Technical information

Operating Precautions for CPDW9X/NT-CDR-V85X, Y-GHS-MULTI-V800

Customer Notification r20tu0003ed1812 52

No. a36

EP is not restored in ISR that calls func_ptr

Workaround

1. Compile with –no_prepare_dispose

2. Call a dummy function directly in the interrupt function. NOTE: this function may be optimised

away when the option -Ospace is used.

extern void (*const table[])(void);

void dummy(void) {}

void interrupt()

{

dummy();

table[0]();

}

3. Compile with the option –tda and put a dummy assignment to a TDA variable in the interrupt

function.

extern void (*const table[])(void);

#pragma ghs starttda

char dummy;

#pragma ghs endtda

#pragma ghs interrupt

void interrupt()

{

dummy = 0;

table[0]();

}