AN1320 APPLICATION NOTE

14/20

9.3 Appendix 3 - ballast.asm

;*****************************************************************************

;

;

MODULE Name:

Ballast.asm

;

;*****************************************************************************

.romsize 4

.vers "st6262"

.input "ST626x.INI"; ST626x data space & registers declaration

.input "VarDef.inc"

;==========================================================

; Data Variables

;==========================================================

Step

.DEF

084H,0FFH,0FFH,M

Repeat

.DEF

085H,0FFH,0FFH,M

NrTent

.DEF

086H,0FFH,0FFH,M

Media

.DEF

087H,0FFH,0FFH,M

Count

.DEF

088H,0FFH,0FFH,M

Sample

.DEF

089H,0FFH,0FFH,M

;==========================================================

; Ignition Sweep PWM Parameters

;==========================================================

.ORG

0F40H

.BYTE

0BEH,0BEH,0BEH,0BFH,0BFH,0BFH,0C0H,0C0H

.BYTE

0C0H,0C1H,0C1H,0C1H,0C2H,0C2H,0C2H,0C3H

.BYTE

0C3H,0C3H,0C4H,0C4H,0C4H,0C5H,0C5H,0C5H

.BYTE

0C6H,0C6H,0C6H,0C7H,0C7H,0C7H,0C8H,0C8H

.BYTE

0C8H,0C9H,0C9H,0C9H,0CAH,0CAH,0CAH,0CBH

.BYTE

0CBH,0CBH,0CCH,0CCH,0CCH,0CDH,0CDH,0CDH

.BYTE

0CEH,0CEH,0CFH,0CFH,0D0H,0D0H,0D1H,0D1H

.BYTE

0D1H,0D2H,0D2H,0D2H,0D3H,0D3H,0D3H,0D3H

;==========================================================

;

Inizialisation

;==========================================================

.org 880h

Init

reti

clr

IOR

; Disable Interrupts (Confirm Reset Value)

; *** Oscillator and internal Timer

ldi

OSCR,08h

; Set Prescaler ratio @ 1

ldi

TSCR,27h

; Timer1 no int, presc 128, lock

; ***

Port configuration

; Port A: All Input, No Interrupt, Pulled up, except PA4 Analog - PA4 = A/D (in), PA5 = N/C

ldi

DRA,10h

clr

DDRA

ldi

OPRA,10h

; Port B: port 2,6 and 7 output 0, push pull, value 1; port 3 input

;

PB0 = 6574 Disable PB2 = SW PWM (out), PB3 = POWER OK (in),

;

PB6 = PFC Disable (out), PB7 = HW PWM - AutoReload Timer (out)

clr

DRB

ldi

DDRB,0C5H

ldi

OPRB,0C5H