/**
  ******************************************************************************
  * @file      startup_stm32f301x8.s
  * @author    MCD Application Team
  * @brief     STM32F301x6/STM32F301x8 devices vector table for GCC 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-M4 processor is in Thread mode,
  *            priority is Privileged, and the Stack is set to Main.
  ******************************************************************************
  * 
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */

  .syntax unified
	.cpu cortex-m4
	.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,        0xF1E0F85F
/**
 * @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:
  ldr   sp, =_estack    /* Atollic update: set stack pointer */

/* Copy the data segment initializers from flash to 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
	ldr	r3, =_edata
	adds	r2, r0, r1
	cmp	r2, r3
	bcc	CopyDataInit
	ldr	r2, =_sbss
	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	main

LoopForever:
    b LoopForever
    
.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-M4.  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	TAMP_STAMP_IRQHandler
	.word	RTC_WKUP_IRQHandler
	.word	FLASH_IRQHandler
	.word	RCC_IRQHandler
	.word	EXTI0_IRQHandler
	.word	EXTI1_IRQHandler
	.word	EXTI2_TSC_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_IRQHandler
	.word	0
	.word	0
	.word	0
	.word	0
	.word	EXTI9_5_IRQHandler
	.word	TIM1_BRK_TIM15_IRQHandler
	.word	TIM1_UP_TIM16_IRQHandler
	.word	TIM1_TRG_COM_TIM17_IRQHandler
	.word	TIM1_CC_IRQHandler
	.word	TIM2_IRQHandler
	.word	0
	.word	0
	.word	I2C1_EV_IRQHandler
	.word	I2C1_ER_IRQHandler
	.word	I2C2_EV_IRQHandler
	.word	I2C2_ER_IRQHandler
	.word	0
	.word	SPI2_IRQHandler
	.word	USART1_IRQHandler
	.word	USART2_IRQHandler
	.word	USART3_IRQHandler
	.word	EXTI15_10_IRQHandler
	.word	RTC_Alarm_IRQHandler
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	SPI3_IRQHandler
	.word	0
	.word	0
	.word	TIM6_DAC_IRQHandler
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	COMP2_IRQHandler
	.word	COMP4_6_IRQHandler
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	I2C3_EV_IRQHandler
	.word	I2C3_ER_IRQHandler
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	0
	.word	FPU_IRQHandler

/*******************************************************************************
*
* 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	TAMP_STAMP_IRQHandler
	.thumb_set TAMP_STAMP_IRQHandler,Default_Handler

	.weak	RTC_WKUP_IRQHandler
	.thumb_set RTC_WKUP_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_TSC_IRQHandler
	.thumb_set EXTI2_TSC_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_IRQHandler
	.thumb_set ADC1_IRQHandler,Default_Handler

	.weak	EXTI9_5_IRQHandler
	.thumb_set EXTI9_5_IRQHandler,Default_Handler

	.weak	TIM1_BRK_TIM15_IRQHandler
	.thumb_set TIM1_BRK_TIM15_IRQHandler,Default_Handler

	.weak	TIM1_UP_TIM16_IRQHandler
	.thumb_set TIM1_UP_TIM16_IRQHandler,Default_Handler

	.weak	TIM1_TRG_COM_TIM17_IRQHandler
	.thumb_set TIM1_TRG_COM_TIM17_IRQHandler,Default_Handler

	.weak	TIM1_CC_IRQHandler
	.thumb_set TIM1_CC_IRQHandler,Default_Handler

	.weak	TIM2_IRQHandler
	.thumb_set TIM2_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	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	SPI3_IRQHandler
	.thumb_set SPI3_IRQHandler,Default_Handler

	.weak	TIM6_DAC_IRQHandler
	.thumb_set TIM6_DAC_IRQHandler,Default_Handler

	.weak	COMP2_IRQHandler
	.thumb_set COMP2_IRQHandler,Default_Handler
	
	.weak	COMP4_6_IRQHandler
	.thumb_set COMP4_6_IRQHandler,Default_Handler
	
	.weak	I2C3_EV_IRQHandler
	.thumb_set I2C3_EV_IRQHandler,Default_Handler
    
	.weak	I2C3_ER_IRQHandler
	.thumb_set I2C3_ER_IRQHandler,Default_Handler
	
	.weak	FPU_IRQHandler
	.thumb_set FPU_IRQHandler,Default_Handler
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/