IRQ0 ADSP21488

Hi I am Hiroki.

I have any open issue with IRQ0 - I am working with ADSP-21488.
I want to configure this pin as hardware interrupt and the process I did is as follows:

*pSYSCTL |= IRQ0EN;
asm( "bit set mode2 IRQ0E;"); // EDGE SENSITIVE
interrupt( SIG_IRQ0, MyFunc );
sysreg_bit_set( sysreg_MODE1, IRPTEN );

Use the debugger inside main-When an interrupt occurs, the program jumps to the beginning of main instead of MyFunc outside main.
Note that even if a breakpoint is set in MyFunc during debugging, it does not move to MyFunc .
If the IRPTL register is monitored during debugging, “IRQ0I”, which is the 10th bit of the IRPTL register, becomes “1” at the same time that IRQ0 is received. After that, when jumps to the beginning of main, “IRQ0I” becomes “0”.
what is my mistake?

Hiroki