TMS320F28P659DK-Q1: How to trigger a ITRAP

Thanks for your help. It is really the easiest way to execute TRAP #19

void trigger_trap19() {
asm(" TRAP #19 ");
}

Could you please help check the below question?

Is something wrong with my method?

I want to test that access to an invaild memory, then enter into the illegal interrupt.

volatile uint32_t *TestOverRangePoint = (uint32_t *)0xFFFFFFFF;
volatile uint32_t TestData = 0;

for (;;)
{
*TestOverRangePoint = 0x01;
TestData = *TestOverRangePoint;

}

Hello, Could please help reply?

Hi WZ,

W Z said:

I want to test that access to an invaild memory, then enter into the illegal interrupt.

Can you point to the reference document for the statement above ?

From C28x Guide I only see the below source for ITRAP:

Thanks

The first one, invalid addressing mode. Is there document that clarify more inforamtion about invalid instruction, and when the opcode value is 0x0000  and 0xFFFF 

WZ,
That's is Illegal value read from program memory during an instruction fetch. 

Illegal OPCODE fetch values are 0000, FFFF, or any value that does not match a defined opcode.

Thanks.

I cannot understand, what is illegal value read from program memory. Could you please show an example?

Got your OPCODE define.  But When do the normal coding, how can bring in a not defined opcode?

WZ,

In a case where you start executing from memory which has either all 0000 or FFFF unintentionally then you may end up getting ITRAP

Here is a scenario explained in this e2e : https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1313506/tms320f28335-28335-illegal-instruction-execution-problem/4992071#4992071

Thanks