USBDemo, something to learn USB a little bit

[jellis00]

:(

The USB routines are not setup to handle a resume.
So your best bet it probably to connect the +5V from the USB cable to one of the INT pins with a pull-down resistor.
When the cable gets plugged in, it will generate an interrupt, at which point you would execute an @ RESET to reset the processor and initialize the USB again.
HTH

OK, so I made changes to my code per your suggestions (see partial code below) including an IF Plugged =1 test in the Main loop to pole for USB connection and go to my USB servicing procedure when connected. I didn't do anything to get SLEEP mode yet because I want to make sure the interrupts are working first in this code.
This code compiles, but creates a single error during assembly that says
"Error[101]c:\PathToAsmfile.asm 1132:ERROR:(INT_ENABLE priority state not found)". So I can't get it to run yet with this error.
I'm not sure what this error is telling me...the required statement for @ INT_ENABLE INT2_INT is in the code. Does it also require an INT_ENABLE USB_HANDLER statement for the USB interrupt??

Include "Modedefs.Bas"
INCLUDE "DT_INTS-18.bas"    ' Base Interrupt System
INCLUDE "ReEnterPBP-18.bas" ' Include if using PBP high priority interrupts
INCLUDE "ALLDIGITAL.pbp"    ' Sets all registers for digital ops.

DEFINE OSC 48

;--- if you un-comment these, you must comment the ones in the .inc file--
ASM ; 18F2550/4550, 8mhz crystal
   __CONFIG    _CONFIG1L, _PLLDIV_2_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
   __CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H
   __CONFIG    _CONFIG2L, _PWRT_ON_2L & _BOR_OFF_2L & _VREGEN_ON_2L
   __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
   __CONFIG    _CONFIG3H, _PBADEN_OFF_3H ; PortB resets as digital
   __CONFIG    _CONFIG4L, _LVP_OFF_4L & _XINST_OFF_4L
ENDASM

' Initialize Hardware 
' ===================
    Spare_1         VAR PORTB.7   ' PGD for ICSP & Spare I/O for normal ops
    Spare_2         VAR PORTB.6   ' PGC for ICSP & Spare I/O for normal ops 
    'Set registers
      TRISA = 0             ' PORTA all outputs for LCD use              
      TRISB =%00011000      ' RB4 & RB3 set as RTC Alarm1 & Alarm2 inputs 
      TRISC = 0      
      TRISD = 0 
      TRISE = 0
   
'------------SETUP FOR USING DS1337 Real Time Clock (RTC)--------------- 
'*********************************************************************** 
' Setup Hardware for uart
' =======================
    DEFINE HSER_BAUD 115200
    DEFINE HSER_RCSTA 90h
    DEFINE HSER_TXSTA 24h
    DEFINE HSER_CLROERR 1

' Aliased Variables for CLock 
' =========================== 
    Alarm1      VAR PORTB.4     ' Alarm1 input from DS1337 INTA
    Alarm2      VAR PORTB.3     ' Alarm2 input from DS1337 INTB
    SCL         VAR PORTB.1     ' I2C clock pin 
    SDA         VAR PORTB.0     ' I2C data pin 
    RTC         CON %11010000   ' RTC device write address(byte addressing)
    ' This is a list of allowable clock contrl settings, one which must be
    ' setup in the SetTimeAndDate subroutine as intended.                   
    'contrl     CON %00000011   ' Starts the oscillator, sets the SQW/OUT 
                                ' to 1 Hz, enables INTA interrupt from A1F
                                ' or from A2F.  WORKS as intended!!
    'contrl     CON %00000111   ' Starts oscillator, enables INTA interrupt 
                                ' from A1F or INTB from A2F. WORKS OK! 
                                ' Both interrupts staggered 30 secs apart.
 
' RTC Address definitions
' ======================== 
    SecReg      CON $00   ' seconds address (00 - 59) 
                          ' MSB of SecReg must be set to a 0 to enable RTC 
    MinReg      CON $01   ' minutes address (00 - 59) 
    HourReg     CON $02   ' hours address (01 - 12) or (00 - 23) 
    DayReg      CON $03   ' day address (1 - 7) 
    DateReg     CON $04   ' date address (01 - 28/29, 30, 31) 
    MonthReg    CON $05   ' month address (01 - 12) 
    YearReg     CON $06   ' year address (00 - 99) 

' Alarm 1 Address definitions 
' ===========================
    Alm1sec     CON $07   ' Alarm 1 seconds address (00 - 59) 
    Alm1min     CON $08   ' Alarm 1 minutes address (00 - 59)
    Alm1hr      CON $09   ' Alarm 1 hours address (01 - 12) or (00 - 23) 
    Alm1Day     CON $0A   ' Alarm 1 day address (1 - 7)

' Alarm 2 Address definitions 
' ===========================
    Alm2min     CON $0B   ' Alarm 2 minutes address (00 - 59)
    Alm2hr      CON $0C   ' Alarm 2 hours address (01 - 12) or (00 - 23) 
    Alm2Day     CON $0D   ' Alarm 2 day address (1 - 7)

' Alias of Clock register addresses
' =================================
   ContReg     CON $0E         ' CONTROL register address 
   StatusReg   CON $0F         ' STATUS register address
 
