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发表于 2018-2-14 00:07:36
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我这只有stm32f030f4p6，这个比较大还贵不适合。
SYSTICK定时器1秒中断一次，每次中断加1,结果写到FLASH，FLASH从0X8000C00到0X8004000循环写，重新开机在这个数组里找最大的，找到把地址和数据读出来，100小时时间到PA0-PA7输出高。
虽然程序很简单但是我第一次写这样的程序，不敢保证哦，反正你也不会用，这样程序调试容易擦坏片子，调出来也没什么用。
- @ stm32f030f4p6 asm
- @计数器
- @100小时，没测试
- @到时间GPIOA0-GPIOA7=高， 没测试。
- @ 没测试
- .thumb
- .syntax unified
- .section .data
- .equ STACKINIT, 0x20001000
- .equ jishu, 0x20000000
- .equ yaoxiedeflash, 0x20000004
- .section .text
- xiangliangbiao:
- .word STACKINIT
- .word _start + 1
- .word _nmi_handler + 1
- .word _hard_fault + 1
- .word 0
- .word 0
- .word 0
- .word 0
- .word 0
- .word 0
- .word 0
- .word _svc_handler +1
- .word 0
- .word 0
- .word _pendsv_handler +1
- .word _systickzhongduan + 1
- _start:
- ldr r0, = 0x40022000
- ldr r1, = 0x45670123
- str r1, [r0, # 0x04]
- ldr r1, = 0xcdef89ab
- str r1, [r0, # 0x04]
-
- ldr r0, = 0x8000800
- ldr r2, = 0xa55a
- ldrh r1, [r0]
- cmp r1, r2
- beq _zhaozuidadeshu
-
- ldr r2, = yaoxiedeflash
- ldr r0, = jishu
- ldr r1, = 0x8000c00
- movs r3, # 0
-
- str r3, [r0]
- str r1, [r2]
-
- ldr r0, = 0x40022000
- ldr r4, = 0xa55a
- ldr r7, = 0x8000800
- _xieflashmang:
- ldr r2, [r0, # 0x0c]
- lsls r2, r2, # 31
- bmi _xieflashmang
- movs r1, # 1
- str r1, [r0, # 0x10]
- strh r4, [r7]
-
- _xieflashmang1:
- ldr r2, [r0, # 0x0c]
- lsls r2, r2, # 31
- bmi _xieflashmang1
-
- _zhaozuidadeshu:
- ldr r0, = 0x8000c00
- ldr r1, = 0x3400
- ldr r6, = 0xffffffff
- movs r2, # 0
- mov r3, r2
- _zhaozuidade:
- ldr r4, [r0, r2]
- cmp r4, r3
- bls _zhaozuidade1
- mov r5, r2
- mov r3, r4
- _zhaozuidade1:
- adds r2, r2, # 4
- cmp r2, r1
- bne _zhaozuidade
- cmp r3, r6
- bne _bushiffff
- subs r5, r5, # 4
- mov r7, r5
- lsls r7, r7, # 31
- bpl _bushiffff
- movs r5, # 0
- _bushiffff:
- ldr r2, = yaoxiedeflash
- ldr r1, = jishu
- add r0, r0, r5
- str r0, [r2]
- ldr r3, [r0]
- str r3, [r1]
- _systick: @ systick定时器初始化
-
- ldr r0, = 0xe000e010
- ldr r1, = 10000000
- str r1, [r0, # 4]
- str r1, [r0, # 8]
- movs r1, # 0x07
- str r1, [r0]
- _waisheshizhong: @ 外设时钟
- ldr r0, = 0x40021000
- ldr r1, = 0x460005
- str r1, [r0, # 0x14]
- ldr r0, = 0x48000000
- ldr r1, = 0x28005555
- str r1, [r0]
- tingting:
- ldr r6, = 0xffffffff
- ldr r0, = jishu
- ldr r1, = 360000
- ldr r2, [r0]
- cmp r2, r6
- beq tingting
- cmp r2, r1
- bls tingting
- ldr r2, = 0x48000018
- ldr r3, = 0xe000e010
- movs r4, # 0
- movs r1, # 0xff
- str r1, [r2]
- str r4, [r3]
- b tingting
- _nmi_handler:
- bx lr
- _hard_fault:
- bx lr
- _svc_handler:
- bx lr
- _pendsv_handler:
- bx lr
- _systickzhongduan:
- ldr r0, = 0xe0000d04
- ldr r1, = 0x02000000
- str r1, [r0] @ 清除SYSTICK中断
- cpsid i
- ldr r0, = 0x40022000
- ldr r1, = jishu
- ldr r2, [r1]
- adds r2, r2, # 1
- str r2, [r1]
- ldr r7, = yaoxiedeflash
- ldr r6, = 0x8004000
- ldr r3, [r7]
- adds r3, r3, # 4
- cmp r3, r6
- bne _meichaochu
- ldr r4, = 0x8000c00
- mov r3, r4
-
- movs r5, # 14
- ldr r6, = 0x400
- _caflashmang:
- ldr r2, [r0, # 0x0c]
- lsls r2, r2, # 31
- bmi _caflashmang
- movs r1, # 2
- str r1, [r0, # 0x10]
- str r4, [r0, # 0x14]
- movs r1, # 0x42
- str r1, [r0, # 0x10]
- add r4, r4, r6
- subs r5, # 1
- bne _caflashmang
-
- _meichaochu:
- str r3, [r7]
- mov r7, r3
- mov r3, r2
-
- _flashmang1:
- ldr r2, [r0, # 0x0c]
- lsls r2, r2, # 31
- bmi _flashmang1
-
- movs r1, # 1
- str r1, [r0, # 0x10]
- strh r3, [r7]
- lsrs r3, r3, # 16
-
- _flashmang2:
- ldr r2, [r0, # 0x0c]
- lsls r2, r2, # 31
- bmi _flashmang2
-
- strh r3, [r7, # 0x02]
- _flashmang3:
- ldr r2, [r0, # 0x0c]
- lsls r2, r2, # 31
- bmi _flashmang3
- cpsie i
- bx lr
jishuqi.zip
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