Motorola M68HC08 manual Main Software Flowchart Main Software Loop

Freescale Semiconductor, Inc.

Software Design

Freescale Semiconductor, Inc.

NO

FAILURE

YES

FAULT STATE:

–STOP MOTOR

–WAIT UNTIL FAULT CLEAR

APPLICATION INITIALIZATION:

–CURRENT OFFSET CALIBRATION

–SYSTEM REGISTERS INITIALIZATION

–PWM INITIALIZATION

–TIMER 1 CURRENT SENSING TO PWM SYNCHRONIZATION

–ADC MEASUREMENT INIT.

STAND-BY
STATE:
– CHECK START STOP SWITCH
– IF PC MASTER S/W MODE:
	CHECK STARTCTRL FLAG
–	IF RUN CONDITIONS:
	SET STOP_F FLAG
	YES
	Stop_F Flag
	NO
	NO
	DC-Bus over-voltage
	YES
–	SET FAILURE.B.VOLTAGEFAILURE
	NO

Stop_F Flag or Failure

ALIGNMENT STATE:

–TIME ALIGNMENT (TIMER3)

–APPLY VOLTAGE

–CURRENT CONTROL LOOP

–IF STOP OR FAULT CONDITION: STOP MOTOR

EXIT RUNNING STATE

YES

Stop_F Flag or Failure

NO

STARTING (ACQUISITION) STATE:

–PWM INCREMENT OF

–STARTINCROUTREGS8

–SET SPEED REGULATOR INTEGRAL PORTION ACCORDING TO

CUR- RENT REGULATOR

–FIRST COMMUTATION STEP

–SECOND COMMUTATION STEP

–ACQUISITION STATE MOTOR COMMUTATION LOOP

–IF I_CNTR_FOK SUCCESSIVE CORRECT COMMUTATIONS:

EXIT STARTING (AQ.) STATE

–IF STOP OR FAULT CONDITION: STOP MOTOR

EXIT RUNNING STATE

YES

Stop_F Flag or Failure

NO

RUNNING:

–SET TIMER PERIOD FOR SPEED REGULATOR (VIRTUAL TIMER3)

–MOTOR COMMUTATION CONTROL LOOP

–MOTOR SPEED CONTROL LOOP

–IF STOP OR FAULT CONDITION: STOP MOTOR

EXIT RUNNING STATE

YES

Figure 5-5. Main Software Flowchart — Main Software Loop

Designer Reference Manual		DRM028 — Rev 0
86	Software Design	MOTOROLA
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