16F684 Basic Functionality

[munromh]

Having a few problems getting some basic functions to work properly on a 16F684, not sure if I can see the forest through the trees now. Basically I can't get the toggle function to work, works fine if I set a pin to 1 then 0. Also, if I have a SEROUT pin on the same Port as a Pin I'm manually toggling the SEROUT works but the toggle doesn't, move the SEROUT to a different port and all's fine:

'16f684

DEFINE OSC 8 'Oscillator speed in MHz

OSCCON  =   %01110111       'Page 20

ANSEL   =   %00000000       

TRISA   =   %00000000		
TRISC   =   %00000000		

PortA   =   %00000000
PortC   =   %00000000

WPUA    =   %00000000

CMCON0  =   %00000000

ADCON0  =   %00000000
ADCON1  =   %00000000
                      
Heart_Beat_LED  Var portC.1 'Output pin to LED for Heart Beat indication, Low is on. 
Heart_Beat_LED  =   0

Terminal_TX     var	PortC.2	'Output pin to the dumb terminal or PC program on port C

Start:

'Uncomment subroutine 1, 2, or 3

'Goto Subroutine_1
'Goto Subroutine_2
'Goto Subroutine_3

goto Start


Subroutine_1:   'This works.

    Heart_Beat_LED = 1
    Pause 1000
    Heart_Beat_LED = 0
    Pause 1000
    Goto Start


Subroutine_2:   'Pin is "low" and can be seen cycling between 125mV and 75mV on a scope. 
                'both serial out's seen on terminal.
                'If I move the Terminal_TX to PortA it works.
                
    Heart_Beat_LED = 1
    serout Terminal_TX,6,["1-Heart_Beat_LED",13,10] 
    Pause 1000
    
    Heart_Beat_LED = 0
    serout Terminal_TX,6,["2-Heart_Beat_LED",13,10]
    Pause 1000
    Goto Start


Subroutine_3:   'Doesn't work 

    Toggle Heart_Beat_LED
    Pause 1000
    Goto Start