User`s guide

// Initalize EVA Timer2

EvaRegs.T2PR = 0x03FF; // Timer2 period

EvaRegs.T2CMPR = 0x03C0; // Timer2 compare

EvaRegs.T2CNT = 0x0000; // Timer2 counter

// TMODE = continuous up/down

// Timer enable

// Timer compare enable

EvaRegs.T2CON.all = 0x1042;

// Setup T1PWM and T2PWM

// Drive T1/T2 PWM by compare logic

EvaRegs.GPTCONA.bit.TCMPOE = 1;

// Polarity of GP Timer 1 Compare = Active low

EvaRegs.GPTCONA.bit.T1PIN = 1;

// Polarity of GP Timer 2 Compare = Active high

EvaRegs.GPTCONA.bit.T2PIN = 3;

// Enable compare for PWM1-PWM6

EvaRegs.CMPR1 = 0x0C00;

EvaRegs.CMPR2 = 0x3C00;

EvaRegs.CMPR3 = 0xFC00;

// Compare action control. Action that takes place

// on a compare event

// output pin 1 CMPR1 - active high

// output pin 2 CMPR1 - active low

// output pin 3 CMPR2 - active high

// output pin 4 CMPR2 - active low

// output pin 5 CMPR3 - active high

// output pin 6 CMPR3 - active low

EvaRegs.ACTRA.all = 0x0666;

EvaRegs.DBTCONA.all = 0x0000; // Disable deadband

EvaRegs.COMCONA.all = 0xA600;

}

Even if the code is richly commented, some clarifications should be made.

GPTCONA is called bitwise in the code above - an alternative way to set the T1PWM and

T2PWM is to use the command: EvaRegs.GPTCONA.all = 0x0049 (see chap. 5 of Event

Manager Register Guide)

In the same way we could replace EvaRegs.ACTRA.all = 0x0666 with the following lines:

EvaRegs.ACTRA.bit.CMP1ACT1 = 1;

EvaRegs.ACTRA.bit.CMP2ACT0 = 1;

EvaRegs.ACTRA.bit.CMP3ACT1 = 1;

EvaRegs.ACTRA.bit.CMP4ACT0 = 1;

EvaRegs.ACTRA.bit.CMP5ACT1 = 1;

EvaRegs.ACTRA.bit.CMP6ACT0 = 1;

It’s a matter of personal taste since what is lost in space is on the other hand gained in clarity.