16f1826 timer problem solution

[Chris]

not sure where this should go, but i couldnt use the timer on my 16f1826 enhanced pic micro. the culprit was in the timer.h file, the 16f1826 has TMR1CS0 and TMR1CS1 because of the capacitive sensors being able to be used as timer inputs (or something like that) im working on modifying the code to work with this chip and will post the updated code on here for anyone interested. this code im going to post shouldnt change function of normal chips but adds the changes needed for TMR1CS0 and TMR1CS1 (i also remembered i added TMR0CS in place of T0SE for timer0, im going to check over and test any other timers on this chip before posting the code, maybe the developer would like to put this code in the updates?

[Chris]

This code compiled properly but I havent tested it yet on the actual chip, but here it is anyway

'    Timer control routines for Great Cow BASIC
'    Copyright (C) 2006-2009 Hugh Considine
'    This library is free software; you can redistribute it and/or
'    modify it under the terms of the GNU Lesser General Public
'    License as published by the Free Software Foundation; either
'    version 2.1 of the License, or (at your option) any later version.
'    This library is distributed in the hope that it will be useful,
'    but WITHOUT ANY WARRANTY; without even the implied warranty of
'    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
'    Lesser General Public License for more details.
'    You should have received a copy of the GNU Lesser General Public
'    License along with this library; if not, write to the Free Software
'    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
'********************************************************************************
'IMPORTANT:
'THIS FILE IS ESSENTIAL FOR SOME OF THE COMMANDS IN GCBASIC. DO NOT ALTER THIS FILE
'UNLESS YOU KNOW WHAT YOU ARE DOING. CHANGING THIS FILE COULD RENDER SOME GCBASIC
'COMMANDS UNUSABLE!
'********************************************************************************
'Changes:
' 10/7/2009: Added AVR support
' 04/11/2012: Added support for 16f1826 by bowlofpudding
'Subroutines:
' InitTimer0 (Source, Prescaler)
' InitTimer1 (Source, Prescaler)
' InitTimer2 (Prescaler, Postscaler)
' InitTimer3 (Source, Prescaler)
' ClearTimer(TimerNumber)
' StartTimer(TimerNumber)
' StopTimer(TimerNumber)
'Some simpler names for the timers (use to read)
#ifdef PIC
    '#define Timer0 TMR0
    Dim Timer0 Alias TMR0
    '#define Timer1 TMR1L
    'Is now a function, need to ensure read happens in certain order
    '#define Timer2 TMR2
    Dim Timer2 Alias TMR2
#endif
#ifdef AVR
    Dim Timer0 Alias TCNT0
    Dim Timer2 Alias TCNT2
#endif
'Sources
#define Osc 1
#define Ext 2
#define ExtOsc 3
'AVR prescaler settings
#define PS_1 1
#define PS_8 2
#define PS_64 3
#define PS_256 4
#define PS_1024 5
'Also worth noting here,
'0: stop timer
'6: external, clock on falling
'7: external, clock on rising
#define AVR_EXT_TMR 7
'Timer 0 prescales
#define PS0_1/2 0
#define PS0_1/4 1
#define PS0_1/8 2
#define PS0_1/16 3
#define PS0_1/32 4
#define PS0_1/64 5
#define PS0_1/128 6
#define PS0_1/256 7
#define PS0_2 0
#define PS0_4 1
#define PS0_8 2
#define PS0_16 3
#define PS0_32 4
#define PS0_64 5
#define PS0_128 6
#define PS0_256 7
'Timer 1 prescales
#define PS1_1/1 0
#define PS1_1/2 16
#define PS1_1/4 32
#define PS1_1/8 48
#define PS1_1 0
#define PS1_2 16
#define PS1_4 32
#define PS1_8 48
'Timer 2 prescales
#define PS2_1/1 0
#define PS2_1/4 1
#define PS2_1/16 2
#define PS2_1 0
#define PS2_4 1
#define PS2_16 2
'Timer 3 prescales
#define PS3_1/1 0
#define PS3_1/2 16
#define PS3_1/4 32
#define PS3_1/8 48
#define PS3_1 0
#define PS3_2 16
#define PS3_4 32
#define PS3_8 48
Function Timer1 As Word
    #ifdef PIC
        [byte]Timer1 = TMR1L
        Timer1_H = TMR1H
    #endif
    #ifdef AVR
        [byte]Timer1 = TCNT1L
        Timer1_H = TCNT1H
    #endif
End Function
Function Timer3 As Word
    #ifdef PIC
        [byte]Timer3 = TMR3L
        Timer3_H = TMR3H
    #endif
    #ifdef AVR
        [byte]Timer3 = TCNT3L
        Timer3_H = TCNT3H
    #endif
End Function
Function Timer4 As Word
    #ifdef AVR
        [byte]Timer4 = TCNT4L
        Timer4_H = TCNT4H
    #endif
End Function
Function Timer5 As Word
    #ifdef AVR
        [byte]Timer5 = TCNT5L
        Timer5_H = TCNT5H
    #endif
End Function
'Start/Clear/Stop subs
Sub StartTimer(In TMRNumber)
    #ifdef PIC
        'Timer 0 always runs
        #ifdef Var(T1CON)
            If TMRNumber = 1 Then
                Set TMR1ON On
            End If
        #endif
        #ifdef Var(T2CON)
            If TMRNumber = 2 Then
                T2CON = TMR2Pres
                Set TMR2ON On
            End If
        #endif
        #ifdef Var(T3CON)
            If TMRNumber = 3 Then
                Set TMR3ON On
            End If
        #endif
    #endif

