Instant Interrupts - Revisited

[Darrel Taylor]

Alain,

Well, you may have noticed I didn't get the "GLOBAL" for INT_ENABLE/DISABLE put in the last version of DT_INTS-18.
It turns out that GLOBAL is a reserved word for MPASM. It's used with relocatable code.

I could have used GLBL or GLBAL I suppose, but somehow

@ INT_DISABLE GLBL

Seems even more cryptic than

GIE = 0

I still think it should be in there, as should PERIPHERAL, HIPRIORITY and LOWPRIORITY.

But I'm not sure what the best way is, AKA less confusing.

Any thoughts?
<br>

[Acetronics2]

Alain,

Well, you may have noticed I didn't get the "GLOBAL" for INT_ENABLE/DISABLE put in the last version of DT_INTS-18.
It turns out that GLOBAL is a reserved word for MPASM. It's used with relocatable code.

I could have used GLBL or GLBAL I suppose, but somehow

@ INT_DISABLE GLBL

Seems even more cryptic than

GIE = 0

I still think it should be in there, as should PERIPHERAL, HIPRIORITY and LOWPRIORITY.

But I'm not sure what the best way is, AKA less confusing.

Any thoughts?
<br>

Hi, Darrel

What about

@ G_INT_DISABLE and @ G_INT_ENABLE ??? ... would be simple enough. ... and it's just "ordinary" macros !!!

Remember the goal was only to use something simple to remind ( in other words: to use for datasheet non-lovers !!! )

To me, GIE = 0 is also the simpler ... But, as you've seen, nowadays nobody dares to read the datasheets !!!




The Tractor computer soft is just finished (!)... I had some precedence headaches ( particularly with // !!! ), and it was really difficult to see what was wrong ...

despite result was good for setting a flag, operation was wrong !!! ... and was no way to cancel that flag ...

Now, I must translate my comments to English ...

Regards
Alain

[srspinho]

Hello Darrel !

I´m using your Instat interrupts to work with TIMER1, TIMER2 and CCP1 with a 16F877 @ 4Mhz, like this :

ASM
;T0IF = TMR0IF
;T0IE = TMR0IE
INT_LIST macro ; IntSource, Label, Type, ResetFlag?
INT_Handler CCP1_INT, _Capture, PBP, yes
INT_Handler TMR1_INT, _Timer1, PBP, yes
INT_Handler TMR2_INT, _tick, PBP, yes
endm
INT_CREATE ; Cria a interrupção
ENDASM

Everything is working very, very well.

I´m doing a On-board computer for my small Opel Corsa, and this interrupts are just great !
Me and Sirvo (remember him ?) are doing almost the same on-board computer.

But now, I would like to implement 4 Buttons to my application (Start, Stop, Pause, Funcition Keys).

I´m trying to do that with the button statement without success / good results.

I read your sample (hello word for instant interrupts) but the INT_INT read just the RB0/INT right ?

Is that possible to use the Instant Interrupts to create/read, let´s say, 4 different buttons on PORTC ?

Tahank You very much !

bye


Sérgio Pinheiro

[Darrel Taylor]

Is that possible to use the Instant Interrupts to create/read, let´s say, 4 different buttons on PORTC ?

Yes, that's possible. But it would be a lot easier if you used RBC_INT "Port B change interrupts". It uses PORTB.4 thru PORTB.7

But if those pins aren't available, you could do something like this, which uses only 1 interrupt (INT_INT on Falling Edge), then the interrupt handler can read PORTC to figure out which one was pressed.


<br>

[srspinho]

Hi Darrel

Thank you very Much !

I think this could help me a Lot !

I´m already using some portb pins and this solution will help a lot !

Thank you again !

Sérgio

[duncan303]

Hi Darrel,

I have been using your wonderful instant interrupts routine, i have experienced a hiccup and cannot work out what I am doing wrong.

I wonder anybody may be able to help direct me to a solution.

