- .syntax unified
- .arch armv7-a
- .align 4
- .arm
- .text
- movw r6, # 0x4000
- movt r6, # 0x8000 [url=home.php?mod=space&uid=72445]@[/url] r6 = 0x80004000
- mov r0, r6 [url=home.php?mod=space&uid=72445]@[/url] r0 读 r6
- mov r4, # 1000 [url=home.php?mod=space&uid=72445]@[/url] 10K内存
- mov r5, # 0 @ 10K内存写0
- _nei_cun_qing_ling: @ 循环写0函数
- str r5, [r6], # 0x04 @ R5= 0 写到R6的地址然后地址加4
- subs r4, r4, # 1 @ 执行一次计数减1
- bne _nei_cun_qing_ling @ 不等与0循环
- movw r1, # 0x4811
- movt r1, # 0x8000 @ r1 = 0x80004811 第一级描述符
- add r0, r0, # 0x400 @ 0x80004000 加 0x400 = 0x80004400
- str r1, [r0] @ 第一级描述符写到0x80004400
- movw r1, # 0xc453
- movt r1, # 0x020a @ r1 = 0x20ac453 第二级描述符
- add r0, r0, # 0x400 @ 0x80004400 加 0x400 = 0x80004800
- str r1, [r0] @ 第二级描述符写到0x80004800
- movw r0, # 0x406a
- movt r0, # 0x8000 @ r0= 0x8000406a
- mcr p15, 0, r0, c2, c0, 0 @ r0写到TTBR0
- mcr p15, 0, r0, c2, c0, 1 @ r0写到TTBR1
- movw r0, # 0x3C7D
- movt r0, # 0x10C5 @ r0 = 0x10c53c7d
- mcr p15, 0, r0, c1, c0, 0 @ 打开MMU
- movw r0, # 0x0000
- movt r0, # 0x1000 @ GPIO5_DR虚拟地址= 0x10000000
- _led_kai_guan: @ LED闪烁程序
- mov r1, # 0x10 @ IO4
- str r1, [r0, # 0x04] @ IO4配置为输出
- str r1, [r0] @ IO4开
- mov r3, # 0x00 @
- movw r2, # 0xffff
- movt r2, # 0x03ff @ R2 = 延时数0x3ffffff
- _led_xun_huan1: @ IO开延时
- subs r2, r2, # 1 @ R2减1
- bne _led_xun_huan1 @ 开延时循环
- str r3, [r0] @ 延时结束关闭IO4
- movw r2, # 0xffff
- movt r2, # 0x03ff @ 延时数重新写入R2
- _led_xun_huan2: @ IO关延时
- subs r2, r2, # 1 @ R2减1
- bne _led_xun_huan2 @ 关延时循环
- b _led_kai_guan @ 跳转到LED函数
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