watchdog汇编程序

最新推荐文章于 2022-06-30 14:41:09 发布

sfz200809242719

最新推荐文章于 2022-06-30 14:41:09 发布

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分类专栏： ARM

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=========================================================
IRQ程序
注意:INTMSK的设置必须为32位，否则会出现异常
=========================================================

.equ SRCPND,0X4A000000

.equ INTMOD,0X4A000004

.equ INTMSK,0X4A000008

.equ INTPND,0x4A000010

.equ SUBPND,0X4A000018

.equ SUBMSK,0x4A00001C

.equ INTPND,0X4A000010

.equ SRCPND,0X4A000000

.equ WTCON ,0X53000000

.equ WTDAT ,0X53000004

.equ WTCNT ,0X53000008

begin:

stmfd sp!,{r0-r4,lr}

ldr r0,=INTMSK

.equ INTMSK_DATA,0xfffffdff

ldr r1,=INTMSK_DATA

ldr r2,[r0]

and r1,r1,r2

str r1,[r0]

ldr r0,=SUBMSK

.equ SUBMSK_DATA,0x0000

ldr r1,=SUBMSK_DATA

str r1,[r0]

ldr r0,=WTCNT

.equ WTCNT_DATA,0x8000

ldr r1,=WTCNT_DATA

str r1,[r0]

ldr r0,=WTCNT

.equ WTCNT_DATA,0x8000

ldr r1,=WTCNT_DATA

str r1,[r0]

.equ fenpin,((0x80)<<8)

.equ wtg_en,((1)<<5)

.equ time_select,((0)<<3)

.equ irq_en,((1)<<2)

.equ reset_en,0

.equ WTCON_DATA, (fenpin|wtg_en|time_select|irq_en|reset_en)

ldr r0,=WTCON

ldr r1,=WTCON_DATA

str r1,[r0]

ldmfd sp!,{r0-r4,pc}

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
VECTOR.S
中断向量
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

b reset

b undef

b soft

b resstop

b datstop

.word 0x00

.equ SUBSRCPND,0x4a000018

.equ SRCPND, 0x4a000000

.equ INTPND, 0x4a000010

.equ GPBCON,0x56000010

.equ GPBDAT, 0x56000014

.equ GPB5, (1<<(5*2))

.equ GPB6, (1<<(6*2))

.equ GPB7, (1<<(7*2))

.equ GPB8, (1<<(8*2))

.equ GPBVALUE, (GPB5|GPB6|GPB7|GPB8)

.equ GPB5_DATA, (0<<5)

.equ GPB6_DATA, (1<<6)

.equ GPB7_DATA, (1<<7)

.equ GPB8_DATA, (0<<8)

.equ GPB5_DATA_T, (1<<5)

.equ GPB6_DATA_T, (0<<6)

.equ GPB7_DATA_T, (0<<7)

.equ GPB8_DATA_T, (1<<8)

.equ GPB_DATA, (GPB5_DATA|GPB6_DATA|GPB7_DATA|GPB8_DATA)

.equ GPB_DATA_T, (GPB5_DATA_T|GPB6_DATA_T|GPB7_DATA_T|GPB8_DATA_T)

b irq

b firq

reset:

nop

undef:

nop

soft:

nop

resstop:

nop

datstop:

nop

irq:

clear_bit:

ldr sp,=0x32000000

sub lr,lr,#4

stmfd sp!,{r0-r12,r14}

ldr r0,=SUBSRCPND

ldr r1,[r0]

str r1,[r0]

ldr r0,=INTPND

ldr r1,=SRCPND

ldr r2,[r0]

str r2,[r1]

str r2,[r0]

feed_dog:

led:

ldr r0,=GPBCON

ldr r1,=GPBVALUE

str r1,[r0]

ldr r4,=0x31000000

ldr r0,[r4]

add r0,r0,#1

str r0,[r4]

and r0,r0,#0x00000001

cmp r0,#1

beq led_style_two

blt led_style_one

led_style_one:

ldr r0,=GPBDAT

ldr r1,=GPB_DATA

str r1,[r0]

b recover

led_style_two:

ldr r0,=GPBDAT

ldr r1,=GPB_DATA_T

str r1,[r0]

b recover

recover:

ldmfd sp!,{r0-r12,pc}^

fiq:
nop
nop
nop