TMS320F28P650SH: Fail to Start RAM Initialization - ITRAP

Fengyu Leng

Intellectual 1910 points

Part Number: TMS320F28P650SH

Tool/software:

Hi Champ,

My customer use below code to start ram initialization. We find if we put below code at the at the beginning of main(), everything works well.

    EALLOW;
    *(volatile int *) (MEMCFG_BASE + MEMCFG_O_DXINIT)  = 0x0003;               /* RAM INIT FOR M0/M1 Memory      */
    while(!(*(volatile int *) (MEMCFG_BASE + MEMCFG_O_DXINITDONE) == 0x3));   /* Wait for InitDone Status       */
 
    *(volatile int *)(MEMCFG_BASE + MEMCFG_O_LSXINIT) = 0x00FF;               /* RAM INIT FOR LS1..LS7  Memory  */
    while(!(*(volatile int *) (MEMCFG_BASE + MEMCFG_O_LSXINITDONE) == 0xFF)); /* Wait for InitDone Status       */
 
    *(volatile int *)(MEMCFG_BASE + MEMCFG_O_GSXINIT) = 0x000F;               /* RAM INIT FOR GS0.GS3 Memory    */
    while(!(*(volatile int *) (MEMCFG_BASE + MEMCFG_O_GSXINITDONE) == 0xF));  /* Wait for InitDone Status       */
    EDIS;

But when we change the position, put the code after the peripheral initialization like below, it will trigger ITRAP interrupt when we execute code of start RAM initialization.