Embedded-Systems-Code/utils.c at master · hp298/Embedded-Systems-Code · GitHub

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#include <MK64F12.h>
#include "utils.h"


/*----------------------------------------------------------------------------
  Function that initializes LEDs
 *----------------------------------------------------------------------------*/
void LED_Initialize(void) {

  SIM->SCGC5    |= (1 <<  10) | (1 <<  13);  /* Enable Clock to Port B & E */
  PORTB->PCR[22] = (1 <<  8) ;               /* Pin PTB22 is GPIO */
  PORTB->PCR[21] = (1 <<  8);                /* Pin PTB21 is GPIO */
  PORTE->PCR[26] = (1 <<  8);                /* Pin PTE26  is GPIO */

  PTB->PDOR = (1 << 21 | 1 << 22 );          /* switch Red/Green LED off  */
  PTB->PDDR = (1 << 21 | 1 << 22 );          /* enable PTB18/19 as Output */

  PTE->PDOR = 1 << 26;            /* switch Blue LED off  */
  PTE->PDDR = 1 << 26;            /* enable PTE26 as Output */
}

/*-------------------------------------------------------
  Function that initializes SW2 and SW3 push button switches
 *---------------------------------------------------------*/
void bttn_Initialize(void) {

	NVIC_EnableIRQ(PORTC_IRQn);															/* Enable */
	NVIC_EnableIRQ(PORTA_IRQn);															/* Enable */

	SIM->SCGC5    |= (1 << 9) | (1 << 11);     							/* Enable Clock to Port A & C */
	PORTC->PCR[6] &= ~PORT_PCR_MUX_MASK;      						 	/* Configure Switch SW2 */
	PORTA->PCR[4] &= ~PORT_PCR_MUX_MASK;       							/* Configure Switch SW3 */

	PORTC->PCR[6] = 0xA0100; 																/* Connect Switch as interrupt */
	PORTA->PCR[4] = 0xA0100; 																/* Connect Switch as interrupt */

	PTC->PDDR &= ~GPIO_PDDR_PDD(1<<4);      							 	/* Assign switch to input */
	PTA->PDDR &= ~GPIO_PDDR_PDD(1<<4);     								  /* Assign switch to input */


}

/*----------------------------------------------------------------------------
  Function that toggles the red LED
 *----------------------------------------------------------------------------*/

void LEDRed_Toggle (void) {
	PTB->PTOR = 1 << 22; 	   /* Red LED Toggle */
}

/*----------------------------------------------------------------------------
  Function that toggles the blue LED
 *----------------------------------------------------------------------------*/
void LEDBlue_Toggle (void) {
	PTB->PTOR = 1 << 21; 	   /* Blue LED Toggle */
}

/*----------------------------------------------------------------------------
  Function that toggles the green LED
 *----------------------------------------------------------------------------*/
void LEDGreen_Toggle (void) {
	PTE->PTOR = 1 << 26; 	   /* Green LED Toggle */
}

/*----------------------------------------------------------------------------
  Function that turns on Red LED & all the others off
 *----------------------------------------------------------------------------*/
void LEDRed_On (void) {
	// Save and disable interrupts (for atomic LED change)
	uint32_t m;
	m = __get_PRIMASK();
	__disable_irq();

  PTB->PCOR   = 1 << 22;   /* Red LED On*/
  PTB->PSOR   = 1 << 21;   /* Blue LED Off*/
  PTE->PSOR   = 1 << 26;   /* Green LED Off*/

	// Restore interrupts
	__set_PRIMASK(m);
}

/*----------------------------------------------------------------------------
  Function that turns on Green LED & all the others off
 *----------------------------------------------------------------------------*/
void LEDGreen_On (void) {
	// Save and disable interrupts (for atomic LED change)
	uint32_t m;
	m = __get_PRIMASK();
	__disable_irq();

  PTB->PSOR   = 1 << 21;   /* Blue LED Off*/
  PTE->PCOR   = 1 << 26;   /* Green LED On*/
  PTB->PSOR   = 1 << 22;   /* Red LED Off*/

	// Restore interrupts
	__set_PRIMASK(m);
}

/*----------------------------------------------------------------------------
  Function that turns on Blue LED & all the others off
 *----------------------------------------------------------------------------*/
void LEDBlue_On (void) {
	// Save and disable interrupts (for atomic LED change)
	uint32_t m;
	m = __get_PRIMASK();
	__disable_irq();

  PTE->PSOR   = 1 << 26;   /* Green LED Off*/
  PTB->PSOR   = 1 << 22;   /* Red LED Off*/
  PTB->PCOR   = 1 << 21;   /* Blue LED On*/

	// Restore interrupts
	__set_PRIMASK(m);
}

/*----------------------------------------------------------------------------
  Function that turns all LEDs off
 *----------------------------------------------------------------------------*/
void LED_Off (void) {
	// Save and disable interrupts (for atomic LED change)
	uint32_t m;
	m = __get_PRIMASK();
	__disable_irq();

  PTB->PSOR   = 1 << 22;   /* Green LED Off*/
  PTB->PSOR   = 1 << 21;   /* Red LED Off*/
  PTE->PSOR   = 1 << 26;   /* Blue LED Off*/

	// Restore interrupts
	__set_PRIMASK(m);
}