;------------------------------------------------------------------
Stack_Size EQU 0x00000400
AREA STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem SPACE Stack_Size
;------------------------------------------------------------------
__initial_sp
;------------------------------------------------------------------
Heap_Size EQU 0x00000000
AREA HEAP, NOINIT, READWRITE, ALIGN=3
;------------------------------------------------------------------
__heap_base
Heap_Mem SPACE Heap_Size
;------------------------------------------------------------------
__heap_limit
PRESERVE8
THUMB
;------------------------------------------------------------------
; Vector Table Mapped to Address 0 at Reset
; 重置时映射到地址0的矢量表
;------------------------------------------------------------------
AREA RESET, DATA, READONLY
EXPORT __vector_table
EXPORT __vectors_End
EXPORT __vectors_Size
;------------------------------------------------------------------
__vector_table DCD __initial_sp ; Top of Stack
DCD Reset_Handler ; Reset Handler
DCD NMI_Handler ; NMI Handler
DCD HardFault_Handler ; Hard Fault Handler
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD SVC_Handler ; SVCall Handler
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD PendSV_Handler ; PendSV Handler
DCD SysTick_Handler ; SysTick Handler
;------------------------------------------------------------------
; Interrupts 中断
;------------------------------------------------------------------
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD FLASH_IRQHandler ; FLASH
DCD RCC_IRQHandler ; RCC
DCD EXTI0_1_IRQHandler ; EXTI Line 0 & 1
DCD EXTI2_3_IRQHandler ; EXTI Line 2 & 3
DCD EXTI4_7_IRQHandler ; EXTI Line 4 to 7
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD ADC_COMP_IRQHandler ; ADC & COMP1/2
;------------------------------------------------------------------
; TIM1 Break, Update, Trigger and COM Event
; TIM1中断、更新、触发和COM事件
;------------------------------------------------------------------
DCD TIM1_BRK_UP_TRG_COM_IRQHandler
DCD TIM1_CC_IRQHandler ; TIM1 Capture Compare
DCD TIM3_IRQHandler ; TIM3
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD LPTIM1_IRQHandler ; LPTIM1
DCD I2C1_IRQHandler ; I2C1
DCD 0 ; Reserved
DCD SPI1_IRQHandler ; SPI1
DCD 0 ; Reserved
DCD UART1_IRQHandler ; UART1
DCD UART2_IRQHandler ; UART2
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
;------------------------------------------------------------------
__vectors_End
;------------------------------------------------------------------
__vectors_Size EQU __vectors_End - __vector_table
;------------------------------------------------------------------
AREA |.text|, CODE, READONLY
Reset_Handler PROC
EXPORT Reset_Handler [WEAK]
;IMPORT SystemInit
IMPORT main_REST
;LDR R0, =SystemInit ;
;BX R0 ;
NOP
LDR R0, =main_REST ;
BX R0 ;
ENDP
;------------------------------------------------------------------
; Dummy Exception Handlers (infinite loops which can be modified)
;伪异常处理程序(可以修改的无限循环)
;------------------------------------------------------------------
NMI_Handler PROC
EXPORT NMI_Handler [WEAK]
B .
ENDP
;------------------------------------------------------------------
HardFault_Handler\
PROC
EXPORT HardFault_Handler [WEAK]
B .
ENDP
;------------------------------------------------------------------
SVC_Handler PROC
EXPORT SVC_Handler [WEAK]
B .
ENDP
;------------------------------------------------------------------
PendSV_Handler PROC
EXPORT PendSV_Handler [WEAK]
B .
ENDP
;------------------------------------------------------------------
SysTick_Handler PROC
EXPORT SysTick_Handler [WEAK]
B .
