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求大佬分享stm32启动程序

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问答对人有帮助，内容完整，我也想知道答案 0 求大佬分享STM32启动程序 0
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答案对人有帮助，有参考价值 0 / *********** (C) COPYRIGHT 2017 STMicroelectronics ********************** * @file startup_stm32f103xb.s * @author MCD Application Team * @brief STM32F103xB Devices vector table for Atollic toolchain. * STM32F103xB工具链的设备向量表。 * This module performs: * 本模块执行： * - Set the initial SP * - Set the initial PC == Reset_Handler, * - Set the vector table entries with the exceptions ISR address 设置向量表条目，但ISR地址除外 * - Configure the clock system * - Branches to main in the C library (which eventually * calls main()). * After Reset the Cortex-M3 processor is in Thread mode, * priority is Privileged, and the Stack is set to Main. * 重置后，Cortex-M3处理器处于线程模式，优先级为特权，堆栈设置为Main。 ****************************************************************************** * @attention * * © Copyright (c) 2017 STMicroelectronics. * All rights reserved. * * This software component is licensed by ST under BSD 3-Clause license, * the "License"; You may not use this file except in compliance with the * License. You may obtain a copy of the License at: * 此软件组件由ST根据BSD 3条款许可证（“许可证”）进行许可；除非符合许可证的要求，否则您不得使用此文件。您可以通过以下网址获得许可证副本： * opensource.org/licenses/BSD-3-Clause * ****************************************************************************** / .syntax unified 表示使用了统一汇编语言语法 .cpu cortex-m3 MCU为CM3核心 .fpu softvfp .thumb Thumb是ARM体系结构中一种16位的指令集。 .global g_pfnVectors global使得g_pfnVectors可以被其他目标文件使用 .global Default_Handler 声明为全局符号 / start address for the initialization values of the .data section. defined in linker script .data节的初始化值的起始地址。在链接器脚本中定义/ .word _sidata 定义word变量 (4字节 32位机) / start address for the .data section. defined in linker script / .word _sdata .data开始地址 / end address for the .data section. defined in linker script / .word _edata .data开始地址 / start address for the .bss section. defined in linker script / .word _*ss .bss 开始地址 / end address for the .bss section. defined in linker script / .word _ebss .bss结束地址 .equ BootRAM, 0xF1E0F85F 定义宏 /* * @brief This is the code that gets called when the processor first * starts execution following a reset event. Only the absolutely * necessary set is performed, after which the application * supplied main() routine is called. * 这是在重置事件后处理器首次开始执行时调用的代码。只执行绝对必要的设置，然后调用应用程序提供的main（）例程。 * @param None * @retval : None / .section .text.Reset_Handler /汇编程序中以.开头的名称并不是指令的助记符，不会被翻译成机器指令，而是给汇编器一些特殊指示，称为汇编指示（Assembler Directive）或伪操作（Pseudo-operation），由于它不是真正的指令所以加个“伪”字。.section指示把代码划分成若干个段（Section），程序**作系统加载执行时，每个段被加载到不同的地址，操作系统对不同的页面设置不同的读、写、执行权限。.data段保存程序的数据，是可读可写的，相当于C程序的全局变量。本程序中没有定义数据，所以.data段是空的。 .section .text .text段保存代码，是只读和可执行的，后面那些指令都属于.text段。/ .weak Reset_Handler 声明其他的同名标号优先于该标号被引用。 .type Reset_Handler, %function .type name,@type:将符号name的type属性设为type。