    #ifdef AVR
        'Need to set clock select bits to 0
        #ifndef Var(TCCR0B)
            #ifdef Var(TCCR0)
            If TMRNumber = 0 Then
                TCCR0 = TMR0Pres
            End If
            #endif
        #endif
        #ifdef Var(TCCR0B)
            If TMRNumber = 0 Then
                TCCR0B = TCCR0B And 248 Or TMR0Pres
            End If
        #endif
        #ifdef Var(TCCR1B)
            If TMRNumber = 1 Then
                TCCR1B = TCCR1B And 248 Or TMR1Pres
            End If
        #endif
        #ifdef Var(TCCR2B)
            If TMRNumber = 2 Then
                TCCR2B = TCCR2B And 248 Or TMR2Post
            End If
        #endif
        #ifdef Var(TCCR3B)
            If TMRNumber = 3 Then
                TCCR3B = TCCR3B And 248 Or TMR3Pres
            End If
        #endif
        #ifdef Var(TCCR4B)
            If TMRNumber = 4 Then
                TCCR4B = TCCR4B And 248 Or TMR4Pres
            End If
        #endif
        #ifdef Var(TCCR5B)
            If TMRNumber = 5 Then
                TCCR5B = TCCR5B And 248 Or TMR5Pres
            End If
        #endif
    #endif
End Sub
Sub ClearTimer (In TMRNumber)
    #ifdef PIC
        If TMRNumber = 0 Then
            TMR0 = 0
            SInitTimer0
        End If
        #ifdef Var(T1CON)
            If TMRNumber = 1 then
                TMR1H = 0
                TMR1L = 0
                SInitTimer1
            End If
        #endif
        #ifdef Var(T2CON)
            If TMRNumber = 2 Then
                TMR2Pres = T2CON
                TMR2 = 0
                T2CON = TMR2Pres
            End If
        #endif
        #ifdef Var(T3CON)
            If TMRNumber = 3 then
                TMR3H = 0
                TMR3L = 0
                SInitTimer3
            End If
        #endif
    #endif
    #ifdef AVR
        #ifdef Var(TCNT0)
            If TMRNumber = 0 Then
                TCNT0 = 0
            End If
        #endif
        #ifdef Var(TCNT1L)
            If TMRNumber = 1 Then
                TCNT1H = 0
                TCNT1L = 0
            End If
        #endif
        #ifdef Var(TCNT2)
            If TMRNumber = 2 Then
                TCNT2 = 0
            End If
        #endif
        #ifdef Var(TCNT3L)
            If TMRNumber = 3 Then
                TCNT3H = 0
                TCNT3L = 0
            End If
        #endif
        #ifdef Var(TCNT4L)
            If TMRNumber = 4 Then
                TCNT4H = 0
                TCNT4L = 0
            End If
        #endif
        #ifdef Var(TCNT5L)
            If TMRNumber = 5 Then
                TCNT5H = 0
                TCNT5L = 0
            End If
        #endif
    #endif
End Sub
Sub StopTimer (In TMRNumber)
    #ifdef PIC
        'Timer 0 always runs
        If TMRNumber = 1 Then
            Set TMR1ON OFF
        End If
        #ifdef Var(T2CON)
            If TMRNumber = 2 Then
                Set TMR2ON OFF
            End If
        #endif
        #ifdef Var(T3CON)
            If TMRNumber = 3 Then
                Set TMR3ON OFF
            End If
        #endif
    #endif
    #ifdef AVR
        'Need to set clock select bits to 0
        #ifdef Var(TCCR0B)
            If TMRNumber = 0 Then
                TCCR0B = TCCR0B And 248
