I am not using any start up code, Please find the below only assembly code and make sure me that, is it the right way to communicate to my GPIO on LPC2148, or any changes required for this, Some of the code is repeated since I am new to ARM assembly coding, so will take some time to understand all available instructions and usage. Thanks in advance for the help
Assembly code:
AREA ToggleTest, CODE, READONLY ENTRY
mov r0,#0x00000000 ldr r1,=0xE002C000 str r0,[r1]
mov r0,#0xFFFFFFFF ldr r1,=0xE0028008 str r0,[r1]
repeate mov r0,#0xFFFFFFFF ldr r1,=0xE0028004 str r0,[r1]
delay mov r3,#0x02 reasign mov r2,#0xFFFFFFFF dec sbc r2,r2,#01 cmp r2,#0 bne dec sbc r3,r3,#01 cmp r3,#0 bne reasign
mov r0,#0xFFFFFFFF ldr r1,=0xE002800C str r0,[r1]
delay1 mov r3,#0x02 reasgn1 mov r2,#0xFFFFFFFF dec1 sbc r2,r2,#01 cmp r2,#0 bne dec1 sbc r3,r3,#01 cmp r3,#0 bne reasgn1
B repeate
END
Please review posting instruction with respect to placing source code in messages.
http://www.keil.com/forum/tips.asp
Sorry, Thanks for the suggestion.
All Instructions are in the form of BOLD and labels are in the form of italic
MOV r0,#0x00000000 LDR r1,=0xE002C000 STR r0,[r1]
MOV r0,#0xFFFFFFFF LDR r1,=0xE0028008 STR r0,[r1]
repeate MOV r0,#0xFFFFFFFF LDR r1,=0xE0028004 STR r0,[r1]
delay MOV r3,#0x02 reasign MOV r2,#0xFFFFFFFF dcrmt SBC r2,r2,#01 CMP r2,#0 BNE dcrmt SBC r3,r3,#01 CMP r3,#0 BNE reasign
MOV r0,#0xFFFFFFFF LDR r1,=0xE002800C STR r0,[r1]
delay1 MOV r3,#0x02 reasgn1 MOV r2,#0xFFFFFFFF dcrmt1 SBC r2,r2,#01 CMP r2,#0 BNE dcrmt1 SBC r3,r3,#01 CMP r3,#0 BNE reasgn1
AREA ToggleTest, CODE, READONLY
ENTRY
MOV r0,#0x00000000
LDR r1,=0xE002C000
STR r0,[r1]
MOV r0,#0xFFFFFFFF
LDR r1,=0xE0028008
repeate MOV r0,#0xFFFFFFFF
LDR r1,=0xE0028004
delay MOV r3,#0x02 reasign MOV r2,#0xFFFFFFFF dcrmt SBC r2,r2,#01
CMP r2,#0
BNE dcrmt
SBC r3,r3,#01
CMP r3,#0
BNE reasign
LDR r1,=0xE002800C
delay1 MOV r3,#0x02 reasgn1 MOV r2,#0xFFFFFFFF dcrmt1 SBC r2,r2,#01
BNE dcrmt1
BNE reasgn1