#include <stdint.h>
#include "LPC11xx.h"
#include "core_cm0.h"

void DelayTick(uint32_t delay)
{
    while (delay) {
        while ((SysTick->CTRL&(1<<SysTick_CTRL_COUNTFLAG_Pos))==0);
        SysTick->CTRL = 0
            | (1 << SysTick_CTRL_ENABLE_Pos)    // Enable timer
            | (0 << SysTick_CTRL_TICKINT_Pos)   // Disable SysTick interrupts
            | (0 << SysTick_CTRL_CLKSOURCE_Pos); // System clock/2
        delay--;
    }
}

int main (void)
{
    LPC_GPIO0->DIR=1<<7;

    // setup SysTick timer
    SysTick->LOAD = 48000000 / 100-1;
    SysTick->VAL = 0;   // reset counter
    SysTick->CTRL = 0
        | (1 << SysTick_CTRL_ENABLE_Pos)    // Enable timer
        | (0 << SysTick_CTRL_TICKINT_Pos)   // Disable SysTick interrupts
        | (0 << SysTick_CTRL_CLKSOURCE_Pos) // System clock/2
;
    
    while (1) {
        LPC_GPIO0->DATA&=~(1<<7);
        DelayTick(100);
        LPC_GPIO0->DATA|=(1<<7);
        DelayTick(5);

    }
}

RUN_FROM_FLASH = 1

RUN_FROM_FLASH = 0