TMS320F28377D: CPU2 to CPU1 IPC MSG RAM access

Hello,

I need to exchange values between CPU2 and CPU1 (CPU2 write data and CPU1 get it)

To begin, I don't want to use all IPC functions, I just want to write directly in the message RAM (CPU2TOCPU1RAM).

• On CPU2 side, I write directly two values on CPU2TOCPU1RAM.

CPU2 .cmd file : (not full file, just concerned lines) :

    CPU2TOCPU1RAM   : origin = 0x03F800, length = 0x000400
    
    BufferTest : > CPU2TOCPU1RAM		PAGE = 1

CPU Main file (not full Main, just concerned lines) :

    #pragma DATA_SECTION(CPU2Values, "BufferTest");
    Uint16 CPU2Values[2];
    
    CPU2Values[0] = 0xAAAA;
    CPU2Values[1] = 0x5555;

It works, I can find good values in the Memory Browser at the right address ( 0xAAAA at @0x03F800, 0x55555 at @0x03F801)

• On CPU1 side, I did the same thing for the .cmd file :

    CPU2TOCPU1RAM   : origin = 0x03F800, length = 0x000400
    
    BufferTest : > CPU2TOCPU1RAM		PAGE = 1

• For the main :

    #pragma DATA_SECTION(CPU2Values, "BufferTest");
    Uint16 CPU2Values[2];

    unsigned int CPU2Value1 = 0;
    unsigned int CPU2Value2 = 0;
    
    CPU2Value1 = CPU2Values[0];
    CPU2Value2 = CPU2Values[1];

In the Memory Browser, I can find good values at the right address ( 0xAAAA at @0x03F800, 0x55555 at @0x03F801), but all the four variables are equal to zero (CPU2Values[0],CPU2Values[1], CPU2Value1 and CPU2Value 2).

Do you know why ?

Thank you.

Regards,