Microchip Technology MCP6 series Manual de usuario descargar pdf (Pagina 7)

 2004 Microchip Technology Inc. DS00900A-page 7

AN900

FIGURE 7: INTERRUPT SERVICE ROUTINE

Timer0 overflow?

ADC ready?

Calculate New

Target Velocity

ISR High Priority

ISR Low Priority

Yes

Read Sine Values

from Table*

Calculate New

Update Table Offsets*

Direction change?

Calculate Timer0

Reload Value*

Swap Phase 1 and

Phase 2 Offsets*

Yes

Return from

Interrupt

Duty Cycle based on

Target Speed and

*In actual implementation, a flag is set and operation is performed within the main loop.

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Microchip Technology MCP6 series Manual de usuario Pagina 7