STM32工程中出现 error: A1163E: Unknown opcode R0, , expecting opcode or Macro错误分析及处理

最近测试以前的一个程序，一般都是打开以前写的程序修改参数直接测试

但是发现以前的编译后出现错误。

奇怪了，以前的出现都是调试好了的啊，一般都是没有错误的，迅速找问题

跳转到错误代码行

代码区域

 Heap_Size       EQU     0x00000000

                 AREA    HEAP, NOINIT, READWRITE, ALIGN=
 __heap_base
 Heap_Mem        SPACE   Heap_Size
 __heap_limit

                 PRESERVE8
                 THUMB      ;指定为THUMB代码集

 ; Vector Table Mapped to Address  at Reset
                 AREA    RESET, DATA, READONLY       ;伪指令指定一下数据将放到程序存储区的开始。
                 EXPORT  __Vectors
                 EXPORT  __Vectors_End
                 EXPORT  __Vectors_Size

 __Vectors       DCD     __initial_spTop           ; Top of Stack    栈首地址值（注意：CM3的栈指针是递减的）
                 DCD     Reset_Handler             ; Reset Handler   复位函数的入口地址
                 DCD     NMI_Handler               ; NMI Handler     以下为响应的中断函数入口地址
                 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                              ; Reserved
                 DCD                              ; Reserved
                 DCD                              ; Reserved
                 DCD                              ; Reserved
                 DCD     SVC_Handler               ; SVCall Handler
                 DCD     DebugMon_Handler          ; Debug Monitor Handler
                 DCD                              ; Reserved
                 DCD     PendSV_Handler            ; PendSV Handler
                 DCD     SysTick_Handler           ; SysTick Handler

                 ; External Interrupts                                           以下为STM32定义的中断入口地址也是CM3定义的外部中断（非CM3内核中断）入口地址
                 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
                 DCD     EXTI1_IRQHandler          ; EXTI Line
                 DCD     EXTI2_IRQHandler          ; EXTI Line
                 DCD     EXTI3_IRQHandler          ; EXTI Line
                 DCD     EXTI4_IRQHandler          ; EXTI Line
                 DCD     DMA1_Channel1_IRQHandler  ; DMA1 Channel
                 DCD     DMA1_Channel2_IRQHandler  ; DMA1 Channel
                 DCD     DMA1_Channel3_IRQHandler  ; DMA1 Channel
                 DCD     DMA1_Channel4_IRQHandler  ; DMA1 Channel
                 DCD     DMA1_Channel5_IRQHandler  ; DMA1 Channel
                 DCD     DMA1_Channel6_IRQHandler  ; DMA1 Channel
                 DCD     DMA1_Channel7_IRQHandler  ; DMA1 Channel
                 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 ..
                 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
                 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 ..
                 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

 __Vectors_Size     EQU     __Vectors_End - __Vectors

                 AREA    |.text|, CODE, READONLY      ;定义以下汇编函数将调用C函数

 ; Dummy SystemInit_ExtMemCtl function
 SystemInit_ExtMemCtl     PROC
                 EXPORT  SystemInit_ExtMemCtl      [WEAK]
                 BX      LR
                 ENDP

 ; Reset handler routine
 Reset_Handler   PROC
                 EXPORT  Reset_Handler             [WEAK]     ;这里就是复位函数了
                 IMPORT  __main                               ;这个是定义一个外部的函数方便下边调用。这个函数是编译器自带的C环境运行函数名

  LDR     R0, = SystemInit_ExtMemCtl ; initialize external memory controller
                 BLX     R0

                 LDR     R1, = __initial_sp        ; restore original stack pointer
                 MSR     MSP, R1                   

                 LDR     R0, =__main               ;跳转上边定义的外部函数处执行。这里需要解释一下：这个“__main”函数不是我们在C语言中写的“main”函数。但他在创建了C函数的运行环境后会跳转到我们在C语言中写的“main”函数中去。
                 BX      R0                        ;这个就是跳转指令了
                 ENDP

 ; Dummy Exception Handlers (infinite loops which can be modified)   以下为中断函数的伪定义，当外部有对应的中断函数时，这里的中断函数不起作用。

作为一名资深码农,还是要具备专业英文阅读的能力.

错误：A1163E：未知操作指令R0，预指令或者宏错误.

也就是说R0未识别，记得以前看过博客好像是说

1.ARM汇编指令不支持顶格写，否则不能识别

2. 声明变量时不要有空格

可能是缩进造成的问题，。

就在前面加了一个空格。OK

0个错误，0个警告，全部重新生成。

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