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AN1320 Datasheet(PDF) 18 Page - STMicroelectronics |
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AN1320 Datasheet(HTML) 18 Page - STMicroelectronics |
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18 / 20 page  AN1320 APPLICATION NOTE 18/20 ;========================================================== ; Interrupt routines ;========================================================== ; *** Port A ; Unused IPA reti ; *** Port C ; Test if some signal went up IPC ld W,A ; save accumulator jrs 2,DRC,PC2 ; Test port C, pin 2 PC2End jrs 3,DRC,PC3 ; Test port C, pin 3 PC3End ld A,W ; restore accumulator reti PC2 ; PC2 issued nop nop jrr 2,DRC,PC2End ; Confirm steady on pin jp StopIt ; Stop operations PC3 nop nop jrr 3,DRC,PC3End ; Confirm steady on pin jp StopIt ; Stop operations ;========================================================== ; DispatchIRQ4: test if timer or AD interrupt ;========================================================== DispatchIRQ4 jrs 7,TSCR,ITIM ; Test for timer interrupt jrs 6,ADCR,IADC ; Test for AD interrupt reti ;========================================================== IADC res 7,ADCR ; Disable Interrupt ld a,ADR ; Load Sample ld Sample,a ld a,Count ; Test for maximum sample jrnz Conversion ; maximum reached reti Conversion ld a,Sample ; a = Sample rlc a ; a = a >> 4 rlc a rlc a rlc a andi a,07h ; 8 levels add a,Media ld Media,a dec Count ld a,Count jrz SetSamp set 5,ADCR ; Enable A/D converter nop |
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