Lab5

.global asm_main

asm_main:
 LDR R0, =0x41210000
 LDR R1, =0x41200000
 MOV R8, #0b10000000
 MOV R7, #0b10000000


press:
	LDR R6, [R1, #0]
	CMP R6, #1
	BNE off
	MOV R7, R8, LSR #1
	MOV R8, R7
	BEQ on

on:
	LDR R6, [R1, #0]
	STR R7, [R0, #0]
	CMP R6, #1
	BEQ on
	BNE off
off:
	MOV R7, #0b0000000
	STR R7, [R0, #0]
	B press
---------------------------------------------------------------------------------------------------------
.global asm_main

asm_main:
 LDR R0, =0x41210000
 LDR R1, =0x41200000
 MOV R8, #0b10000000
 MOV R7, #0b10000000

press:
	CMP R8, #1
	BEQ resetnum				;@ change flags, to check if R8 is going to become 0, then reset to Leftmost LED
	BL test
	MOV R7, R8, LSR #1
	MOV R8, R7
	BEQ on

on:
	STR R7, [R0, #0]
	BL test
	BEQ on
	BNE press



resetnum:
	 MOV R8, #0b100000000
	 B press


test:
	LDR R6, [R1, #0]
	CMP R6, #1
	BNE off
	MOV R15, R14

off:
	MOV R7, #0b0000000
	STR R7, [R0, #0]
	B test2

test2:
	LDR R6, [R1, #0]
	CMP R6, #1
	beq press
	bne off


--------------------------------------------------------------------------------------------------------------------------------------
.global asm_main

asm_main:
 LDR R0, =0x41210000
 LDR R1, =0x41200000
 MOV R8, #0b10000000
 MOV R7, #0b10000000


press:
	CMP R8, #1
    BEQ resetnum

    LDR R6, [R1, #0]
    CMP R6, #1
    BNE off
    MOV R7, R8, LSR #1
    MOV R8, R7
    BEQ on

on:
    LDR R6, [R1, #0]
    STR R7, [R0, #0]
    CMP R6, #1
    BEQ on
    BNE off
off:
    MOV R7, #0b0000000
    STR R7, [R0, #0]
    B press

resetnum:
    MOV R8, #0b100000000
    B press

------------------------------------------------------------------------------------------------------------------------------------
.global asm_main

asm_main:
 LDR R0, =0x41210000
 LDR R1, =0x41200000
 MOV R8, #0b10000000
 MOV R7, #0b10000000
 LDR R9, =#100000
 MOV R5, #0


press:
	CMP R8, #1
    BEQ resetnum

	LDR R6, [R1,#0]
    CMP R6, #1
    BNE off
    MOV R7, R8, LSR #1
    MOV R8, R7
    BEQ on

on:
	BL debounce
    LDR R6, [R1, #0]
    STR R7, [R0, #0]
    CMP R6, #1
    BEQ on
    BNE off
off:

    MOV R7, #0b0000000
    STR R7, [R0, #0]

    BL debounce
    LDR R6, [R1, #0]
    CMP R6, #1

    BNE off
    BEQ press

resetnum:
    MOV R8, #0b100000000
    B press


debounce:
	LDR R6, [R1, #0]
	ADD R5,R5,R6
	CMP R9, R5
	BNE debounce
	MOV R5, #0
	MOV R15, R14

----------------------------------------------------------------------------------------------------
.global asm_main
.align 4
memory: .space 2000000
.align 4

asm_main:

  LDR R3, =memory
  MVN R4, #0
  STR R4, [R3]
  PUSH {R0}
  NOP
  NOP
  NOP

 LDR R0, =0x41210000		;@ LEDS
 LDR R1, =0x41200000		;@ BUTTONS
 LDR R2, =0x41220000		;@ SWITCHES
 MOV R8, #0b10000000
 MOV R7, #0b10000000
 LDR R9, =#131072

press:
	CMP R8, #1
    BEQ resetnum
    MOV R7, R8, LSR #1
    MOV R8, R7
    LDR R10, [R2,#0]
    MOV R5, R8
    ANDS R5, R5, R10
    BEQ press
    LDR R6, [R1,#0]
    CMP R6, #0
    BEQ off
    BNE debounce

on:
    LDR R6, [R1, #0]
    STR R7, [R0, #0]
    CMP R6, #0
    BNE debounce
    BEQ off
off:

    MOV R7, #0b0000000
    STR R7, [R0, #0]
    LDR R6, [R1, #0]
    CMP R6, #0
    BEQ off
    BNE press

resetnum:
    MOV R8, #0b100000000
    B press

debounce:
	SUBS R9, R9, #1
	BNE debounce
	LDR R9, =#131072
	BEQ on