/* p11_7.c Dead-time creation using DTI feature of TCC0
 *
 * See text for detailed description.
 *
 * PA08 = TCC0/WO[0], PB10 = TCC0/WO[4]
 *
 * Tested with Atmel Studio 7 v7.0.1006 and Keil MDK-ARM v5.21a.
 */
#include "samd21.h"
void TCC0_init(void);
unsigned char* ARRAY_PORT_PINCFG0 = (unsigned char*)&REG_PORT_PINCFG0;
unsigned char* ARRAY_PORT_PMUX0 = (unsigned char*)&REG_PORT_PMUX0;
unsigned char* ARRAY_PORT_PINCFG1 = (unsigned char*)&REG_PORT_PINCFG1;
unsigned char* ARRAY_PORT_PMUX1 = (unsigned char*)&REG_PORT_PMUX1;

int main(void) {
    TCC0_init();

    while (1) {
    }
}

void TCC0_init(void) {
    REG_GCLK_CLKCTRL = 0x401A;      /* GCLK0 -> TCC0, TCC1 */
    REG_PM_APBCMASK |= 0x00000100;  /* enable TCC0 Clock in PM */
    REG_TCC0_CTRLA = 1;             /* reset */
    while (REG_TCC0_CTRLA & 1) {}   /* wait till out of reset */
    REG_TCC0_WAVE = 7;              /* dual-slope TOP PWM */
    REG_TCC0_PER = 5000;            /* period */
    REG_TCC0_CC0 = 2500;            /* pulse width */
REG_TCC0_WEXCTRL = 0xFAFA0100;  /* 250 clock cycles dead-time both polarity */
REG_TCC0_CTRLA |= 2;            /* enable */

    ARRAY_PORT_PINCFG0[8] |= 1;     /* make PA08 output for TCC0/WO[0] */
    ARRAY_PORT_PMUX0[4] = 0x04;     /* PA08 = TCC0/WO[0] */
    ARRAY_PORT_PINCFG1[10] |= 1;    /* make PB10 output for TCC0/WO[4] */
    ARRAY_PORT_PMUX1[5] = 0x05;     /* PB10 = TCC0/WO[4] */
}