Elapsed timer not working as expected at 64MHz

[Demon]

I bet this is my Saleae probe biting me in the nose again; not being able to run it fast enough.

The interrupt is working faster, I'm probably missing signals.



EDIT: And I notice I didn't align the marker the same way on Probe 1 - Port = 1 / 0, but it's the same interval as described in the WIDTH; 0.250uS, I just rechecked.

asm
; __CONFIG    _CONFIG1H, _FOSC_INTIO67_1H & _PLLCFG_OFF_1H & _PRICLKEN_OFF_1H & _FCMEN_ON_1H & _IESO_OFF_1H
 __CONFIG    _CONFIG1H, _FOSC_INTIO67_1H & _PLLCFG_ON_1H & _PRICLKEN_OFF_1H & _FCMEN_ON_1H & _IESO_OFF_1H
 __CONFIG    _CONFIG2L, _PWRTEN_ON_2L & _BOREN_SBORDIS_2L & _BORV_285_2L
 __CONFIG    _CONFIG2H, _WDTEN_OFF_2H
 __CONFIG    _CONFIG3H, _CCP2MX_PORTC1_3H & _PBADEN_OFF_3H & _CCP3MX_PORTE0_3H & _HFOFST_OFF_3H & _T3CMX_PORTB5_3H & _P2BMX_PORTC0_3H & _MCLRE_EXTMCLR_3H
 __CONFIG    _CONFIG4L, _STVREN_OFF_4L & _LVP_OFF_4L & _XINST_OFF_4L & _DEBUG_OFF_4L
endasm

;DEFINE OSC 16
;OSCTUNE = %10000000

DEFINE OSC 64
OSCTUNE = %11000000

OSCCON  = %01110000
OSCCON2 = %00000100
INCLUDE "DT_INTS-18.bas"
INCLUDE "ReEnterPBP-18.bas"
INCLUDE "ReEnterPBP-18LP.bas"
INCLUDE "Elapsed_INT-18.bas"
ASM
INT_LIST  macro    ; IntSource,        Label,           Type,   ResetFlag?
;        INT_Handler    RX1_INT,    _RX1Interrupt,    PBP,    yes
    endm
    INT_CREATE                  ; Creates the interrupt processor
INT_LIST_L  macro  ; IntSource,        Label,           Type,   ResetFlag?
        INT_Handler   TMR1_INT,   _ClockCount,   PBP,  yes
    endm
    INT_CREATE_L                ; Creates the Low Priority interrupt processor
ENDASM
ANSELA = %00000000
ANSELB = %00000000
ANSELC = %00000000
ANSELD = %00000000
ANSELE = %00000000
ADCON0 = %00000000
PMD0 = %10111110
PMD1 = %11011111
PMD2 = %00001111
DEFINE USE_LOWPRIORITY 1
TRISA = %00000000
TRISB = %00000000
TRISC = %00000000
TRISD = %00000000
TRISE = %00000000
PORTA = %00000000
PORTB = %00000000
PORTC = %00000000
PORTD = %00000000
PORTE = %00000000
    pause 100
@ INT_ENABLE  TMR1_INT                  ; enable Timer 1 interrupts
    GOSUB ResetTime                     ' Reset Time to  0d-00:00:00.00
MainProgram:

    PortD.2 = 1

    if T1CON.0 = 0 then
        GOSUB StartTimer                    ' Start the Elapsed Timer
        PortD.3 = 1
    endif

    PortD.2 = 0

    if ticks = 25 then
        PortD.3 = 0
        GOSUB StopTimer                    ' Stop the Elapsed Timer
        GOSUB ResetTime                     ' Reset Time to  0d-00:00:00.00
    endif

    goto MainProgram
end

Switch bouncing becomes much more pronounced at 64MHz. I think I'm going to change approach and go the long way and use just a 0.1uF ceramic cap on each pin (I remember that helped somewhat on previous tests).

Master PIC @ 64MHz
LED Slave PIC @ 64MHz
Keypad Slave PIC at 16MHz

I start DT Timer on a keypress and ignore inputs during that interval. I just have to make tests to see how fast I can press the same button and tweak the delay.

I wanted to handle both the LEDs and Keypad on the same PIC, but it'll be a lot easier and reliable to just split them up.