SW500007 Microchip Technology, SW500007 Datasheet - Page 82

• Manufacturer Part Number: SW500007
• Description: PICC-18 PRO
• Manufacturer: Microchip Technology
• Type: Compilerr
• Series: PIC18r

Specifications of SW500007

• Supported Families: PIC18
• Core Architecture: PIC
• Software Edition: Professional
• Kit Contents: Software And Docs
• Mcu Supported Families: PIC18
• Tool Function: Compiler
• Tool Type: Compiler
• Lead Free Status / RoHS Status: Not applicable / RoHS Compliant
• For Use With/related Products: PIC18 Series
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 015P; 778-1002; 778-1002

Interrupt Handling in C
Both the low- and high-priority interrupt functions may use the interrupt level feature.
3.10.5 Interrupt Registers
It is up to the user how they want the interrupt source configured. All the registers and bits associated
with interrupts are defined in the specific header file which can be accessed by including <htc.h>.
The following is an example of setting up the interrupts associated with the change-on-PORTB
source. Interrupt priorities are used and the interrupt source is made a low priority. See your PIC18
datasheet for more information.
68
#pragma interrupt_level 1
void bill(){
}
/* two interrupt functions calling same non-interrupt function */
#pragma interrupt_level 1
void interrupt fred(void){
}
#pragma interrupt_level 1
void interrupt joe(void){
}
main(){
}
void main(void){
}
void interrupt low_priority b_change(void){
int i;
i = 23;
bill();
bill();
bill();
TRISB = 0x80;
IPEN = 1;
PEIE = 1;
RBIP = 0;
RBIE = 1;
RBIF = 0;
GIEL = 1;
while(1)continue; // sit here and wait for interrupt
if(RBIE && RBIF){
// Only RB7 will interrupt on change
// Interrupt priorities enabled
// enable peripheral interrupts
// make this a low priority interrupt
// enable PORTB change interrupt
// clear any pending events
// enable low-priority interrupts
C Language Features