/*
 * Read switches and use the data to set LEDs for FRDM-KL25Z
 * with Wytec EduBase.  On Wytec EduBase board, PTC6-3 are connected
 * to the four LEDs and PTC13-10 are connected to both the DIP switches (SW1)
 * and the pushbuton switches (SW2-SW5).
 * In order for the pushbutton switches to be effective, the DIP switches
 * must be at the off position.
 */

#include <MKL25Z4.H>

int main(void)
{
    unsigned int data;

    /* enable PTC6-3 as output for LEDs */
    SIM->SCGC5 |= 0x800;        /* enable clock to Port C */
    PORTC->PCR[3] = 0x100;      /* make PTC3 pin as GPIO */
    PORTC->PCR[4] = 0x100;      /* make PTC4 pin as GPIO */
    PORTC->PCR[5] = 0x100;      /* make PTC5 pin as GPIO */
    PORTC->PCR[6] = 0x100;      /* make PTC6 pin as GPIO */
    PTC->PDDR |= 0x0078;        /* make PTC6-3 as output pin */


    /* enable PTC13-10 as input for switches */
    PORTC->PCR[10] = 0x100;     /* make PTC10 pin as GPIO */
    PORTC->PCR[11] = 0x100;     /* make PTC11 pin as GPIO */
    PORTC->PCR[12] = 0x100;     /* make PTC12 pin as GPIO */
    PORTC->PCR[13] = 0x100;     /* make PTC13 pin as GPIO */
    PTC->PDDR &= ~0x3C00;       /* make PTC13-10 as input pin */

    for (;;)
    {
        data = PTC->PDIR;       /* read the switches */
        PTC->PDOR = data >> 7;  /* and write to LEDs */
    }
}