HET errors

Hello,

I am trying to program an HET for the TMS470R1B1M using IAR Embedded
Workbench. While in the debugger, I am seeing that it looks like the
different HET addresses are being accessed (HETADDR keeps changing
everytime or almost everytime I take a "next statement").  However, I
am not seeing my outputs and inputs (HETDOUT/HETDIN) change.  All the
program is supposed to be doing is changing 3 of the outputs from high
to low and back every half millisecond.  Is there something that I am
supposed to be initializing for my HET outputs and inputs to be
changing, other than HETGCR, HETPRY, and HETDIR?

An example of my initialization is:

HETinit.cpp

__no_init volatile HETPROGRAM0_UN e_HETPROGRAM0_UN @ 0x00800000;

void MemCopy32(unsigned long *dst, unsigned long *src, int bytes);

void HET_init()
{
HETGCR = 0x00000000;
HETPFR = 0x104;
HETDIR = 0x00000038;
HETDCLR = 0xFFFFFFFF;
MemCopy32((unsigned long *)&e_HETPROGRAM0_UN, (unsigned
long )HET_INIT0_PST, sizeof(HET_INIT0_PST));
}

void Interrupt_Init()
{
HETPRY = 0x381;
HETGCR |= 65541;
}

Currently, the reason I think that it might be an initialization error
of the ports is because in some examples that I have seen on the
example IAR code, I see a statement like "_disable_interrupt()", but I
have not been able to locate what this function does at the beginning
of the initialization.  Also, I have read that there could be a
REQMASK that I might need to set.

Best Regards,
Rudy