首页 > 专利查询

Keil_5汇编循环实现求和

汇编语⾔循环结构实例：

实现1+2+…+100（两种算法：加法和减法）

1、加法

AREA MYDATA, DATA ；定义⼀个数据段，也可以不定义

AREA MYCODE, CODE ；定义⼀个代码段，⾄少定义⼀个，AREA不能顶格

ENTRY ;⼊⼝

EXPORT __main ；声明全局标号，如果没有会报错，提⽰标号未声明

__main

MOV R0,#1 ；赋值，i=1

MOV R1,#0 ;s=0

LOOP ; 循环体

ADD R1,R1,R0 ;s=s+1

ADDS R0,R0,#1 ;i++

CMP R0,#101 ;⽐较i和101，如果是100会少加100

BNE LOOP ；不相等就重复循环

LDR R2,=HE ；把HE表⽰的值加载到寄存器中，名称HE可⾃⾏定义

STR R1,[R2] ；把s写⼊以R2为地址的寄存器中，最后的结果保存在R2中

水稻田HE ;

DCD 0 ；分配连续的存储空间并初始化为0

DEADLOOP ;

B DEADLOOP ；死循环，⽬的在于观察结果

END ;

2、减法

AREA MYDATA, DATA

AREA MYCODE, CODE

ENTRY

EXPORT __main

__main

MOV R0,#100

MOV R1,#0

LOOP

ADD R1,R1,R0

SUBS R0,R0,#1

CMP R0,#0

BNE LOOP

LDR R2,=HE

STR R1,[R2]

DCD 0

DEADLOOP

B DEADLOOP

END

3、这⾥提供⼀种使⽤⾃定义简单启动代码实现求和的操作：

建⼯程的时候由于是⾃⼰写启动代码，不⽤把库⾥的启动函数包含进来，不然会报错，就是多个启动函数造成的。

STACK_TOP EQU 0x00002000

AREA reset,CODE

DCD STACK_TOP

DCD Start

ENTRY

Start

MOV r0, #100

MOV r1, #0

loop

ADD r1, r0

SUBS r0, #1

BNE loop

deadloop

B deadloop

END

4、下⾯这是直接使⽤系统中的启动函数：

STACK_TOP EQU 0X20002000

；堆栈初始化

Stack_Size EQU 0x00000400

AREA STACK, NOINIT, READWRITE, ALIGN=3

Stack_Mem SPACE Stack_Size

__initial_sp

Heap_Size EQU 0x00000200

AREA HEAP, NOINIT, READWRITE, ALIGN=3

__heap_base

Heap_Mem SPACE Heap_Size

__heap_limit

；堆栈8字节对齐

PRESERVE8

；使⽤THUMB指令

THUMB

；复位向量

AREA RESET,CODE,READONLY

__Vectors DCD __initial_sp ; Top of Stack

DCD Reset_Handler ; Reset Handler

DCD NMI_Handler ; NMI Handler

DCD HardFault_Handler ; Hard Fault Handler

DCD MemManage_Handler ; MPU Fault Handler

DCD BusFault_Handler ; Bus Fault Handler

DCD UsageFault_Handler ; Usage Fault Handler

DCD 0 ; Reserved

DCD SVC_Handler ; SVCall Handler

DCD DebugMon_Handler ; Debug Monitor Handler

DCD 0 ; Reserved

DCD PendSV_Handler ; PendSV Handler

DCD SysTick_Handler ; SysTick Handler

; External Interrupts

DCD WWDG_IRQHandler ; Window Watchdog

DCD PVD_IRQHandler ; PVD through EXTI Line detect DCD TAMPER_IRQHandler ; Tamper

DCD RTC_IRQHandler ; RTC

DCD FLASH_IRQHandler ; Flash

DCD RCC_IRQHandler ; RCC

DCD EXTI0_IRQHandler ; EXTI Line 0

DCD EXTI1_IRQHandler ; EXTI Line 1

DCD EXTI2_IRQHandler ; EXTI Line 2

DCD EXTI3_IRQHandler ; EXTI Line 3

DCD EXTI4_IRQHandler ; EXTI Line 4

DCD DMA1_Channel1_IRQHandler ; DMA1 Channel 1

DCD DMA1_Channel2_IRQHandler ; DMA1 Channel 2

DCD DMA1_Channel3_IRQHandler ; DMA1 Channel 3

聚氨酯生产工艺DCD DMA1_Channel4_IRQHandler ; DMA1 Channel 4

DCD DMA1_Channel5_IRQHandler ; DMA1 Channel 5

DCD DMA1_Channel6_IRQHandler ; DMA1 Channel 6

DCD DMA1_Channel7_IRQHandler ; DMA1 Channel 7

DCD ADC1_2_IRQHandler ; ADC1 & ADC2

DCD USB_HP_CAN1_TX_IRQHandler ; USB High Priority or CAN1 TX DCD USB_LP_CAN1_RX0_IRQHandler ; USB Low Priority or CAN1 RX0 DCD CAN1_RX1_IRQHandler ; CAN1 RX1

