/*
 * delay.c
 *
 * Created on: Dec 10, 2021
 * Author: Trevor Barnes
 */

#include <inttypes.h>
#include "delay.h"  //include declaration header file

void delay_1ms(uint32_t n){

	// 1ms = 16,000 ticks
	for (int i = n ; i > 0 ; i--) {
		// Clear value register
		*STK_VAL = 0x0000;
		// Store 16,000 in STK_LOAD
		*STK_LOAD = 16000;
		// Enable clock, no prescaler, no interrupt
		*STK_CTRL |= CLKSOURCE;
		*STK_CTRL |= EN;
		// Loop n times: Wait for countflag high
		int flag;
		do {
			flag = ((*STK_CTRL & (1<<16))>>16);
		} while (flag != 1);
	}
}