arm 点灯实验
led3同理
代码：
.text
.global _start
_start:
/**********LED1点灯LED1----->PE10/
LED1_INIT:
/**************RCC章节*************/
@1.通过RCC_MP_AHB4ENSETR寄存器设置GPIOE时钟使能 0x50000A28[4] = 1
ldr r0,=0x50000A28
ldr r1,[r0]
orr r1,r1,#(0x1 << 4)
str r1,[r0]
/**************GPIO章节************/
@1.通过GPIOE_MODER寄存器设置PE10引脚为输出模式 0x50006000[21:20] = 01
ldr r0,=0x50006000
ldr r1,[r0]
and r1,r1,#(~(0x3<<20))
orr r1,r1,#(0x1<<20)
str r1,[r0]
@2.通过GPIOE_OTYPER寄存器设置PE10引脚为推晚输出模式 0x50006004[10] = 0
ldr r0,=0x50006004
ldr r1,[r0]
and r1,r1,#(~(0x1<<10))
str r1,[r0]
@3.通过GPIOE_OSPEEDR寄存器设置PE10引脚为低速输出模式 0x50006008[21:20] = 00
ldr r0,=0x50006008
ldr r1,[r0]
and r1,r1,#(~(0x3<<20))
str r1,[r0]
@4.通过GPIOE_PUPDR寄存器设置PE10引脚禁止上下拉电阻 0x5000600C[21:20] = 00
ldr r0,=0x5000600C
ldr r1,[r0]
and r1,r1,#(~(0x3<<20))
str r1,[r0]
LED2_INIT:
/**************RCC章节*************/
@1.通过RCC_MP_AHB4ENSETR寄存器设置GPIOE时钟使能 0x50000A28[4] = 1
ldr r0,=0x50000A28
ldr r1,[r0]
orr r1,r1,#(0x1 << 5)
str r1,[r0]
/**************GPIO章节************/
@1.通过GPIOF_MODER寄存器设置PF10引脚为输出模式 0x50007000[21:20] = 01
ldr r0,=0x50007000
ldr r1,[r0]
and r1,r1,#(~(0x3<<20))
orr r1,r1,#(0x1<<20)
str r1,[r0]
@2.通过GPIOF_OTYPER寄存器设置PF10引脚为推晚输出模式 0x50007004[10] = 0
ldr r0,=0x50007004
ldr r1,[r0]
and r1,r1,#(~(0x1<<10))
str r1,[r0]
@3.通过GPIOF_OSPEEDR寄存器设置PF10引脚为低速输出模式 0x50007008[21:20] = 00
ldr r0,=0x50007008
ldr r1,[r0]
and r1,r1,#(~(0x3<<20))
str r1,[r0]
@4.通过GPIOF_PUPDR寄存器设置PF10引脚禁止上下拉电阻 0x5000700C[21:20] = 00
ldr r0,=0x5000700C
ldr r1,[r0]
and r1,r1,#(~(0x3<<20))
LED3_INIT:
/**************RCC章节*************/
/* @1.通过RCC_MP_AHB4ENSETR寄存器设置GPIOE时钟使能 0x50000A28[4] = 1
ldr r0,=0x50000A28
ldr r1,[r0]
orr r1,r1,#(0x1 << 4)
str r1,[r0]
*/
/**************GPIO章节************/
@1.通过GPIOE_MODER寄存器设置PE8引脚为输出模式 0x50006000[17:16] = 01
ldr r0,=0x50006000
ldr r1,[r0]
and r1,r1,#(~(0x3<<16))
orr r1,r1,#(0x1<<16)
str r1,[r0]
@2.通过GPIOE_OTYPER寄存器设置PE8引脚为推晚输出模式 0x50006004[8] = 0
ldr r0,=0x50006004
ldr r1,[r0]
and r1,r1,#(~(0x1<<8))
str r1,[r0]
@3.通过GPIOE_OSPEEDR寄存器设置PE8引脚为低速输出模式 0x50006008[17:16] = 00
ldr r0,=0x50006008
ldr r1,[r0]
and r1,r1,#(~(0x3<<16))
str r1,[r0]
@4.通过GPIOE_PUPDR寄存器设置PE8引脚禁止上下拉电阻 0x5000600C[17:16] = 00
ldr r0,=0x5000600C
ldr r1,[r0]
and r1,r1,#(~(0x3<<16))
str r1,[r0]
loop:
bl LED1_ON
bl delay_1s
bl LED1_OFF
bl delay_1s
bl LED2_ON
bl delay_1s
bl LED2_OFF
bl delay_1s
bl LED3_ON
bl delay_1s
bl LED3_OFF
bl delay_1s
bl loop
LED1_ON:
@1.通过GPIOE_ODR寄存器设置PE10引脚输出高电平 0x50006014[10] = 1
ldr r0,=0x50006014
ldr r1,[r0]
orr r1,r1,#(0x1<<10)
str r1,[r0]
mov pc,lr
LED1_OFF:
@1.通过GPIOE_ODR寄存器设置PE10引脚输出低电平 0x50006014[10] = 0
ldr r0,=0x50006014
ldr r1,[r0]
and r1,r1,#(~(0x1<<10))
str r1,[r0]
mov pc,lr
LED2_ON:
@1.通过GPIOE_ODR寄存器设置PF10引脚输出高电平 0x50007014[10] = 1
ldr r0,=0x50007014
ldr r1,[r0]
orr r1,r1,#(0x1<<10)
str r1,[r0]
mov pc,lr
LED2_OFF:
@1.通过GPIOE_ODR寄存器设置PF10引脚输出低电平 0x50007014[10] = 0
ldr r0,=0x50007014
ldr r1,[r0]
and r1,r1,#(~(0x1<<10))
str r1,[r0]
mov pc,lr
LED3_ON:
@1.通过GPIOE_ODR寄存器设置PF8引脚输出高电平 0x50007014[8] = 1
ldr r0,=0x50006014
ldr r1,[r0]
orr r1,r1,#(0x1<<8)
str r1,[r0]
mov pc,lr
LED3_OFF:
@1.通过GPIOE_ODR寄存器设置PF8引脚输出低电平 0x50007014[8] = 0
ldr r0,=0x50006014
ldr r1,[r0]
and r1,r1,#(~(0x1<<8))
str r1,[r0]
mov pc,lr
@ 大概1s的延时函数
delay_1s:
mov r3, #0x10000000
mm:
cmp r3, #0
subne r3, r3, #1
bne mm
mov pc, lr
.end