DCD CAN1_SCE_IRQHandler ; CAN1 SCE

DCD EXTI9_5_IRQHandler ; EXTI Line 9..5

DCD TIM1_BRK_IRQHandler ; TIM1 Break

DCD TIM1_UP_IRQHandler ; TIM1 Update

DCD TIM1_TRG_COM_IRQHandler ; TIM1 Trigger and Commutation DCD TIM1_CC_IRQHandler ; TIM1 Capture Compare

DCD TIM2_IRQHandler ; TIM2

DCD TIM3_IRQHandler ; TIM3

DCD TIM4_IRQHandler ; TIM4

投票箱制作

DCD I2C1_EV_IRQHandler ; I2C1 Event

DCD I2C1_ER_IRQHandler ; I2C1 Error

DCD I2C2_EV_IRQHandler ; I2C2 Event

DCD I2C2_ER_IRQHandler ; I2C2 Error

DCD SPI1_IRQHandler ; SPI1

DCD SPI2_IRQHandler ; SPI2

DCD USART1_IRQHandler ; USART1

DCD USART2_IRQHandler ; USART2

DCD USART3_IRQHandler ; USART3

DCD EXTI15_10_IRQHandler ; EXTI Line 15..10

DCD RTCAlarm_IRQHandler ; RTC Alarm through EXTI Line

DCD USBWakeUp_IRQHandler ; USB Wakeup from suspend

DCD TIM8_BRK_IRQHandler ; TIM8 Break

DCD TIM8_UP_IRQHandler ; TIM8 Update

DCD TIM8_TRG_COM_IRQHandler ; TIM8 Trigger and Commutation DCD TIM8_CC_IRQHandler ; TIM8 Capture Compare

DCD ADC3_IRQHandler ; ADC3

DCD FSMC_IRQHandler ; FSMC

DCD SDIO_IRQHandler ; SDIO

DCD TIM5_IRQHandler ; TIM5

DCD SPI3_IRQHandler ; SPI3

DCD UART4_IRQHandler ; UART4

DCD UART5_IRQHandler ; UART5

DCD TIM6_IRQHandler ; TIM6

DCD TIM7_IRQHandler ; TIM7

DCD DMA2_Channel1_IRQHandler ; DMA2 Channel1

DCD DMA2_Channel2_IRQHandler ; DMA2 Channel2

DCD DMA2_Channel3_IRQHandler ; DMA2 Channel3

DCD DMA2_Channel4_5_IRQHandler ; DMA2 Channel4 & Channel5

__Vectors_End

AREA |.text|, CODE, READONLY

ENTRY ；指⽰开始执⾏

Reset_Handler

; 初始化寄存器

MOV r0, #100 ; 加载循环变量的初值

MOV r1, #0 ; 初始化运算结果的值

; 计算 10+9+8+...+1

loop

ADD r1, r0 ; R1 += R0

SUBS r0, #1 ; R0⾃减，并且根据结果更新标志（有”S”后缀）

BNE loop ; if (R0!=0) goto loop; B+标志位NE

; 现在，运算结果在R1中

deadloop

B deadloop ; ⼯作完成后，进⼊⽆穷循环

；异常

NMI_Handler PROC

EXPORT NMI_Handler [WEAK]

B .

ENDP

HardFault_Handler PROC

EXPORT HardFault_Handler [WEAK]

B .

ENDP

MemManage_Handler PROC

EXPORT MemManage_Handler [WEAK]

B .

ENDP

BusFault_Handler PROC

EXPORT BusFault_Handler [WEAK]

B .

ENDP

UsageFault_Handler PROC

EXPORT UsageFault_Handler [WEAK]

B .

ENDP

SVC_Handler PROC

EXPORT SVC_Handler [WEAK]

B .

ENDP

DebugMon_Handler PROC

EXPORT DebugMon_Handler [WEAK]

B .

ENDP

PendSV_Handler PROC

EXPORT PendSV_Handler [WEAK]

B .

ENDP

SysTick_Handler PROC

EXPORT SysTick_Handler [WEAK]

B .

