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Application of the ECAP Module

32.3.3.1 Code Snippet for CAP Mode Delta Time, Rising Edge Trigger

// Code snippet for CAP mode Delta Time, Rising edge trigger

// Initialization Time

//=======================

// ECAP module 1 config

ECap1Regs.ECCTL1.bit.CAP1POL = EC_RISING;

ECap1Regs.ECCTL1.bit.CAP2POL = EC_RISING;

ECap1Regs.ECCTL1.bit.CAP3POL = EC_RISING;

ECap1Regs.ECCTL1.bit.CAP4POL = EC_RISING;

ECap1Regs.ECCTL1.bit.CTRRST1 = EC_DELTA_MODE;

ECap1Regs.ECCTL1.bit.CTRRST2 = EC_DELTA_MODE;

ECap1Regs.ECCTL1.bit.CTRRST3 = EC_DELTA_MODE;

ECap1Regs.ECCTL1.bit.CTRRST4 = EC_DELTA_MODE;

ECap1Regs.ECCTL1.bit.CAPLDEN = EC_ENABLE;

ECap1Regs.ECCTL1.bit.PRESCALE = EC_DIV1;

ECap1Regs.ECCTL2.bit.CAP_APWM = EC_CAP_MODE;

ECap1Regs.ECCTL2.bit.CONT_ONESHT = EC_CONTINUOUS;

ECap1Regs.ECCTL2.bit.SYNCO_SEL = EC_SYNCO_DIS;

ECap1Regs.ECCTL2.bit.SYNCI_EN = EC_DISABLE;

ECap1Regs.ECCTL2.bit.TSCTRSTOP = EC_RUN; // Allow TSCTR to run

// Run Time ( e.g. CEVT1 triggered ISR call)

//==========================================

// Note: here Time-stamp directly represents the Period value.

Period4 = ECap1Regs.CAP1; // Fetch Time-Stamp captured at T1

Period1 = ECap1Regs.CAP2; // Fetch Time-Stamp captured at T2

Period2 = ECap1Regs.CAP3; // Fetch Time-Stamp captured at T3

Period3 = ECap1Regs.CAP4; // Fetch Time-Stamp captured at T4

1659

SPNU562–May 2014 Enhanced Capture (eCAP) Module

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