            End If
        #endif
        #ifdef Var(TCCR1B)
            If TMRNumber = 1 Then
                TCCR1B = TCCR1B And 248
            End If
        #endif
        #ifdef Var(TCCR2B)
            If TMRNumber = 2 Then
                TCCR2B = TCCR2B And 248
            End If
        #endif
        #ifdef Var(TCCR3B)
            If TMRNumber = 3 Then
                TCCR3B = TCCR3B And 248
            End If
        #endif
        #ifdef Var(TCCR4B)
            If TMRNumber = 4 Then
                TCCR4B = TCCR4B And 248
            End If
        #endif
        #ifdef Var(TCCR5B)
            If TMRNumber = 5 Then
                TCCR5B = TCCR5B And 248
            End If
        #endif
    #endif
End Sub
'Initialise subs for individual timers
Sub InitTimer0(In TMR0Source, In TMR0Pres)
    #ifdef PIC
        SInitTimer0
    #endif
    #ifdef AVR
        'Just need to buffer TMR0Pres
        '(And change it for external clock)
        If TMR0Source = Ext Then
            TMR0Pres = AVR_EXT_TMR
        End If
    #endif
End Sub
Sub SInitTimer0
    OPTION_REG = OPTION_REG AND 192
    SET OPTION_REG.PSA OFF
'to fix for 16f1826
#ifdef T0SE
    if TMR0Source = Osc THEN SET OPTION_REG.T0SE OFF
    if TMR0Source = Ext THEN SET OPTION_REG.T0SE ON
#endif
#ifndef T0SE
    if TMR0Source = Osc THEN SET OPTION_REG.TMR0CS OFF
    if TMR0Source = Ext THEN SET OPTION_REG.TMR0CS ON
#endif
    clrwdt
    OPTION_REG = OPTION_REG OR TMR0Pres
End Sub
Sub InitTimer1(In TMR1Source, In TMR1Pres)
    #ifdef PIC
        SInitTimer1
    #endif
    #ifdef AVR
        If TMR1Source = Ext Then
            TMR1Pres = AVR_EXT_TMR
        End If
    #endif
End Sub
Sub SInitTimer1
    T1CON = TMR1Pres
'added for 16f1826
        If TMR1Source = Ext Then
            #ifdef TMR1CS
                Set TMR1CS On
            #endif
    'added for 16f1826
            #ifndef TMR1CS
                Set TMR1CS1 On
            #endif
        End If
        If TMR1Source = ExtOsc Then
            #ifdef TMR1CS
                Set TMR1CS On
            #endif
    'added for 16f1826
            #ifndef TMR1CS
                Set TMR1CS1 On
            #endif
            Set T1OSCEN On
        End If
    #endif
End Sub
Sub InitTimer2 (In TMR2Pres, In TMR2Post)
    #ifdef PIC
        swapf TMR2Post,F
        rrf TMR2Post,W
        andlw 120
        iorwf TMR2Pres,F
    #endif
    #ifdef AVR
        'Some wacky swapping of variable names here
        If TMR2Pres = Ext Then
            TMR2Post = AVR_EXT_TMR
        End If
    #endif
End Sub
Sub InitTimer3(In TMR3Source, In TMR3Pres)
    #ifdef PIC
        SInitTimer3
    #endif
    #ifdef AVR
        If TMR3Source = Ext Then
            TMR3Pres = AVR_EXT_TMR
        End If
    #endif
End Sub
Sub SInitTimer3
    T3CON = TMR3Pres
    If TMR3Source = Ext Then
        Set TMR3CS On
    End If
    If TMR3Source = ExtOsc Then
        Set TMR3CS On
    End If
End Sub
Sub InitTimer4(In TMR4Source, In TMR4Pres)
    #ifdef AVR
        If TMR4Source = Ext Then
            TMR4Pres = AVR_EXT_TMR
        End If
    #endif
End Sub
Sub InitTimer5(In TMR5Source, In TMR5Pres)
    #ifdef AVR
        If TMR5Source = Ext Then
            TMR5Pres = AVR_EXT_TMR
        End If
    #endif
End Sub