其中type可以是function或object Reset_Handler: /* Copy the data segment initializers from flash to SRAM /将数据段初始值设定项从flash复制到SRAM movs r1, #0 b LoopCopyDataInit CopyDataInit: ldr r3, =_sidata ldr r3, [r3, r1] str r3, [r0, r1] adds r1, r1, #4 LoopCopyDataInit: ldr r0, =_sdata //把_sdata里面的数据给r0 ldr r3, =_edata adds r2, r0, r1 cmp r2, r3 bcc CopyDataInit 无进位 ldr r2, =_*ss b LoopFillZerobss / Zero fill the bss segment. / FillZerobss: movs r3, #0 str r3, [r2], #4 LoopFillZerobss: ldr r3, = _ebss cmp r2, r3 bcc FillZerobss / Call the clock system intitialization function./ bl SystemInit / Call static constructors / / bl __libc_init_array / / Call the application's entry point./ bl entry bx lr .size Reset_Handler, .-Reset_Handler /* * @brief This is the code that gets called when the processor receives an * unexpected interrupt. This simply enters an infinite loop, preserving * the system state for examination by a debugger. * 这是当处理器接收到意外中断时调用的代码。这只是进入一个无限循环，保留系统状态供调试器检查。 * @param None * @retval None / .section .text.Default_Handler,"ax",%progbits Default_Handler: Infinite_Loop: b Infinite_Loop .size Default_Handler, .-Default_Handler /***************************************************************************** * * The minimal vector table for a Cortex M3. Note that the proper constructs * must be placed on this to ensure that it ends up at physical address * M3的最小向量表。请注意，必须将适当的构造放在这个上，以确保它最终位于物理地址 * 0x0000.0000. * ******************************************************************************/ .section .isr_vector,"a",%progbits .type g_pfnVectors, %object .size g_pfnVectors, .-g_pfnVectors g_pfnVectors: .word _estack .word Reset_Handler .word NMI_Handler .word HardFault_Handler .word MemManage_Handler .word BusFault_Handler .word UsageFault_Handler .word 0 .word 0 .word 0 .word 0 .word SVC_Handler .word DebugMon_Handler .word 0 .word PendSV_Handler .word SysTick_Handler .word WWDG_IRQHandler .word PVD_IRQHandler .word TAMPER_IRQHandler .word RTC_IRQHandler .word FLASH_IRQHandler .word RCC_IRQHandler .word EXTI0_IRQHandler .word EXTI1_IRQHandler .word EXTI2_IRQHandler .word EXTI3_IRQHandler .word EXTI4_IRQHandler .word DMA1_Channel1_IRQHandler .word DMA1_Channel2_IRQHandler .word DMA1_Channel3_IRQHandler .word DMA1_Channel4_IRQHandler .word DMA1_Channel5_IRQHandler .word DMA1_Channel6_IRQHandler .word DMA1_Channel7_IRQHandler .word ADC1_2_IRQHandler .word USB_HP_CAN1_TX_IRQHandler .word USB_LP_CAN1_RX0_IRQHandler .word CAN1_RX1_IRQHandler .word CAN1_SCE_IRQHandler .word EXTI9_5_IRQHandler .word TIM1_BRK_TIM9_IRQHandler .word TIM1_UP_TIM10_IRQHandler .word TIM1_TRG_COM_TIM11_IRQHandler .word TIM1_CC_IRQHandler .word TIM2_IRQHandler .word TIM3_IRQHandler .word TIM4_IRQHandler .word I2C1_EV_IRQHandler .word I2C1_ER_IRQHandler .word I2C2_EV_IRQHandler .word I2C2_ER_IRQHandler .word SPI1_IRQHandler .word SPI2_IRQHandler .word USART1_IRQHandler .word USART2_IRQHandler .word USART3_IRQHandler .word EXTI15_10_IRQHandler .word RTC_Alarm_IRQHandler .word USBWakeUp_IRQHandler .word TIM8_BRK_TIM12_IRQHandler .word TIM8_UP_TIM13_IRQHandler .word TIM8_TRG_COM_TIM14_IRQHandler .word TIM8_CC_IRQHandler .word ADC3_IRQHandler .word FSMC_IRQHandler .word SDIO_IRQHandler .word TIM5_IRQHandler .word SPI3_IRQHandler .word UART4_IRQHandler .word UART5_IRQHandler .word TIM6_IRQHandler .word TIM7_IRQHandler .word DMA2_Channel1_IRQHandler .word DMA2_Channel2_IRQHandler .word DMA2_Channel3_IRQHandler .word DMA2_Channel4_5_IRQHandler .