Motorola DSP56800 Guía de usuario descargar pdf (Pagina 395)

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Pragmas for the DSP56800 and DSP56800E

Pragma Reference

395Targeting MC56F83xx/DSP5685x Controllers

Listing C.12 Sample Code - #pragma interrupt on | off | reset

#pragma interrupt off // To be used as default

value

// Non ISR code

#pragma interrupt on

void ISR_1(void) {

// ISR_1 code goes here.

}

void ISR_2(void) {

// ISR_2 code goes here.

}

#pragma interrupt reset

If the pragma is inside a function block, compile the current routine as an interrupt

routine. If the pragma is not inside a function block, compile the next routine as an

interrupt routine. This concept is developed in Listing C.13

Listing C.13 Sample Code - #pragma interrupt and function block

// Non ISR code

void ISR_1(void) {

#pragma interrupt

// ISR_1 code goes here.

}

#pragma interrupt

void ISR_2(void) {

// ISR_2 code goes here.

}

#pragma interrupt off

See Listing C.14 for an example of using the 'called' option in the interrupt pragma.

Listing C.14 Sample Code - using the ‘called’ option in # pragma interrupt

extern long Data1, Data2, Datain;

void ISR1_inc_Data1_by_Data2(void)

{

/* This is a routine called by the interrupt service routine ISR1(). */

#pragma interrupt called

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