Precautions using K series PIC's

{
*****************************************************************************
*  Name    : UNTITLED.BAS                                                  *
*  Author  : Doug Bezaire                                                  *
*  Notice  : Copyright (c) 2010 [select VIEW...EDITOR OPTIONS]              *
*          : All Rights Reserved                                            *
*  Date    : 3/26/2010                                                      *
*  Version : 1.0                                                            *
*  Notes  :                                                                *
*          :                                                                *
*****************************************************************************
}
Device = 18F2420
Clock = 8

Include "InternalOscillator.bas"
Include "RandGen.bas"
Include "Utils.bas"
Dim TMR2IE As PIE1.1,        // TMR2 interrupt enable
    TMR2IF As PIR1.1,        // TMR2 overflow flag
    TMR2ON As T2CON.2,        // Enables TMR2 to begin incrementing
    Signal_Pin As PORTB.0    // Signal output to frequency meter
Dim Red_Pin As PORTA.0,        //was b.0
    Green_Pin As PORTA.1,      //was b1
    Blue_Pin As PORTA.2,        //was b2
    Red_Duty As Byte,
    Green_Duty As Byte,
    Blue_Duty As Byte,
    Red_DutyVal As Byte,
    Green_DutyVal As Byte,
    Blue_DutyVal As Byte,
    RandomVal As Byte
 
Dim uS As Word,
    mS As Word         
  // ranval(1)as word
Interrupt TMR2_Interrupt()
    High(Signal_Pin)
    Save(0)                  // Back up system variables 
    If TMR2IF = 1 Then        // Check if the interrupt was from TMR2 
        TMR2IF = 0            // Clear the TMR2 interrupt flag
        uS = uS + 50
        If uS >= 1000 Then
            uS = uS - 1000
            Inc(mS)
        EndIf     
        Inc(Red_DutyVal)
        Inc(Green_DutyVal)
        Inc(Blue_DutyVal)
        If Red_DutyVal > Red_Duty Or Red_Duty = 0 Then
            Red_Pin = 0
        Else
            Red_Pin = 1
        EndIf
        If Green_DutyVal > Green_Duty Or Green_Duty = 0 Then
            Green_Pin = 0
        Else
            Green_Pin = 1
        EndIf
        If Blue_DutyVal > Blue_Duty Or Blue_Duty = 0 Then
            Blue_Pin = 0
        Else
            Blue_Pin = 1
        EndIf             
    EndIf                    //
    Restore                  // Restore system variables
    Low(Signal_Pin)
End Interrupt
Private Sub TMR2_Initialize()
    TMR2ON = 0                // Disable TMR2
    TMR2IE = 0                // Turn off TMR2 interrupts 
    PR2 = 149                // TMR2 Period register PR2
    T2CON = %00000001        // T2CON 0:1 = Prescale
                              //        00 = Prescale is 1:1
                              //        01 = Prescale is 1:4
                              //        1x = Prescale is 1:16                               
                              //      3:6 = Postscale             
                              //    0000 = 1:1 postscale
                              //    0001 = 1:2 postscale
                              //    0010 = 1:3 postscale...
                              //    1111 = 1:16 postscale
    TMR2 = 0                  // Reset TMR2 Value 
    TMR2IE = 1                // Enable TMR2 interrupts
    TMR2ON = 1                // Enable TMR2 to increment
    Enable(TMR2_Interrupt)
End Sub
// Start Of Program...
Low(Red_Pin)
Low(Green_Pin)
Low(Blue_Pin)
Red_Duty = 30
Green_Duty = 10
Blue_Duty = 5
Red_DutyVal = 0
Green_DutyVal = 0
Blue_DutyVal =0
uS = 0
mS = 0

RandGen.Initialize(128)      // Initialize the Random Number generator
TMR2_Initialize              // Setup and enable TMR2
While True                    // Create an infinite loop
    RandomVal = RandGen.Rand  // Grab a random number from 0 to 255
    // Select RandomVal        // Find out what colour to increase/decrease
        //Case 0 To 42
            Red_Duty =RandomVal-5
                //mS = 0
            // (Red_Duty)=Rand(1)
              // Repeat
              // Until mS = 19
              // and Red_Duty>0
          // endif
         
           
        //Case 43 To 84
            If Red_Duty > 0
              Then  mS = 0
                Repeat
                Until mS = 19
                Dec(Red_Duty)
            EndIf
      // Case 84 To 127
            Green_Duty =RandomVal-20
              //Then  mS = 0
              //  Repeat
              //  Until mS = 19
              //  Inc(Green_Duty)
          // EndIf
      // Case 128 To 170
            If Green_Duty > 0
              Then  mS = 0
                Repeat
                Until mS = 19
                Dec(Green_Duty)
            EndIf
      //  Case 170 To 212
            Blue_Duty = RandomVal-30
            // Then  mS = 0
              //  Repeat
              //  Until mS = 19
              //  Inc(Blue_Duty)
          // EndIf
      // Case 212 To 255
            If Blue_Duty > 0
              Then  mS = 0
                Repeat
                Until mS = 19
                Dec(Blue_Duty)
            EndIf
            Wend
         
        End