

Hi @takashi kashiwagi,

Thank you very much for your help. The result was positive.

Best Regards,

Rubens Júnior