EVLB001 datasheet(21/35 Pages) ATMEL

21 / 35 page

ATPWMX Demonstrator Software

6-19

ATAVRFBKIT / EVLB001 User Guide

7597B–AVR–10/07

6.1.2

Control state

machine Global

variables

6.1.2.1

Input variables

which have an

impact on the

Control state

machine

• gv_lamp_on is necessary to determine whether the lamp is already on or not.

• g_too_many_ignition_tries can be set in lamp state machine.

6.1.2.2

Output variables

which can impact

other state

machines

•

gv_lamp preset current is set to the wanted value and depending on the

gv_lamp_on and g_too_many_ignition_tries values, gv_lamp_state,

gv_pfc_state and gv_lamp_on can be set to the following values

LAMP_OFF, SHUT_DOWN_PFC_AND_SLOW_DOWN_UC_SPEED, and 0

or 1.

6.2

Pfc_ctrl.c

This file executes the PFC state machine according to the scheduler in the

Main_pwmx_fluo_demo.c file.

6.2.1

PFC STATE

MACHINE

The PFC state machine functional diagram is shown in Figure 6-3.

Figure 6-3.

PFC State Machine

The different states are outlined below:

PFC_OFF

Nothing happens, the exit from this state is requested when the gv_lamp_preset_current

variable is modified in control_FBKIT.c file.

INIT_PFC

Nothing happens, the state machine automatically goes to next step

(INIT_PFC_HAVERSINE_CHECK) on the next pfc_task().

INIT_PFC_HAVERSINE_CHECK

Initialize the control values of the PFC.

Then jump to the HAVERSINE_CHECK state.

HAVERSINE_MEASURE

Measure the haversine peak voltage during HAVERSINE_MIN_CHECK_TIME.

Then jump to the HAVERSINE_CHECK state.

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