Maxim-integrated MAX31782 Uživatelský manuál stáhnout pdf (Strana 94)

Maxim Integrated 10-6

MAX31782 User’s Guide

Revision 0; 8/11

10.4 Tachometer Code Example

The following pseudocode shows how to set up tachometer 0. This example does not generate any interrupts, but

instead the captured tachometer value can be periodically polled by software.

Tachometer setup:

TACHCN0_bit.TPS=3;  //tachometerclockissysclk/64or62.5kHz

TACHCN0_bit.TRPS=1; //setfor2pulsesperrevolution

TACHCN0_bit.TEXEN=1; //enableedgecaptureofTACH.0pin

TACHCN0_bit.TACHE=1; //startthetachometercount

Reading the tachometer:

tach_counts=TACHR0; //storethecapturedtachometercountsforthelast

     revolutioninavariable

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Maxim-integrated MAX31782 Uživatelský manuál Strana 94