Can't get IOC on pin change working
Can't get IOC on pin change working
Code:
#CONFIG
__config _CONFIG1, _FEXTOSC_OFF & _RSTOSC_HFINT32 & _CLKOUTEN_OFF & _CSWEN_OFF & _FCMEN_ON
__config _CONFIG2, _MCLRE_ON & _PWRTE_OFF & _LPBOREN_OFF & _BOREN_ON & _BORV_LO & _ZCD_OFF & _PPS1WAY_OFF & _STVREN_ON & _DEBUG_OFF
__config _CONFIG3, _WDTCPS_WDTCPS_11 & _WDTE_ON & _WDTCWS_WDTCWS_7 & _WDTCCS_LFINTOSC
__config _CONFIG4, _WRT_OFF & _SCANE_available & _LVP_OFF
__config _CONFIG5, _CP_OFF & _CPD_OFF
#ENDCONFIG
DEFINE OSC 32
include "DT_INTS-14.bas"
include "ReEnterPBP.bas"
ASM
INT_LIST macro ;IntSource, Label, Type, ResetFlag?
INT_Handler IOC_INT, _IOCinterrupts, PBP, yes
endm
INT_CREATE ;Creates the interrupt processor
ENDASM
INTCON = 000000
' bit 7 GIE Global Interrupt Enable bit
' 1 = Enables all active interrupts
' bit 6 PEIE Peripheral Interrupt Enable bit
' bit 5-1 Unimplemented: Read as ‘0’
' bit 0 INTEDG Interrupt Edge Select bit
PIE0 = 010000 ' PERIPHERAL INTERRUPT ENABLE REGISTER 0
' bit 7-6 Unimplemented: Read as ‘0’
' bit 5 TMR0IE: TMR0 Overflow Interrupt Enable bit
' bit 4 IOCIE: Interrupt-on-Change Interrupt Enable bit
' 1 = Enables the IOC change interrupt
' bit 3-1 Unimplemented: Read as ‘0’
' bit 0 INTE: INT External Interrupt Flag bit
IOCCP = 010000 ' INTERRUPT-ON-CHANGE PORTC POSITIVE EDGE REGISTER
' bit 7-0 IOCCP<7:0> Interrupt-on-Change PORTC Positive Edge Enable bits
' 1 = Interrupt-on-Change enabled on the pin
' for a positive-going edge. IOCCFx bit
' and IOCIF flag will be set upon detecting an edge.
IOCCN = 000000 ' INTERRUPT-ON-CHANGE PORTC NEGATIVE EDGE REGISTER
' bit 7-0 IOCCP<7:0> Interrupt-on-Change PORTC Negative Edge Enable bits
' 1 = Interrupt-on-Change enabled on the pin
' for a Negative-going edge. IOCCFx bit
' and IOCIF flag will be set upon detecting an edge.
ANSELA = 000000
ANSELB = 000000
ANSELC = 000000
ANSELD = 000000
ANSELE = 000000
TRISA = 000000
TRISB = 000000
TRISC = 010000
TRISD = 000000
TRISE = 000000
PushSwitch VAR PortC.4
InterruptLED VAR LatC.2
HeartbeatLED VAR LatC.3
ButtonWasPressed VAR byte
Pause 500 ' Let PIC and LCD stabilize
InterruptLED = 0
ButtonWasPressed = 0
IOCCF.4 = 0
@ INT_ENABLE IOC_INT
goto Mainloop
IOCinterrupts:
if IOCCF.4 = 1 then
ButtonWasPressed = 1 ' set a flag
IOCCF.4 = 0
endif
@ INT_RETURN
Mainloop:
if ButtonWasPressed = 1 then ' Check flag
InterruptLED = 1
endif
HeartbeatLED = 1
pause 500
HeartbeatLED = 0
pause 500
goto mainloop
end
InterruptLED never lights up when I press PushSwitch, and the HeartbeatLED seems to hang for 2-3 seconds when I press.
Re: Can't get IOC on pin change working
You appear to have forgotten the % for bit definitions
eg variable = %10100110
not variable = 10100110
Re: Can't get IOC on pin change working
congrats on posting your code in code tags
while its unfortunate that the forum mangles % notation i guess that mangled binary notation is not your trouble
you have neglected to tell us what pic chip you are using but looking at the config section it has PPS
therefore dt-ints will not in all likelihood function for your chip without modifications
secondly you have not set up the internal osc at all, that will cause a very slow default int osc to be used. depending on the pic chip you are using of course
Re: Can't get IOC on pin change working
Quote:
Originally Posted by
richard
congrats on posting your code in code tags
you have neglected to tell us what pic chip you are using but looking at the config section it has PPS
therefore dt-ints will not in all likelihood function for your chip without modifications
Richard,
can you elaborate or provide some pointers for that? You're suggesting there's more mods needed than to simply assign the appropriate PPSs ?
Troy
Re: Can't get IOC on pin change working
nobody keeps dt-ints upto date, the pic world has moved on - pic int flags and enable bits have been changed/modified added to and relocated for enhanced core chips pic16f 1xxxxx
see this
https://www.picbasic.co.uk/forum/sho...change-working
Re: Can't get IOC on pin change working