[Chris]

I tested the code I modified with a non 16f1826 chip and the way I had the "#ifndef" in there made the compile fail. I've made the required changes and it should now work with the 16f1826, and with any other chip is used to work with. I'm a beginner at C code and really really beginner at understanding ASM codes, I just used my common sense to figure these problems out.

'    Timer control routines for Great Cow BASIC
'    Copyright (C) 2006-2009 Hugh Considine
'    This library is free software; you can redistribute it and/or
'    modify it under the terms of the GNU Lesser General Public
'    License as published by the Free Software Foundation; either
'    version 2.1 of the License, or (at your option) any later version.
'    This library is distributed in the hope that it will be useful,
'    but WITHOUT ANY WARRANTY; without even the implied warranty of
'    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
'    Lesser General Public License for more details.
'    You should have received a copy of the GNU Lesser General Public
'    License along with this library; if not, write to the Free Software
'    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
'********************************************************************************
'IMPORTANT:
'THIS FILE IS ESSENTIAL FOR SOME OF THE COMMANDS IN GCBASIC. DO NOT ALTER THIS FILE
'UNLESS YOU KNOW WHAT YOU ARE DOING. CHANGING THIS FILE COULD RENDER SOME GCBASIC
'COMMANDS UNUSABLE!
'********************************************************************************
'Changes:
' 10/7/2009: Added AVR support
' 04/11/2012: Added support for 16f1826 by bowlofpudding
'Subroutines:
' InitTimer0 (Source, Prescaler)
' InitTimer1 (Source, Prescaler)
' InitTimer2 (Prescaler, Postscaler)
' InitTimer3 (Source, Prescaler)
' ClearTimer(TimerNumber)
' StartTimer(TimerNumber)
' StopTimer(TimerNumber)
'Some simpler names for the timers (use to read)
#ifdef PIC
    '#define Timer0 TMR0
    Dim Timer0 Alias TMR0
    '#define Timer1 TMR1L
    'Is now a function, need to ensure read happens in certain order
    '#define Timer2 TMR2
    Dim Timer2 Alias TMR2
#endif
#ifdef AVR
    Dim Timer0 Alias TCNT0
    Dim Timer2 Alias TCNT2
#endif
'Sources
#define Osc 1
#define Ext 2
#define ExtOsc 3
'AVR prescaler settings
#define PS_1 1
#define PS_8 2
#define PS_64 3
#define PS_256 4
#define PS_1024 5
'Also worth noting here,
'0: stop timer
'6: external, clock on falling
'7: external, clock on rising
#define AVR_EXT_TMR 7
'Timer 0 prescales
#define PS0_1/2 0
#define PS0_1/4 1
#define PS0_1/8 2
#define PS0_1/16 3
#define PS0_1/32 4
#define PS0_1/64 5
#define PS0_1/128 6
#define PS0_1/256 7
#define PS0_2 0
#define PS0_4 1
#define PS0_8 2
#define PS0_16 3
#define PS0_32 4
#define PS0_64 5
#define PS0_128 6
#define PS0_256 7
'Timer 1 prescales
#define PS1_1/1 0
#define PS1_1/2 16
#define PS1_1/4 32
#define PS1_1/8 48
#define PS1_1 0
#define PS1_2 16
#define PS1_4 32
#define PS1_8 48
'Timer 2 prescales
#define PS2_1/1 0
#define PS2_1/4 1
#define PS2_1/16 2
#define PS2_1 0
#define PS2_4 1
#define PS2_16 2
'Timer 3 prescales
#define PS3_1/1 0
#define PS3_1/2 16
#define PS3_1/4 32
#define PS3_1/8 48
#define PS3_1 0
#define PS3_2 16
#define PS3_4 32
#define PS3_8 48
Function Timer1 As Word
    #ifdef PIC
        [byte]Timer1 = TMR1L
        Timer1_H = TMR1H
    #endif
    #ifdef AVR
        [byte]Timer1 = TCNT1L
        Timer1_H = TCNT1H
    #endif
End Function
Function Timer3 As Word
    #ifdef PIC
        [byte]Timer3 = TMR3L
        Timer3_H = TMR3H
    #endif
    #ifdef AVR
        [byte]Timer3 = TCNT3L
        Timer3_H = TCNT3H
    #endif
End Function
Function Timer4 As Word
    #ifdef AVR
        [byte]Timer4 = TCNT4L
        Timer4_H = TCNT4H
    #endif
End Function
Function Timer5 As Word
    #ifdef AVR
        [byte]Timer5 = TCNT5L
        Timer5_H = TCNT5H
    #endif
End Function
'Start/Clear/Stop subs
Sub StartTimer(In TMRNumber)
    #ifdef PIC
        'Timer 0 always runs
        #ifdef Var(T1CON)
            If TMRNumber = 1 Then
                Set TMR1ON On
            End If
        #endif
        #ifdef Var(T2CON)
            If TMRNumber = 2 Then
                T2CON = TMR2Pres
                Set TMR2ON On
            End If
        #endif
        #ifdef Var(T3CON)
            If TMRNumber = 3 Then
                Set TMR3ON On
            End If
        #endif
    #endif

