How to?????? >> square wave inverter. Feedback option needed

[Antorbd04]

Hi,
I design a Full bride Inverter. But I want to add feedback option to my project. I got 50Hz freq from my full bridge.
plz anyone help me!!!!!!!!!! How I add feedback to my project??????

DEFINE OSC 16
ON INTERRUPT GOTO UPDATE

DIR VAR BYTE
'************************* Assign some Interrupt associated aliases 
T0IE VAR INTCON.5 ' TMR0 Overflow Interrupt Enable 
T0IF VAR INTCON.2 ' TMR0 Overflow Interrupt Flag 
GIE VAR INTCON.7 ' Global Interrupt Enable 
PS0 VAR OPTION_REG.0 ' Prescaler ratio bit-0 
PS1 VAR OPTION_REG.1 ' Prescaler ratio bit-1 
PS2 VAR OPTION_REG.2 ' Prescaler ratio bit-2 
PSA VAR OPTION_REG.3 ' Prescaler Assignment (1=assigned to WDT 0=assigned to oscillator) 
T0CS VAR OPTION_REG.5 ' Timer0 Clock Source Select (0=Internal clock 1=External PORTA.4)

PWM1 VAR PORTC.5 ' Alias servo pin1
PWM2 VAR PORTC.6 ' Alias servo pin2 
TRISC = 000000 ' Configure PORTC as outputs 
PORTC = 0 ' Clear PORTB 
'********************* Initiate the interrupt 
GIE = 0 ' Turn off global interrupts 
PSA = 0 ' Assign the prescaler to external oscillator 
PS0 = 1 ' Set the prescaler 
PS1 = 1 ' to increment TMR0 
PS2 = 1 ' every 256th instruction cycle 
T0CS = 0 ' Assign TMR0 clock to internal source 
TMR0 = 0 ' Clear TMR0 initially 
T0IE = 1 ' Enable TMR0 overflow interrupt 
GIE = 1 ' Enable global interrupts

MAIN:

GOTO MAIN

DISABLE
UPDATE:
TMR0 = 100
IF DIR = 0 THEN
PWM1 = 1
PWM2 = 0
DIR = 1
ELSE 
PWM2 = 1
PWM1 = 0
DIR = 0
ENDIF
T0IF = 0
RESUME
ENABLE

[mpgmike]

Just some observations first:
"PORTC = 0 ' Clear PORTB", your comment says Clear PORTB yet your code states PORTC = 0
"MAIN:

GOTO MAIN" Add a pause in there; "MAIN: : PAUSE 10 : GOTO MAIN"

With that out of the way, what do you wish to look at for feedback? If you have an analog voltage, you can use an ADCIN 0, FB command followed with:
IF FB > X then
take action
endif
IF FB < X then
no action
endif

Let's start there before I type 3 pages and still not answer your question.

Mike