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/**

  *************** (C) COPYRIGHT 2017 STMicroelectronics ************************

  * @file      startup_stm32f103xb.s

  * @author    MCD Application Team

  * @brief     STM32F103xB Devices vector table for Atollic toolchain.

  *            This module performs:

  *                - Set the initial SP

  *                - Set the initial PC == Reset_Handler,

  *                - Set the vector table entries with the exceptions ISR address

  *                - 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.

  ******************************************************************************

  * @attention

  *

  * Copyright (c) 2017-2021 STMicroelectronics.

  * All rights reserved.

  *

  * This software is licensed under terms that can be found in the LICENSE file

  * in the root directory of this software component.

  * If no LICENSE file comes with this software, it is provided AS-IS.

  *

  ******************************************************************************

  */

  .syntax unified

  .cpu cortex-m3

  .fpu softvfp

  .thumb

.global g_pfnVectors

.global Default_Handler

/* start address for the initialization values of the .data section.

defined in linker script */

.word _sidata

/* start address for the .data section. defined in linker script */

.word _sdata

/* end address for the .data section. defined in linker script */

.word _edata

/* start address for the .bss section. defined in linker script */

.word _sbss

/* end address for the .bss section. defined in linker script */

.word _ebss

.equ  BootRAM, 0xF108F85F

/**

 * @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.

 * @param  None

 * @retval : None

*/

  .section .text.Reset_Handler

  .weak Reset_Handler

  .type Reset_Handler, %function

Reset_Handler:

/* Call the clock system initialization function.*/

    bl  SystemInit

/* Copy the data segment initializers from flash to SRAM */

  ldr r0, =_sdata

  ldr r1, =_edata

  ldr r2, =_sidata

  movs r3, #0

  b LoopCopyDataInit

CopyDataInit:

  ldr r4, [r2, r3]

  str r4, [r0, r3]

  adds r3, r3, #4

LoopCopyDataInit:

  adds r4, r0, r3

  cmp r4, r1

  bcc CopyDataInit

/* Zero fill the bss segment. */

  ldr r2, =_sbss

  ldr r4, =_ebss

  movs r3, #0

  b LoopFillZerobss

FillZerobss:

  str  r3, [r2]

  adds r2, r2, #4

LoopFillZerobss:

  cmp r2, r4

  bcc FillZerobss

/* Call static constructors */

    bl __libc_init_array

/* Call the application's entry point.*/

  bl main

  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.

 *

 * @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

* 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_IRQHandler

  .word TIM1_UP_IRQHandler

  .word TIM1_TRG_COM_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 0

  .word 0

  .word 0

  .word 0

  .word 0

  .word 0

  .word 0

  .word BootRAM          /* @0x108. This is for boot in RAM mode for

                            STM32F10x Medium 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.

*

*******************************************************************************/

  .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_IRQHandler

  .thumb_set TIM1_BRK_IRQHandler,Default_Handler

  .weak TIM1_UP_IRQHandler

  .thumb_set TIM1_UP_IRQHandler,Default_Handler

  .weak TIM1_TRG_COM_IRQHandler

  .thumb_set TIM1_TRG_COM_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