ENDP

；中断

Default_Handler PROC

EXPORT WWDG_IRQHandler [WEAK]

EXPORT PVD_IRQHandler [WEAK]

EXPORT TAMPER_IRQHandler [WEAK]

EXPORT RTC_IRQHandler [WEAK]

EXPORT FLASH_IRQHandler [WEAK]

EXPORT RCC_IRQHandler [WEAK]

EXPORT EXTI0_IRQHandler [WEAK]

EXPORT EXTI1_IRQHandler [WEAK]

EXPORT EXTI2_IRQHandler [WEAK]

EXPORT EXTI3_IRQHandler [WEAK]

EXPORT EXTI4_IRQHandler [WEAK]

EXPORT DMA1_Channel1_IRQHandler [WEAK] EXPORT DMA1_Channel2_IRQHandler [WEAK] EXPORT DMA1_Channel3_IRQHandler [WEAK] EXPORT DMA1_Channel4_IRQHandler [WEAK] EXPORT DMA1_Channel5_IRQHandler [WEAK] EXPORT DMA1_Channel6_IRQHandler [WEAK]

EXPORT DMA1_Channel7_IRQHandler [WEAK] EXPORT ADC1_2_IRQHandler [WEAK]

EXPORT USB_HP_CAN1_TX_IRQHandler [WEAK] EXPORT USB_LP_CAN1_RX0_IRQHandler [WEAK] EXPORT CAN1_RX1_IRQHandler [WEAK]

EXPORT CAN1_SCE_IRQHandler [WEAK]

EXPORT EXTI9_5_IRQHandler [WEAK]

EXPORT TIM1_BRK_IRQHandler [WEAK]

EXPORT TIM1_UP_IRQHandler [WEAK]

EXPORT TIM1_TRG_COM_IRQHandler [WEAK] EXPORT TIM1_CC_IRQHandler [WEAK]

EXPORT TIM2_IRQHandler [WEAK]

EXPORT TIM3_IRQHandler [WEAK]

EXPORT TIM4_IRQHandler [WEAK]

EXPORT I2C1_EV_IRQHandler [WEAK]

EXPORT I2C1_ER_IRQHandler [WEAK]

EXPORT I2C2_EV_IRQHandler [WEAK]

EXPORT I2C2_ER_IRQHandler [WEAK]

EXPORT SPI1_IRQHandler [WEAK]

EXPORT SPI2_IRQHandler [WEAK]

EXPORT USART1_IRQHandler [WEAK]

EXPORT USART2_IRQHandler [WEAK]

EXPORT USART3_IRQHandler [WEAK]

EXPORT EXTI15_10_IRQHandler [WEAK]

EXPORT RTCAlarm_IRQHandler [WEAK]

EXPORT USBWakeUp_IRQHandler [WEAK] EXPORT TIM8_BRK_IRQHandler [WEAK]

彩

EXPORT TIM8_UP_IRQHandler [WEAK]

EXPORT TIM8_TRG_COM_IRQHandler [WEAK] EXPORT TIM8_CC_IRQHandler [WEAK]

EXPORT ADC3_IRQHandler [WEAK]

EXPORT FSMC_IRQHandler [WEAK]

EXPORT SDIO_IRQHandler [WEAK]

EXPORT TIM5_IRQHandler [WEAK]

EXPORT SPI3_IRQHandler [WEAK]

EXPORT UART4_IRQHandler [WEAK]

EXPORT UART5_IRQHandler [WEAK]

EXPORT TIM6_IRQHandler [WEAK]

EXPORT TIM7_IRQHandler [WEAK]

EXPORT DMA2_Channel1_IRQHandler [WEAK] EXPORT DMA2_Channel2_IRQHandler [WEAK] EXPORT DMA2_Channel3_IRQHandler [WEAK] EXPORT DMA2_Channel4_5_IRQHandler [WEAK]

WWDG_IRQHandler

PVD_IRQHandler

TAMPER_IRQHandler

RTC_IRQHandler

FLASH_IRQHandler废棉

RCC_IRQHandler

EXTI0_IRQHandler

EXTI1_IRQHandler

EXTI2_IRQHandler

EXTI3_IRQHandler

EXTI4_IRQHandler

DMA1_Channel1_IRQHandler

DMA1_Channel2_IRQHandler

DMA1_Channel3_IRQHandler

DMA1_Channel4_IRQHandler

DMA1_Channel5_IRQHandler

DMA1_Channel6_IRQHandler

DMA1_Channel7_IRQHandler

ADC1_2_IRQHandler

USB_HP_CAN1_TX_IRQHandler

USB_LP_CAN1_RX0_IRQHandler

CAN1_RX1_IRQHandler

CAN1_SCE_IRQHandler

EXTI9_5_IRQHandler

TIM1_BRK_IRQHandler

TIM1_UP_IRQHandler

TIM1_TRG_COM_IRQHandler

眼镜显示器

TIM1_CC_IRQHandler

TIM2_IRQHandler

TIM3_IRQHandler

本文发布于:2024-09-22 04:18:04，感谢您对本站的认可！

本文链接：https://www.17tex.com/tex/4/101831.html

上一篇：k8存储使用介绍

下一篇：2013世界汽车模特大赛(大中华区)策划案(简体)

标签：启动结果循环实现函数

留言与评论（共有 0 条评论）