    #ifdef AVR
        'Need to set clock select bits to 0
        #ifndef Var(TCCR0B)
            #ifdef Var(TCCR0)
            If TMRNumber = 0 Then
                TCCR0 = TMR0Pres
            End If
            #endif
        #endif
        #ifdef Var(TCCR0B)
            If TMRNumber = 0 Then
                TCCR0B = TCCR0B And 248 Or TMR0Pres
            End If
        #endif
        #ifdef Var(TCCR1B)
            If TMRNumber = 1 Then
                TCCR1B = TCCR1B And 248 Or TMR1Pres
            End If
        #endif
        #ifdef Var(TCCR2B)
            If TMRNumber = 2 Then
                TCCR2B = TCCR2B And 248 Or TMR2Post
            End If
        #endif
        #ifdef Var(TCCR3B)
            If TMRNumber = 3 Then
                TCCR3B = TCCR3B And 248 Or TMR3Pres
            End If
        #endif
        #ifdef Var(TCCR4B)
            If TMRNumber = 4 Then
                TCCR4B = TCCR4B And 248 Or TMR4Pres
            End If
        #endif
        #ifdef Var(TCCR5B)
            If TMRNumber = 5 Then
                TCCR5B = TCCR5B And 248 Or TMR5Pres
            End If
        #endif
    #endif
End Sub
Sub ClearTimer (In TMRNumber)
    #ifdef PIC
        If TMRNumber = 0 Then
            TMR0 = 0
            SInitTimer0
        End If
        #ifdef Var(T1CON)
            If TMRNumber = 1 then
                TMR1H = 0
                TMR1L = 0
                SInitTimer1
            End If
        #endif
        #ifdef Var(T2CON)
            If TMRNumber = 2 Then
                TMR2Pres = T2CON
                TMR2 = 0
                T2CON = TMR2Pres
            End If
        #endif
        #ifdef Var(T3CON)
            If TMRNumber = 3 then
                TMR3H = 0
                TMR3L = 0
                SInitTimer3
            End If
        #endif
    #endif
    #ifdef AVR
        #ifdef Var(TCNT0)
            If TMRNumber = 0 Then
                TCNT0 = 0
            End If
        #endif
        #ifdef Var(TCNT1L)
            If TMRNumber = 1 Then
                TCNT1H = 0
                TCNT1L = 0
            End If
        #endif
        #ifdef Var(TCNT2)
            If TMRNumber = 2 Then
                TCNT2 = 0
            End If
        #endif
        #ifdef Var(TCNT3L)
            If TMRNumber = 3 Then
                TCNT3H = 0
                TCNT3L = 0
            End If
        #endif
        #ifdef Var(TCNT4L)
            If TMRNumber = 4 Then
                TCNT4H = 0
                TCNT4L = 0
            End If
        #endif
        #ifdef Var(TCNT5L)
            If TMRNumber = 5 Then
                TCNT5H = 0
                TCNT5L = 0
            End If
        #endif
    #endif
End Sub
Sub StopTimer (In TMRNumber)
    #ifdef PIC
        'Timer 0 always runs
        If TMRNumber = 1 Then
            Set TMR1ON OFF
        End If
        #ifdef Var(T2CON)
            If TMRNumber = 2 Then
                Set TMR2ON OFF
            End If
        #endif
        #ifdef Var(T3CON)
            If TMRNumber = 3 Then
                Set TMR3ON OFF
            End If
        #endif
    #endif
    #ifdef AVR
        'Need to set clock select bits to 0
        #ifdef Var(TCCR0B)
            If TMRNumber = 0 Then
                TCCR0B = TCCR0B And 248
            End If
        #endif
