No. Surely I didn't mean that. You can't do the programming with those lines
commented out.

What I mean is somewhere 10+ lines after the label 'Main'. If I remember
correctly, I saw in earlier version source it's not commented out.

Best regards,
WH Tan

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
Of Chen Xiao Fan
Sent: 14 July 2005 17:22
To: 'Microcontroller discussion list - Public.'
Subject: RE: [PIC] PICKIT 2 (was PICKit1 & PIC18F2550)


I am using version 2.02 firmware for the PICkit 1 but I do not
see that VppON and VppOff being commented out. Attached is the
firmware source code that I have.

Regards,
Xiaofan

Version 2.02 download from Microchip:

;***************************************************************************
***
; EnterProgramMode
;  Issues Enter Program Mode command to PIC12F629/675. Clears ProgramCntr.
;   Inputs:	none
;   Outputs:	none
;***************************************************************************
***
EnterProgramMode
	call	VppInit		; Initiate Vpp PWM
	call	VppOff		; Turn Vpp off
	call	VppHigh		; Set Vpp to 13v (when it's turned on)

	bcf	PORTC,ICSPDATA	; make both clock and data outputs
	bcf	PORTC,ICSPCLOCK
	bsf	STATUS,RP0
	bcf	TRISC,ICSPDATA	; make both clock and data outputs
	bcf	TRISC,ICSPCLOCK
	bcf	STATUS,RP0


	movlw	0x3F		; force clock and data pin low
	andwf	PORTC,f
	call	Delay2_5ms	; delay
	call	Delay2_5ms

	clrf	ProgramCntr
	clrf	ProgramCntr+1
	decfsz	ProgramCntr,f	; wait 65536x3 instructions (~160ms)
	goto	$-1
	decfsz	ProgramCntr+1,f
	goto	$-3

	call	VppOn		; Turn Vpp on

	decfsz	ProgramCntr,f	; wait 256x3 instructions (~128us)
	goto	$-1		; ProgramCntr is clear upon leaving function

	call	VddOn		; turn on Vdd

	decfsz	ProgramCntr,f	; wait 65536x3 instructions (~160ms)
	goto	$-1
	decfsz	ProgramCntr+1,f
	goto	$-3
	return

Version 1.0 from Microchip:

;***************************************************************************
***
; EnterProgramMode
;  Issues Enter Program Mode command to PIC12F629/675. Clears ProgramCntr.
;   Inputs:	none
;   Outputs:	none
;***************************************************************************
***
EnterProgramMode
	bsf	STATUS,RP0
	movlw	0x02
	movwf	TRISC		; RC1 is input; RC0,RC2-RC7 are outputs
	bcf	STATUS,RP0
	movlw	.85		; Clear ProgramCntr (see later in function)
	movwf	ProgramCntr
	clrf	ProgramCntr+1
	movlw	0x3F		; force clock and data pin low
	andwf	PORTC,f
	call	Delay		; 4 ms delay
	call	Delay
	call	VppOn		; turn on Vpp
	decfsz	ProgramCntr	; wait 85x3 instructions (~40us)
	goto	$-1		; ProgramCntr is clear upon leaving function
	call	VddOn		; turn on Vdd
	return

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