SDRAM writing problem on Hercules HDK

Hi Pierre,

  Can you show the disassembly of these writes? Do they contain any STMxx (Store Multiple) type of instructions? I wonder if you are hitting the below errata.

Hi Pierre,

  I don't see the problem. I tried to mimic your setup. I ran the code without single stepping. Perhaps you can share your code with me. 

void main(void)
{
/* USER CODE BEGIN (3) */

	emif_SDRAMInit();

		*(uint32 *)0x80000000 = 0x12345678;
		*(uint32 *)0x80000004 = 0x87654321;
		*(uint16 *)0x80000008 = 0x1111;
		*(uint16 *)0x8000000A = 0x2222;



	while(1);

/* USER CODE END */

Hi Charles,

Please find attached an example, the problem is located writing "pAssembly" in the function Init in writebuf.c .

Regards,

Pierre

1738.ti_example.zip

Hi Pierre,

 I was not able to run your program for some reason. If I put a breakpoint at memset() inside the writebuf.c it will not stop there. Perhaps it has something to do with the OS. However, I quickly looked at the writebuf.c. You have a memset() which is going to create STM instructions that will run into the mentioned errata. Please also look at the below two relevant posts.

ASSEMBLY     gAssemblies[128];

CPU_INT32S init(void) {

ASSEMBLY* pAssembly;

pAssembly = gAssemblies;

memset( pAssembly, 0, sizeof(ASSEMBLY) );

   pAssembly->iInstance = 102;

   pAssembly->nOffset = 192264;

   pAssembly->iSize = 2;

   pAssembly->iType = 9;

   return 0;

}

Hi Pierre,

  Glad your problem is solved.