MODULE main
	PUBLIC main
	SECTION `.text`:CODE:NOROOT(2)
	THUMB
main:


	//inicializaicja ledic
	ldr r0, =0x40023830     // AHB1 clocks
	ldr r1, =0x9     // GPIOD clock
	str r1,[r0]

	ldr r0, =0x40020C00     // GPIOD
	ldr r1, =0x55555555     // out (all)
	str r1, [r0, #0x00]      // MODER
	ldr r1, =0x0            // push-pull
	str r1, [r0, #0x04]      // OTYPER
	ldr r1, =0x0            // low speed
	str r1, [r0, #0x08]      // SPEEDR
	ldr r1, =0x0            // no pull
	str r1, [r0, #0x0C]      // PUPDR
	//konec inicializacije ledic

	//inicializacija gumba
	ldr r0, =0x40020000     // mode
	ldr r1, =0xA8000000     // in
	str r1,[r0]

	ldr r0, =0x4002000C     //
	ldr r1, =0x64000000     //
	str r1,[r0]
	//konec inicializacije gumba

     /*
        ldr r0,=0x40020C00
	ldr r1,=0x8000
        ldr r2,=0x4000
        ldr r3,=0x2000
        ldr r4,=0x1000

	strh r1,[r0,#0x18] //prizgemo led
        bl delay
        strh r2,[r0,#0x18] //prizgemo led
        bl delay
        strh r3,[r0,#0x18] //prizgemo led
        bl delay
        strh r4,[r0,#0x18] //prizgemo led
        bl delay

	ldr r0,=0x40020C00
        ldr r1,=0x1000
        ldr r2,=0x2000
        ldr r3,=0x4000
        ldr r4,=0x8000

	strh r1,[r0,#0x1A] //ugasnemo led
        bl delay
        strh r2,[r0,#0x1A] //ugasnemo led
        bl delay
        strh r3,[r0,#0x1A] //ugasnemo led
        bl delay
        strh r4,[r0,#0x1A] //ugasnemo led
        bl delay
        */

        //vstopna točka
        push {lr}
        push {r11}
        mov r11,sp

        ldr r0,=0x40020C00

        push {r6-r7}

        //bl gumb
       ldr r1,=0x40020010
loop2:
      ldr r2,[r1]
      ands r2, r2, #1
      it ne
      blne gumb
      b loop2

loop:   b loop

delay: ldr r5,=0x989680
delay_l:
        subs r5,r5,#1
        bne delay_l
        bx lr


gumb:
    bl delay
    ldr r6,=0xF000
    strh r6,[r0,#0x18]
    bl delay
    //ldr r6,=0xF000
    strh r6,[r0,#0x1A]
    bl delay
    bx lr

    END