        #ifdef Var(TCCR1B)
            If TMRNumber = 1 Then
                TCCR1B = TCCR1B And 248
            End If
        #endif
        #ifdef Var(TCCR2B)
            If TMRNumber = 2 Then
                TCCR2B = TCCR2B And 248
            End If
        #endif
        #ifdef Var(TCCR3B)
            If TMRNumber = 3 Then
                TCCR3B = TCCR3B And 248
            End If
        #endif
        #ifdef Var(TCCR4B)
            If TMRNumber = 4 Then
                TCCR4B = TCCR4B And 248
            End If
        #endif
        #ifdef Var(TCCR5B)
            If TMRNumber = 5 Then
                TCCR5B = TCCR5B And 248
            End If
        #endif
    #endif
End Sub
'Initialise subs for individual timers
Sub InitTimer0(In TMR0Source, In TMR0Pres)
    #ifdef PIC
        SInitTimer0
    #endif
    #ifdef AVR
        'Just need to buffer TMR0Pres
        '(And change it for external clock)
        If TMR0Source = Ext Then
            TMR0Pres = AVR_EXT_TMR
        End If
    #endif
End Sub
Sub SInitTimer0
    OPTION_REG = OPTION_REG AND 192
    SET OPTION_REG.PSA OFF
'to fix for 16f1826
#ifdef T0SE
    if TMR0Source = Osc THEN SET OPTION_REG.T0SE OFF
    if TMR0Source = Ext THEN SET OPTION_REG.T0SE ON
#endif
#ifdef TMR0CS                                               'added for 16f1826
    if TMR0Source = Osc THEN SET OPTION_REG.TMR0CS OFF
    if TMR0Source = Ext THEN SET OPTION_REG.TMR0CS ON
#endif
    clrwdt
    OPTION_REG = OPTION_REG OR TMR0Pres
End Sub
Sub InitTimer1(In TMR1Source, In TMR1Pres)
    #ifdef PIC
        SInitTimer1
    #endif
    #ifdef AVR
        If TMR1Source = Ext Then
            TMR1Pres = AVR_EXT_TMR
        End If
    #endif
End Sub
Sub SInitTimer1
    T1CON = TMR1Pres
        If TMR1Source = Ext Then        'added for 16f1826
            #ifdef TMR1CS
                Set TMR1CS On
            #endif
            #ifdef TMR1CS1
                Set TMR1CS1 On
            #endif
        End If
        If TMR1Source = ExtOsc Then
            #ifdef TMR1CS               'added for 16f1826
                Set TMR1CS On
            #endif
    'added for 16f1826
            #ifdef TMR1CS1
                Set TMR1CS1 On
            #endif
            Set T1OSCEN On
        End If
End Sub
Sub InitTimer2 (In TMR2Pres, In TMR2Post)
    #ifdef PIC
        swapf TMR2Post,F
        rrf TMR2Post,W
        andlw 120
        iorwf TMR2Pres,F
    #endif
    #ifdef AVR
        'Some wacky swapping of variable names here
        If TMR2Pres = Ext Then
            TMR2Post = AVR_EXT_TMR
        End If
    #endif
End Sub
Sub InitTimer3(In TMR3Source, In TMR3Pres)
    #ifdef PIC
        SInitTimer3
    #endif
    #ifdef AVR
        If TMR3Source = Ext Then
            TMR3Pres = AVR_EXT_TMR
        End If
    #endif
End Sub
Sub SInitTimer3
    T3CON = TMR3Pres
    If TMR3Source = Ext Then
        Set TMR3CS On
    End If
    If TMR3Source = ExtOsc Then
        Set TMR3CS On
    End If
End Sub
Sub InitTimer4(In TMR4Source, In TMR4Pres)
    #ifdef AVR
        If TMR4Source = Ext Then
            TMR4Pres = AVR_EXT_TMR
        End If
    #endif
End Sub
Sub InitTimer5(In TMR5Source, In TMR5Pres)
    #ifdef AVR
        If TMR5Source = Ext Then
            TMR5Pres = AVR_EXT_TMR
        End If
    #endif
End Sub

