Post by thread:[PIC]How to correctly handle dsPIC interrupts in a

I am working with the dsPIC30F2010. This chip is new to me. I have read the data sheet..family ref, etc. I have configured RE8 as an external interrupt (INT0) on rising edge. When the interrupt occurs the the correct interrupt flag is set and the chip then goes to what appears to be the start of the program. I am using the assembly template that Microchip supplies with MPLab. How exactly does one create an ISR for the dsPIC? In the 16F series it was an ORG <address> and that's where the ISR went. The dsPIC interrupt vector table says the address is 0x000014. I'm lost. Any pointers in the right direction would be appreciated. -- *Regards,* *Stephen D. Barnes*

Stephen D. Barnes wrote: > I am working with the dsPIC30F2010. This chip is new to me. I have read > the data sheet..family ref, etc. > I have configured RE8 as an external interrupt (INT0) on rising edge. > When the interrupt occurs the the correct > interrupt flag is set and the chip then goes to what appears to be the > start of the program. I am using > the assembly template that Microchip supplies with MPLab. How exactly > does one create an ISR for the > dsPIC? In the 16F series it was an ORG <address> and that's where the > ISR went. The dsPIC interrupt vector > table says the address is 0x000014. I'm lost. Any pointers in the right > direction would be appreciated. You don't need to mess with interrupt vector table manually, you just use the predefined interrupt labels from linker script (i.e. p30f2010.gld). I'm sure an example can be found in Microchip templates somewhere. Example for TMR1 interrupt: __T1Interrupt: PUSH.S ;TMR1 INT each 1ms, save context BCLR IFS0, #T1IF ;Clear TMR1 interrupt flag NOP ;Do something useful EndIntTMR1: POP.S ;Restore context RETFIE ;Done Djula

Aha! That points me in the right direction. Thank you very much. Djula Djarmati wrote: {Quote hidden}> Stephen D. Barnes wrote: > >> I am working with the dsPIC30F2010. This chip is new to me. I have read >> the data sheet..family ref, etc. >> I have configured RE8 as an external interrupt (INT0) on rising edge. >> When the interrupt occurs the the correct >> interrupt flag is set and the chip then goes to what appears to be the >> start of the program. I am using >> the assembly template that Microchip supplies with MPLab. How exactly >> does one create an ISR for the >> dsPIC? In the 16F series it was an ORG <address> and that's where the >> ISR went. The dsPIC interrupt vector >> table says the address is 0x000014. I'm lost. Any pointers in the right >> direction would be appreciated. >> > > You don't need to mess with interrupt vector table manually, you just > use the predefined interrupt labels from linker script (i.e. p30f2010.gld). > I'm sure an example can be found in Microchip templates somewhere. > > > Example for TMR1 interrupt: > > __T1Interrupt: PUSH.S ;TMR1 INT each 1ms, save context > BCLR IFS0, #T1IF ;Clear TMR1 interrupt flag > > NOP ;Do something useful > > EndIntTMR1: POP.S ;Restore context > RETFIE ;Done > > > Djula > -- *Regards,* *Stephen D. Barnes*