avr tiny1 series / attiny412 und Timer TCD

#include <avr/io.h>

#define SIGNAL_PERIOD_EXAMPLE_VALUE            (0xC8)

#define SIGNAL_DUTY_CYCLE_EXAMPLE_VALUE        (0x64)

void TCD0_init(void)

{    

    /* set the waveform mode */

    TCD0.CTRLB = TCD_WGMODE_DS_gc;

    /* set the signal period */

    TCD0.CMPBCLR = SIGNAL_PERIOD_EXAMPLE_VALUE;    

    /* the signals are alternatively active and a small

       symmetric dead time is needed */

    TCD0.CMPBSET = SIGNAL_DUTY_CYCLE_EXAMPLE_VALUE + 1;                                        

    TCD0.CMPASET = SIGNAL_DUTY_CYCLE_EXAMPLE_VALUE - 1;    

    /* ensure ENRDY bit is set */

    while(!(TCD0.STATUS & TCD_ENRDY_bm))

    {

        ;

    }

    TCD0.CTRLA = TCD_CLKSEL_20MHZ_gc        /* choose the timer's clock */

               | TCD_CNTPRES_DIV1_gc        /* choose the prescaler */

               | TCD_ENABLE_bm;                /* enable the timer */

}

void TCD0_enableOutputChannels(void)

{

    /* enable write protected register */

    CPU_CCP = CCP_IOREG_gc;    

    TCD0.FAULTCTRL = TCD_CMPAEN_bm            /* enable channel A */

                   | TCD_CMPBEN_bm;            /* enable channel B */

}

void PORT_init(void)

{

    PORTA.DIRSET = PIN6_bm            /* set pin 4 as output */

                    | PIN7_bm        /* set pin 5 as output */

                    | PIN3_bm;

}

int main() {

    PORT_init();

    TCD0_init();

    TCD0_enableOutputChannels();

    while(true) {

        PORTA.OUTTGL = PIN3_bm;

    }    

}