WeX – Waveform Extension

void initTIMER4(uint16_t top, uint16_t a/*, uint16_t b, uint16_t c, uint16_t d*/)

{

  TCC4.CTRLA = TC45_CLKSEL_DIV1_gc;  // Clock = System Clock

  TCC4.CTRLB = TC45_BYTEM_NORMAL_gc  // Normaler Byte Modus

         | TC45_WGMODE_SINGLESLOPE_gc;  // Single Slope Waveform Modus

  TCC4.CTRLE = TC45_CCAMODE_COMP_gc  // A Compare Mode 

      |    TC45_CCBMODE_COMP_gc  // B Compare Mode 

      |    TC45_CCCMODE_COMP_gc  // C Compare Mode

      |    TC45_CCDMODE_COMP_gc;  // D Compare Mode

  /*TCC4.INTCTRLB = TC45_CCAINTLVL_LO_gc  // Compare Interrupt A auf Low Level

        |   TC45_CCBINTLVL_LO_gc  // Compare Interrupt B auf Low Level

        |   TC45_CCCINTLVL_LO_gc  // Compare Interrupt C auf Low Level

        |   TC45_CCDINTLVL_LO_gc;  // Compare Interrupt D auf Low Level

  PMIC.CTRL |= PMIC_LOLVLEN_bm;  // LOW Level Interrupt aktivieren*/

  TCC4.PER = top;  // Top Wert

  TCC4.CCA = a;  // Vergleichswert A

  /*TCC4.CCB = b;  // Vergleichswert B

  TCC4.CCC = c;  // Vergleichswert C

  TCC4.CCD = d;  // Vergleichswert D*/

}

void initWEX(uint16_t deadTime)

{

  WEXC.CTRL = WEX_OTMX2_bm  // Output Matrix 1

      |   WEX_DTI0EN_bm  // Dead Time Generator 1

      |   WEX_DTI1EN_bm  // Dead Time Generator 2

      |   WEX_DTI2EN_bm  // Dead Time Generator 3

      |   WEX_DTI3EN_bm;  // Dead Time Generator 4 

  WEXC.DTBOTH = deadTime;

  PORTC.DIRSET = PIN2_bm;

  PORTC.DIRSET = PIN3_bm;

  PORTC.DIRSET = PIN4_bm;

  PORTC.DIRSET = PIN5_bm;

}

void wex_freq(uint16_t x)

{

  TCC4.PER = x;  // Top Wert

  TCC4.CCA = x/2;  // Vergleichswert A

}

int main(void)

{

  initTIMER4(300,150);

  initWEX(10);

while(1)

    {

    for (uint32_t counter=0; counter<0x0FFFF; counter++)

    {

      nop();

    }

    if (i>10)

    {

      wex_freq(i);

      i--;

    }

    else

    {

      i = 0xFFF;

    }

    }

}