I am using a 18F4520 with 2.5 and masm401. I have checked that I have your latest version which I beleive to be 3.2 (dated 28/8/07).

when I compile the following code:

define OSC 16
INCLUDE "DT_INTS-18.bas"
INCLUDE "ReEnterPBP-18.bas" ; Include if using PBP interrupts
ASM
INT_LIST macro ; IntSource, Label, Type, ResetFlag?
INT_Handler CMP1_INT, _HopOut, PBP, yes
endm
INT_CREATE ; Creates the interrupt processor
ENDASM

TRISA = %00111111'
TRISD = %00000000
Z var bit
x var byte
CMCON = %00000010
@ INT_ENABLE CMP1_INT
Start:
PORTD.4 = 0
z = 0
Waiting:
if z = 0 then waiting

for x = 1 to 20
pause 50
toggle PORTD.4
next x
goto start

HopOut:
z = 1
@ INT_RETURN

end


I recieve the following complie errors



Error[128]........: Missing argument(s)
Error[113]........: Symbol not previously defined(IntFlagReg)
Error[113]........: Symbol not previously defined(IntFlagBit)
Error[113]........: Symbol not previously defined(IntFlagReg)
Error[113]........: Symbol not previously defined(IntFlagBit)
Error[101]........: ERRORInterrupt Source(IntFlagReg,IntFlagBit)not found)
Error[128]........: Missing argument(s)
Error[101]........: ERRORINT_ENABLE -Interupt Source not Found!)


If I change the CMP1 to CMP2 I receive errors

If I change the CMP1 to CMP then it compiles okay.

Any thoughts... should I be looking to set the registers manually maybe? I was planning to use both comparators independantly.

Thanks

[Acetronics2]

Hi,

No surprise if you read the interrupt sources list

#define INT_INT INTCON,INT0IF ;-- INT External Interrupt, 16F compatible
#define INT0_INT INTCON,INT0IF ;-- INT0 External Interrupt
#define INT1_INT INTCON3,INT1IF ;-- INT1 External Interrupt
#define INT2_INT INTCON3,INT2IF ;-- INT2 External Interrupt
#define INT3_INT INTCON3,INT3IF ;-- INT3 External Interrupt
#define RBC_INT INTCON,RBIF ;-- RB Port Change Interrupt
#define TMR0_INT INTCON,TMR0IF ;-- TMR0 Overflow Interrupt 18F
#define TMR1_INT PIR1,TMR1IF ;-- TMR1 Overflow Interrupt
#define TMR2_INT PIR1,TMR2IF ;-- TMR2 to PR2 Match Interrupt
#define TMR3_INT PIR2,TMR3IF ;-- TMR3 Overflow Interrupt
#define TMR4_INT PIR3,TMR4IF ;-- TMR4 Overflow Interrupt
#define TX_INT PIR1,TXIF ;-- USART Transmit Interrupt
#define TX1_INT PIR1,TX1IF ;-- USART1 Transmit Interrupt
#define TX2_INT PIR3,TX2IF ;-- USART2 Transmit Interrupt
#define RX_INT PIR1,RCIF ;-- USART Receive Interrupt
#define RX1_INT PIR1,RC1IF ;-- USART1 Receive Interrupt
#define RX2_INT PIR3,RC2IF ;-- USART2 Receive Interrupt
#define CMP_INT PIR2,CMIF ;-- Comparator Interrupt
#define EE_INT PIR2,EEIF ;-- EEPROM/FLASH Write Operation Interrupt
#define BUS_INT PIR2,BCLIF ;-- Bus Collision Interrupt
#define LVD_INT PIR2,LVDIF ;-- Low Voltage Detect Interrupt
#define HLVD_INT PIR2,HLVDIF ;-- High/Low Voltage Detect Interrupt
#define PSP_INT PIR1, PSPIF ;-- Parallel Slave Port Read/Write Interrupt
#define AD_INT PIR1, ADIF ;-- A/D Converter Interrupt
#define SSP_INT PIR1, SSPIF ;-- Master Synchronous Serial Port Interrupt
#define CCP1_INT PIR1, CCP1IF ;-- CCP1 Interrupt
#define CCP2_INT PIR2, CCP2IF ;-- CCP2 Interrupt
#define CCP3_INT PIR3, CCP3IF ;-- CCP3 Interrupt
#define CCP4_INT PIR3, CCP4IF ;-- CCP4 Interrupt
#define CCP5_INT PIR3, CCP5IF ;-- CCP5 Interrupt
#define USB_INT PIR2, USBIF ;-- USB Interrupt
#define OSC_INT PIR2, OSCFIF ;-- Oscillator Fail Interrupt



... only this :

#define CMP_INT PIR2,CMIF ;-- Comparator Interrupt

I think you have Yourself to look from which comparator the interrupt comes ...

Alain