[Hugh Considine]

I'll be happy to add those changes, thanks!

[Chris]

just to add on a little more support for the 16f1825 someone sent me a working eeprom routine for this chip, because the one included with gcbasic didnt work for my chip. I have tested this as working with my chip, but i dont know if it breaks support for the more standard chips.

'    EEPROM routines for Great Cow BASIC
'    Copyright (C) 2006-2007 Hugh Considine
'    This library is free software; you can redistribute it and/or
'    modify it under the terms of the GNU Lesser General Public
'    License as published by the Free Software Foundation; either
'    version 2.1 of the License, or (at your option) any later version.
'    This library is distributed in the hope that it will be useful,
'    but WITHOUT ANY WARRANTY; without even the implied warranty of
'    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
'    Lesser General Public License for more details.
'    You should have received a copy of the GNU Lesser General Public
'    License along with this library; if not, write to the Free Software
'    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
'********************************************************************************
'IMPORTANT:
'THIS FILE IS ESSENTIAL FOR SOME OF THE COMMANDS IN GCBASIC. DO NOT ALTER THIS FILE
'UNLESS YOU KNOW WHAT YOU ARE DOING. CHANGING THIS FILE COULD RENDER SOME GCBASIC
'COMMANDS UNUSABLE!
'********************************************************************************
'Updates:
' 3/5/2006: Program EEPROM read/write added
' 16/5/2006: Write mode disabled at end of EPWrite
' 23/5/2006: EPWrite and EPRead changed to stop use of temporary vars
' 19/8/2006: Program EEPROM altered to take input as word
' 9/2/2007: Bug fix: EEPGD bit not set if not present
' 5/8/2007: Altered to use alias to access address, data vars
' 4/9/2007: Data EEPROM code altered to support AVR
' 15/10/2007: Bug fix: FREE bit not set if not present, altered to use IntOn/IntOff to control interrupt
' 4/12/2007: Added In/Out to parameters
' 17/6/2008: Altered to make EPRead a system sub, to allow use in ReadTable
' 19/4/2009: Bugfixes for AVR, allow EEPE instead of EEWE
sub EPWrite(In EEAddress, In EEDataValue)
#IFDEF PIC
    'Variable alias
    #IFNDEF Var(EEADRH)
        Dim EEAddress Alias EEADR
    #ENDIF
    #IFDEF Var(EEADRH)
        Dim EEAddress As Word Alias EEADRH, EEADR
    #ENDIF
    #IFDEF Var(EEDATA)
        Dim EEDataValue Alias EEDATA
    #ENDIF
    #IFDEF Var(EEDATL)
        Dim EEDataValue Alias EEDATL
    #ENDIF

    'Disable interrupt
    IntOff

    'Select data memory
    #IFDEF Bit(EEPGD)
        SET EECON1.EEPGD OFF
    #ENDIF
    #IFDEF Bit(CFGS)
        Set EECON1.CFGS OFF
    #ENDIF

    'Start write
    SET EECON1.WREN ON
    EECON2 = 0x55
    EECON2 = 0xAA
    SET EECON1.WR ON
    SET EECON1.WREN OFF

    'Wait for write to complete
    WAIT WHILE EECON1.WR ON
    SET EECON1.WREN OFF

    'Restore interrupt
    IntOn

#ENDIF
#IFDEF AVR
    'Variable alias
    #IFDEF Var(EEARH)
        Dim EEAddress As Word Alias EEARH, EEARL
    #ENDIF
    #IFNDEF Var(EEARH)
        #IFDEF Var(EEAR)
            Dim EEAddress Alias EEAR
        #ENDIF
    #ENDIF
    Dim EEDataValue Alias EEDR

    'Enable write
    #IFDEF Bit(EEMWE)
        Set EECR.EEMWE On
    #ENDIF
    #IFNDEF Bit(EEMWE)
        #IFDEF Bit(EEMPE)
            Set EECR.EEMPE On
        #ENDIF
    #ENDIF
    'Start write, wait for it to complete
    #IFDEF Bit(EEWE)
        Set EECR.EEWE On
        Wait Until EECR.EEWE Off
    #ENDIF
    #IFNDEF Bit(EEWE)
        #IFDEF Bit(EEPE)
            Set EECR.EEPE On
            Wait Until EECR.EEPE Off
        #ENDIF
    #ENDIF

#ENDIF

end sub
'EPRead made into system subroutine
'Constant added to allow it to still be referred to as EPRead
#define EPRead SysEPRead
sub SysEPRead(In EEAddress, Out EEDataValue)

#IFDEF PIC
    'Variable alias
    #IFNDEF Var(EEADRH)
        Dim EEAddress Alias EEADR
    #ENDIF
    #IFDEF Var(EEADRH)
        Dim EEAddress As Word Alias EEADRH, EEADR
    #ENDIF
    #IFDEF Var(EEDATA)
        Dim EEDataValue Alias EEDATA
    #ENDIF
    #IFDEF Var(EEDATL)
        Dim EEDataValue Alias EEDATL
    #ENDIF

    'Disable interrupt
    IntOff

    'Select data memory
    #IFDEF Bit(EEPGD)
        SET EECON1.EEPGD OFF
    #ENDIF
    #IFDEF Bit(CFGS)
        Set EECON1.CFGS OFF
    #ENDIF

