/*
 * Program to generate 5.2 kHz pulse width modulation
 * on Port P 0 and 1
 */
#include "hc12.h"

main()
{
    /* Choose 8-bit mode */
    PWCLK = PWCLK & ~0xC0;
    /* Choose left-aligned */
    PWCTL = PWCTL & ~0x08;
    /* Choose polarity */
    PWPOL = PWPOL | 0x0f;
    /* Select clock mode 1 for Channels 1 and 0 */
    PWPOL = PWPOL | 0x30;
    /* Select N = 0 and M = 2 for Channels 1 and 0 */
    PWCLK = PWCLK & ~0x38;    /* N = 0 */
    PWSCAL0 = 0x02;           /* M = 2 */
    /* Select period of 256 for Channels 1 and 0 */
    PWPER1 = 255;             /* Period 1 = PWPER1 + 1 */
    PWPER0 = 255;             /* Period 0 = PWPER0 + 1 */
    /* Enable PWM on Channels 1 and 0 */
    PWEN = PWEN | 0x03;

    PWDTY1 = 127;  /* 50% duty cycle on Channel 1 */    
    PWDTY0 = 63;   /* 25% duty cycle on Channel 0 */    
}