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word 0 .word BootRAM / @0x1E0. This is for boot in RAM mode for STM32F10x XL-Density devices. / /****************************************************************************** * * Provide weak aliases for each Exception handler to the Default_Handler. * As they are weak aliases, any function with the same name will override * this definition. * 为默认u处理程序的每个异常处理程序提供弱别名。由于它们是弱别名，任何同名函数都将重写此定义。 *****************************************************************************/ .weak NMI_Handler .thumb_set NMI_Handler,Default_Handler .weak HardFault_Handler .thumb_set HardFault_Handler,Default_Handler .weak MemManage_Handler .thumb_set MemManage_Handler,Default_Handler .weak BusFault_Handler .thumb_set BusFault_Handler,Default_Handler .weak UsageFault_Handler .thumb_set UsageFault_Handler,Default_Handler .weak SVC_Handler .thumb_set SVC_Handler,Default_Handler .weak DebugMon_Handler .thumb_set DebugMon_Handler,Default_Handler .weak PendSV_Handler .thumb_set PendSV_Handler,Default_Handler .weak SysTick_Handler .thumb_set SysTick_Handler,Default_Handler .weak WWDG_IRQHandler .thumb_set WWDG_IRQHandler,Default_Handler .weak PVD_IRQHandler .thumb_set PVD_IRQHandler,Default_Handler .weak TAMPER_IRQHandler .thumb_set TAMPER_IRQHandler,Default_Handler .weak RTC_IRQHandler .thumb_set RTC_IRQHandler,Default_Handler .weak FLASH_IRQHandler .thumb_set FLASH_IRQHandler,Default_Handler .weak RCC_IRQHandler .thumb_set RCC_IRQHandler,Default_Handler .weak EXTI0_IRQHandler .thumb_set EXTI0_IRQHandler,Default_Handler .weak EXTI1_IRQHandler .thumb_set EXTI1_IRQHandler,Default_Handler .weak EXTI2_IRQHandler .thumb_set EXTI2_IRQHandler,Default_Handler .weak EXTI3_IRQHandler .thumb_set EXTI3_IRQHandler,Default_Handler .weak EXTI4_IRQHandler .thumb_set EXTI4_IRQHandler,Default_Handler .weak DMA1_Channel1_IRQHandler .thumb_set DMA1_Channel1_IRQHandler,Default_Handler .weak DMA1_Channel2_IRQHandler .thumb_set DMA1_Channel2_IRQHandler,Default_Handler .weak DMA1_Channel3_IRQHandler .thumb_set DMA1_Channel3_IRQHandler,Default_Handler .weak DMA1_Channel4_IRQHandler .thumb_set DMA1_Channel4_IRQHandler,Default_Handler .weak DMA1_Channel5_IRQHandler .thumb_set DMA1_Channel5_IRQHandler,Default_Handler .weak DMA1_Channel6_IRQHandler .thumb_set DMA1_Channel6_IRQHandler,Default_Handler .weak DMA1_Channel7_IRQHandler .thumb_set DMA1_Channel7_IRQHandler,Default_Handler .weak ADC1_2_IRQHandler .thumb_set ADC1_2_IRQHandler,Default_Handler .weak USB_HP_CAN1_TX_IRQHandler .thumb_set USB_HP_CAN1_TX_IRQHandler,Default_Handler .weak USB_LP_CAN1_RX0_IRQHandler .thumb_set USB_LP_CAN1_RX0_IRQHandler,Default_Handler .weak CAN1_RX1_IRQHandler .thumb_set CAN1_RX1_IRQHandler,Default_Handler .weak CAN1_SCE_IRQHandler .thumb_set CAN1_SCE_IRQHandler,Default_Handler .weak EXTI9_5_IRQHandler .thumb_set EXTI9_5_IRQHandler,Default_Handler .weak TIM1_BRK_TIM9_IRQHandler .thumb_set TIM1_BRK_TIM9_IRQHandler,Default_Handler .weak TIM1_UP_TIM10_IRQHandler .thumb_set TIM1_UP_TIM10_IRQHandler,Default_Handler .weak TIM1_TRG_COM_TIM11_IRQHandler .thumb_set TIM1_TRG_COM_TIM11_IRQHandler,Default_Handler .weak TIM1_CC_IRQHandler .thumb_set TIM1_CC_IRQHandler,Default_Handler .weak TIM2_IRQHandler .thumb_set TIM2_IRQHandler,Default_Handler .weak TIM3_IRQHandler .thumb_set TIM3_IRQHandler,Default_Handler .weak TIM4_IRQHandler .thumb_set TIM4_IRQHandler,Default_Handler .weak I2C1_EV_IRQHandler .thumb_set I2C1_EV_IRQHandler,Default_Handler .weak I2C1_ER_IRQHandler .thumb_set I2C1_ER_IRQHandler,Default_Handler .weak I2C2_EV_IRQHandler .thumb_set I2C2_EV_IRQHandler,Default_Handler .weak I2C2_ER_IRQHandler .thumb_set I2C2_ER_IRQHandler,Default_Handler .weak SPI1_IRQHandler .thumb_set SPI1_IRQHandler,Default_Handler .weak SPI2_IRQHandler .thumb_set SPI2_IRQHandler,Default_Handler .weak USART1_IRQHandler .thumb_set USART1_IRQHandler,Default_Handler .weak USART2_IRQHandler .thumb_set USART2_IRQHandler,Default_Handler .weak USART3_IRQHandler .thumb_set USART3_IRQHandler,Default_Handler .weak EXTI15_10_IRQHandler .thumb_set EXTI15_10_IRQHandler,Default_Handler .weak RTC_Alarm_IRQHandler .thumb_set RTC_Alarm_IRQHandler,Default_Handler .weak USBWakeUp_IRQHandler .thumb_set USBWakeUp_IRQHandler,Default_Handler .weak TIM8_BRK_TIM12_IRQHandler .thumb_set TIM8_BRK_TIM12_IRQHandler,Default_Handler .weak TIM8_UP_TIM13_IRQHandler .thumb_set TIM8_UP_TIM13_IRQHandler,Default_Handler .weak TIM8_TRG_COM_TIM14_IRQHandler .thumb_set TIM8_TRG_COM_TIM14_IRQHandler,Default_Handler .weak TIM8_CC_IRQHandler .thumb_set TIM8_CC_IRQHandler,Default_Handler .weak ADC3_IRQHandler .thumb_set ADC3_IRQHandler,Default_Handler .weak FSMC_IRQHandler .thumb_set FSMC_IRQHandler,Default_Handler .weak SDIO_IRQHandler .thumb_set SDIO_IRQHandler,Default_Handler .weak TIM5_IRQHandler .thumb_set TIM5_IRQHandler,Default_Handler .weak SPI3_IRQHandler .thumb_set SPI3_IRQHandler,Default_Handler .weak UART4_IRQHandler .thumb_set UART4_IRQHandler,Default_Handler .weak UART5_IRQHandler .thumb_set UART5_IRQHandler,Default_Handler .weak TIM6_IRQHandler .thumb_set TIM6_IRQHandler,Default_Handler .weak TIM7_IRQHandler .thumb_set TIM7_IRQHandler,Default_Handler .weak DMA2_Channel1_IRQHandler .thumb_set DMA2_Channel1_IRQHandler,Default_Handler .weak DMA2_Channel2_IRQHandler .thumb_set DMA2_Channel2_IRQHandler,Default_Handler .weak DMA2_Channel3_IRQHandler .thumb_set DMA2_Channel3_IRQHandler,Default_Handler .weak DMA2_Channel4_5_IRQHandler .thumb_set DMA2_Channel4_5_IRQHandler,Default_Handler /******************** (C) COPYRIGHT STMicroelectronics *END OF FILE**/

2021-11-29 10:54:40 评论举报冯栋