    'Read
    SET EECON1.RD ON

    'Restore interrupt
    IntOn
#ENDIF
#IFDEF AVR
    'Variable alias
    #IFDEF Var(EEARH)
        Dim EEAddress As Word Alias EEARH, EEARL
    #ENDIF
    #IFNDEF Var(EEARH)
        #IFDEF Var(EEAR)
            Dim EEAddress Alias EEAR
        #ENDIF
    #ENDIF
    Dim EEDataValue Alias EEDR

    'Start read
    Set EECR.EERE On

#ENDIF  
end sub
function ReadEP(EEAddress)
#IFDEF PIC
    'Variable alias
    #IFNDEF Var(EEADRH)
        Dim EEAddress Alias EEADR
    #ENDIF
    #IFDEF Var(EEADRH)
        Dim EEAddress As Word Alias EEADRH, EEADR
    #ENDIF
    #IFDEF Var(EEDATA)
        Dim EEDataValue Alias EEDATA
    #ENDIF
    #IFDEF Var(EEDATL)
        Dim EEDataValue Alias EEDATL
    #ENDIF

    'Disable interrupt
    IntOff

    'Select data memory
    #IFDEF Bit(EEPGD)
        SET EECON1.EEPGD OFF
    #ENDIF
    #IFDEF Bit(CFGS)
        Set EECON1.CFGS OFF
    #ENDIF

    'Read
    SET EECON1.RD ON
    ReadEP = EEDataValue

    'Restore interrupt
    IntOn
#ENDIF
#IFDEF AVR
    'Variable alias
    #IFDEF Var(EEARH)
        Dim EEAddress As Word Alias EEARH, EEARL
    #ENDIF
    #IFNDEF Var(EEARH)
        #IFDEF Var(EEAR)
            Dim EEAddress Alias EEAR
        #ENDIF
    #ENDIF
    Dim EEDataValue Alias EEDR

    'Start read
    Set EECR.EERE On
#ENDIF

end function
sub ProgramWrite(In EEAddress, In EEDataWord)
#IFDEF PIC
    Dim EEAddress As Word Alias EEADRH, EEADR
    #IFDEF Var(EEDATA)
        Dim EEDataWord As Word Alias EEDATH, EEDATA
    #ENDIF
    #IFDEF Var(EEDATL)
        Dim EEDataWord As Word Alias EEDATH, EEDATL
    #ENDIF

    'Disable Interrupt
    IntOff

    'Select program memory
    SET EECON1.EEPGD ON
    #IFDEF Bit(CFGS)
        Set EECON1.CFGS OFF
    #ENDIF

    'Enable write
    SET EECON1.WREN ON
    #ifdef bit(FREE)
        SET EECON1.FREE OFF
    #endif

    'Write enable code
    EECON2 = 0x55
    EECON2 = 0xAA

    'Start write, wait for it to finish
    SET EECON1.WR ON
    NOP
    NOP
    SET EECON1.WREN OFF

    'Enable Interrupt
    IntOn
#ENDIF
end sub
sub ProgramRead(In EEAddress, Out EEDataWord)
    Dim EEAddress As Word Alias EEADRH, EEADR
    #IFDEF Var(EEDATA)
        Dim EEDataWord As Word Alias EEDATH, EEDATA
    #ENDIF
    #IFDEF Var(EEDATL)
        Dim EEDataWord As Word Alias EEDATH, EEDATL
    #ENDIF

    'Disable Interrupt
    IntOff

    'Select program memory
    SET EECON1.EEPGD ON
    #IFDEF Bit(CFGS)
        Set EECON1.CFGS OFF
    #ENDIF

    'Start read, wait for it to finish
    SET EECON1.RD ON
    NOP
    NOP

    'Enable interrupt
    IntOn
end sub
sub ProgramErase(In EEAddress)
    Dim EEAddress As Word Alias EEADRH, EEADR

    'Disable Interrupt
    IntOff

    'Select program memory
    SET EECON1.EEPGD ON
    #IFDEF Bit(CFGS)
        Set EECON1.CFGS OFF
    #ENDIF

    SET EECON1.WREN ON
    #ifdef bit(FREE)
        SET EECON1.FREE ON
    #endif
    EECON2 = 0x55
    EECON2 = 0xAA
    SET EECON1.WR ON
    NOP
    NOP
    #ifdef bit(FREE)
        SET EECON1.FREE OFF
    #endif
    SET EECON1.WREN OFF

    'Enable interrupt
    IntOn
end sub