Thursday, 31 October 2013
ARM (LPCXXXX) Assembly Program for LED Blinking
@;===========================================================================
@; LED Blinking program
@;
@; Modified by GAURAV
VERMA
@;
@;===========================================================================
AREA
PROGRAM, CODE, READONLY
ENTRY
PINSEL0 EQU 0xE002C000
PINSEL1 EQU 0xE002C004
IOPIN EQU 0xE0028000
IODIR EQU 0xE0028008
IOSET EQU 0xE0028004
IOCLR EQU 0xE002800C
ldr r1,=PINSEL0 ;
PINSEL0 controls pin 0-15,@; PINSEL1 controls pin 16-31
ldr
r2,=0x00000000 ;default GPIO
function 00
str r2, [r1]
ldr r1,=IODIR
ldr r2,=0xFFFFFFFF ; 0-INPUT 1-OUTPUT 0:31 (12 -LED)
str r2, [r1]
;
ON LED (GPIO) (GPIO LOW-ON)
BACK ldr r0,=IOCLR
ldr
r1,=0xFFFFFFFF ; CLR ALL
str
r1, [r0]
BL
WAIT
;
OFF LED (GPIO) (GPIO HIGH-OFF)
ldr
r0,=IOSET
ldr r1,=0xFFFFFFFF ; SET ALL
str r1, [r0]
BL
WAIT
BAL
BACK
WAIT MOV r4, #0x00100000
BACK1 nop
SUBS r4, r4, #1
bne BACK1
bx
R14
END
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