' Clock Variables
' ================
    sec         VAR BYTE  ' seconds 
    MINs        VAR BYTE  ' minutes 
    hr          VAR BYTE  ' hours 
    day         VAR BYTE  ' day 
    date        VAR BYTE  ' date 
    mon         VAR BYTE  ' month 
    yr          VAR BYTE  ' year 

' ALARM1 VARIABLES
' ================
    A1sec       VAR BYTE  ' seconds 
    A1MINs      VAR BYTE  ' minutes 
    A1hr        VAR BYTE  ' hours 
    A1day       VAR BYTE  ' day 
    
' ALARM2 VARIABLES
' ================
    A2MINs      VAR BYTE  ' minutes
    A2hr        VAR BYTE  ' hours
    A2day       VAR BYTE  ' day
                           
GoSub SetTimeAndDate        ' Setup current time & alarm settings 

'*----------------SETUP FOR USING USB INTERFACE------------------------- 
'*********************************************************************** 
INCLUDE "DT_HID260.pbp"

DEFINE USB_VENDORID    6017
DEFINE USB_PRODUCTID   2000
DEFINE USB_VERSION     1
DEFINE USB_VENDORNAME  "Mister E/DT"
DEFINE USB_PRODUCTNAME "USBDemo"
DEFINE USB_SERIAL      "001"
DEFINE USB_INSIZE      8    ;  IN report is PIC to PC (8,16,32,64)
DEFINE USB_OUTSIZE     8    ; OUT report is PC to PIC
DEFINE USB_POLLIN      10   ; Polling times in mS, MIN=1 MAX=10
DEFINE USB_POLLOUT     10

; --- Each USB status LED is optional, comment them if not used ---------
; ---They can be assigned to any pin, and no further action is required -- 
;DEFINE USB_LEDPOLARITY 1       ; LED ON State [0 or 1]  (default = 1)
;DEFINE USB_PLUGGEDLED  PORTB,7 ; LED indicates if USB is connected
;DEFINE USB_TXLED       PORTB,6 ;  "      "     data being sent to PC
;DEFINE USB_RXLED       PORTB,5 ;  "      "     data being received from PC

;--- Variables ----------------------------------------------------------
Value0      VAR  WORD
Value1      VAR  WORD
X           VAR  WORD
DUTY1       VAR  WORD
DUTY2       VAR  WORD
Old_PORTA   VAR  BYTE
New_PORTA   VAR  BYTE

;--- Setup ADC ----------------------------------------------------------
DEFINE ADC_BITS 8  ; Number of bits in ADCIN result

;--- Initialize ---------------------------------------------------------
CCPR1L = 0
CCPR2L = 0
CCP1CON =   %00001100       ' CCP1, PWM mode
CCP2CON =   %00001100       ' CCP2, PWM mode
PR2     =   249             ' 0-1000 duty range
T2CON   =   %00000101       ' TMR2 on, prescaler 1:4

TRISB = 0
OUTPUT PORTC.1
OUTPUT PORTC.2
    
ADCON2.7 = 0       ; left justify    (Change this if ADFM in diff register)
ADCON1 = %1101     ; AN0/AN1 Analog

'------------------------SETTINGS FOR INTERRUPTS------------------------ 
'*********************************************************************** 
'Set interrupt related registers
    RCON.7 = 1     ' Set Interrupt Priority Enable bit (Bit7=IPEN) 
                         ' to enable priority levels on interrupts
    INTCON.7 = 1         ' Set Global Interrupt Enable bit
    INTCON.6 = 1         ' Set PEIE to enable low priority periph interrupts
    INTCON2 = %10001000  ' Enable PORTB Pull-ups (Bit7-high), set INTEG2
                         ' for falling edge (Bit4-low) on RTC's interrupt.
    INTCON3 = %10001000  ' Set INT2IP high priority (Bit7-high), 
                         ' enable INT2IE for interrupt(Bit4-high)
    RTC_INT_FLG  VAR INTCON3.1 'Alias for RB4 INTA interrupt from RTC
'Setup external interrupt macros
ASM
INT_LIST  macro    ; IntSource,         Label,  Type, ResetFlag?
        INT_Handler   USB_Handler
        INT_Handler   INT2_INT,        _Alarm,   PBP,  yes
    endm
    INT_CREATE                ; Creates the interrupt processor
ENDASM
@    INT_ENABLE   INT2_INT     ; enable external (INT) interrupts

'  -----------------------BEGIN MAIN PROGRAM LOOP----------------------- 
'***********************************************************************  
Main:
    Pause 1000
    IF Plugged = 1 THEN
        HIGH PORTC.6 
        GOTO USB  ' USB cable is plugged-in
    ENDIF
    ' Else, do other things if not connected
    ' If Alarm interrupt, read current time & ALARM settings from DS1337
    ' Perform range measurements if Midnight
    LOW PORTC.6
USB:
    'Process data from EEPROM to PC via USB interface        
    
    GoTo Main                       ' Endless Loop 
End     ' Safety measure to insure program stops if reaches here 

'--------------------( Begin Interrupt Handler )------------------------ 
'*********************************************************************** 
Alarm:
       HIGH PORTC.7      ' Test LED if Interupt
       '  Put code here to service the Alarm interrupt
       LOW PORTC.7     
    ' Resume Main Program 
@ INT_RETURN
End     ' Safety measure to insure program stops if reaches here
'------------------{ End of Interrupt Handler }---------------------------

' START LIST OF SUBROUTINES
'**************************