TMR4_INT -- TMR4 - PR4 Match

Uses PIR3,TMR4IF, PIE3,TMR4IE Registers and Control Bits.

DT's Interrupts MUST be used with PicBasic Pro and MPASM.

The following block of instructions will establish the interrupt used and the PBP label (your ISR) to jump to once interrupt occurs. Remember; all PBP labels or variables used inside ASM code blocks must be preceded by the underscore,( _TimeOut). All instruction to the interrupt processor should be in ASM and preceded by the @ symbol and to the far left column of the editor if not included in other ASM code blocks.


 INT_LIST     macro     ;IntSource      Label,    Type,    ResetFlag?
            INT_Handler   TMR4_INT     _TimeOut   PBP       Yes
            INT_CREAT               ;Creates the interrupt processor
            INT_ENABLE    TMR4_INT  ;enables TMR4 interrupts


Command functions:
INT_CREATE ;Creates the interrupt processor
INT_ENABLE TMR4_INT to enable TMR4 interrupt
INT_DISABLE TMR4_INT disable TMR4 interrupt.
INT_CLEAR TMR4_INT -- clear flags
INT_RETURN ------------- To restore and return to the program where interrupt was made.

NOTE: See datasheet for specific details of operation.

The Timer2/4/6 output signal (TMRx-to-PRx match) provides the input for the 4-bit counter/postscaler. This counter generates the TMRx match interrupt flag which is latched in TMRxIF of the PIRx register.

<< TMR2_INT | 14-bit sources | TMR6_INT >>

Page last modified on March 16, 2018, at 11:03 PM