ENDP
;------------------------------------------------------------------
Default_Handler PROC
EXPORT FLASH_IRQHandler [WEAK]
EXPORT RCC_IRQHandler [WEAK]
EXPORT EXTI0_1_IRQHandler [WEAK]
EXPORT EXTI2_3_IRQHandler [WEAK]
EXPORT EXTI4_7_IRQHandler [WEAK]
EXPORT ADC_COMP_IRQHandler [WEAK]
EXPORT TIM1_BRK_UP_TRG_COM_IRQHandler [WEAK]
EXPORT TIM1_CC_IRQHandler [WEAK]
EXPORT TIM3_IRQHandler [WEAK]
EXPORT LPTIM1_IRQHandler [WEAK]
EXPORT I2C1_IRQHandler [WEAK]
EXPORT SPI1_IRQHandler [WEAK]
EXPORT UART1_IRQHandler [WEAK]
EXPORT UART2_IRQHandler [WEAK]
;------------------------------------------------------------------
FLASH_IRQHandler
RCC_IRQHandler
EXTI0_1_IRQHandler
EXTI2_3_IRQHandler
EXTI4_7_IRQHandler
ADC_COMP_IRQHandler
TIM1_BRK_UP_TRG_COM_IRQHandler
TIM1_CC_IRQHandler
TIM3_IRQHandler
LPTIM1_IRQHandler
I2C1_IRQHandler
SPI1_IRQHandler
UART1_IRQHandler
UART2_IRQHandler
B .
ENDP
;------------------------------------------------------------------
ALIGN
;------------------------------------------------------------------
RCC_INIT PROC
EXPORT RCC_INIT
;------------------------------------------------------------------
PUSH {R0-R7, LR}
;外部高速时钟时能 RCC->CR |= Bit16
; LDR R0, =RCC_CSR1
LDR R1, [R0]
; ORR R1, #Bit16
STR R1, [R0]
;检验外部时钟是否就绪
;------------------------------------------------------------------
RCC_CLK_NOTOK LDR R1, [R0]
; ANDS R1, #Bit17
BEQ RCC_CLK_NOTOK
LDR R1, [R0]
; LDR R0, =Bit17
; AND R1,R2
; ORR R1, #Bit17
STR R1, [R0]
;------------------------------------------------------------------
;FLASH缓冲区及访问速度配置
; LDR R0, =FLASH_ACR
; MOV R1, #0X00000032
STR R1, [R0]
;------------------------------------------------------------------
;设置系统时钟倍频
; LDR R0, =RCC_CFGR
LDR R1, [R0]
;HCLK 2分频
; ORR R1, #Bit10
;9倍频[21:18]-->0111
; ORR R1, #Bit18
; ORR R1, #Bit19
; ORR R1, #Bit20
;设置ADC的预分频为PCLK2的4分频
; ORR R1, #Bit14
;设置HSE为PLL输入时钟源
; ORR R1, #Bit16
STR R1, [R0]
;------------------------------------------------------------------
;开启倍频
; LDR R0, =RCC_CR
LDR R1, [R0]
; ORR R1, #Bit24
STR R1, [R0]
;------------------------------------------------------------------
;等待倍频生效
RCC_PLL_NOTOK LDR R1, [R0]
; ANDS R1, #Bit25
BEQ RCC_PLL_NOTOK
;------------------------------------------------------------------
;设置PLL为当前系统时钟
; LDR R0, =RCC_CFGR
LDR R1, [R0]
; ORR R1, #Bit1
STR R1, [R0]
;------------------------------------------------------------------
;验证系统时钟状态是否切换为PLL
; MOV R2, #0X02
RCC_PLL_NOTRDY LDR R1, [R0]
; LSR R1, R1, #2
; AND R1, #0X03
CMP R1, R2
BNE RCC_PLL_NOTRDY
POP {R0-R7, PC}
ENDP
;------------------------------------------------------------------
; User Initial Stack & Heap
;------------------------------------------------------------------
IF :DEF:__MICROLIB
EXPORT __initial_sp
EXPORT __heap_base
EXPORT __heap_limit
ELSE
IMPORT __use_two_region_memory
EXPORT __user_initial_stackheap
;------------------------------------------------------------------
__user_initial_stackheap PROC
LDR R0, = Heap_Mem
LDR R1, =(Stack_Mem + Stack_Size)
LDR R2, = (Heap_Mem + Heap_Size)
LDR R3, = Stack_Mem
BX LR
ENDP
;------------------------------------------------------------------
ALIGN
;------------------------------------------------------------------
ENDIF
;------------------------------------------------------------------
END
Cortex-M0 汇编程序
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