RM48 EMIF Module in Halcogen

Martin,

I was able to test your code and I have some question and comments.

Which version of Halcogen are you using?

Concerning the heap size, when I've first try your sys_main, I was facing the same problem.
The calloc() are working fine, but after calling the realloc I was getting NULL pointer.

In my case, I did not specify any particular heap size. By default the linker uses 0x800 (bytes)
So that was my problem.

1] calloc(100, sizeof(int)) for tab you need 100 words (400 bytes)
2] calloc(100, sizeof(int)) for tab2 you need 100 words (400 bytes)
3] calloc(100, sizeof(int)) for tab3 you need 100 words (400 bytes)
4] calloc(100, sizeof(int)) for tab2 you need 100 words (400 bytes)
5] free(tab) deallocate 100 words
6] calloc(2, sizeof(int)) for tab you need 2 words (8 bytes) The pointer stays the same as per old tab.
7] realloc(150, sizeof(int)) for tab you need 150 words (600 bytes) This time the pointer has to move to a higher address.
8] realloc(150, sizeof(int)) for tab2 you need 150 words (600 bytes) This time the pointer has to move to a higher address.
now there is 100 + 100 words available at the address of first allocation for tab.
9] realloc(150, sizeof(int)) for tab3 you need 150 words (600 bytes) This time the pointer has to move to a higher address.
10] realloc(150, sizeof(int)) for tab4 you need 150 words (600 bytes) This time the pointer will be assigned at an address between the original tab2 and tab3.

So for the worst case, you need 400 + 300 words of heap (700 words -> 2800 bytes -> 0xAF0)

I think the runtime library also needs so heap size. In my test, I defined the heap to be 0xd00 and the code works fine.

In your original post, you defined a heapsize way bigger than the physical ram size on this device. I don't know why you are doing that.

In the sys_link, you should have:

/*----------------------------------------------------------------------------*/
/* Memory Map                                                                 */

MEMORY
{
    VECTORS (X)  : origin=0x00000000 length=0x00000020
    FLASH0  (RX) : origin=0x00000020 length=0x0017FFE0
    FLASH1  (RX) : origin=0x00180000 length=0x00180000
    STACKS  (RW) : origin=0x08000000 length=0x00001500
    RAM     (RW) : origin=0x08001500 length=0x00026B00

/* USER CODE BEGIN (2) */
/* USER CODE END */
}

/* USER CODE BEGIN (3) */
--heap_size 0xd00

/* USER CODE END */


/*----------------------------------------------------------------------------*/
/* Section Configuration                                                      */

SECTIONS
{
    .intvecs : {} > VECTORS
    .text    : {} > FLASH0 | FLASH1
    .const   : {} > FLASH0 | FLASH1
    .cinit   : {} > FLASH0 | FLASH1
    .pinit   : {} > FLASH0 | FLASH1
    .bss     : {} > RAM
    .data    : {} > RAM

/* USER CODE BEGIN (4) */
    .sysmem  : {} > RAM
/* USER CODE END */
}

Can you have a try with this definition and let me know the result?

Thanks and Regards,