Delay Library (SysTick) for LPC810

AAALPC810_testt14.c

#include "LPC8xx.h"

#include "delay_st.h"

int main(void) {
    LPC_SYSCON->SYSAHBCLKCTRL |= (1<<7);
    LPC_SWM->PINENABLE0 = 0xffffffbfUL;

    LPC_GPIO_PORT->DIR0 |= (1<<2);

    delay_init();

    while(1) {
    	LPC_GPIO_PORT->NOT0 |= (1<<2);
    	delay(500);
    }
    return 0 ;
}

delay_st.c

/*
 * delay_st.c
 *
 *  Created on: 2017/03/20
 *      Author: ha2zakura
 *              http://ktrikms.blog.jp/
 */

#include "LPC8xx.h"
#include "delay_st.h"

volatile uint32_t count = 0;

void SysTick_Handler(void)
{
	count++;
}

void delay_init(void)
{
    SysTick->LOAD = 6000 - 18;
    SysTick->VAL = 0;
}

void delay(uint32_t ms)
{
    SysTick->CTRL = (1 << 0) | (1 << 1);
    while(count != ms){}
    SysTick->CTRL = (0 << 0) | (0 << 1);
    count = 0;
}

delay_st.h

/*
 * delay_st.h
 *
 *  Created on: 2017/03/20
 *      Author: ha2zakura
 *              http://ktrikms.blog.jp/
 */

#ifndef DELAY_ST_H_
#define DELAY_ST_H_

#ifdef __cplusplus
extern "C" {
#endif

void SysTick_Handler(void);
void delay_init(void);
void delay(uint32_t ms);

#ifdef __cplusplus
}
#endif

#endif /* DELAY_ST_H_ */