/**
  ******************************************************************************
  * @file      startup_stm32f401xc.s
  * @author    MCD Application Team
  * @brief     STM32F401xCxx Devices vector table for GCC based toolchains. 
  *            This module performs:
  *                - Set the initial SP
  *                - Set the initial PC == Reset_Handler,
  *                - Set the vector table entries with the exceptions ISR address
  *                - 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.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2017 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-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
/* stack used for SystemInit_ExtMemCtl; always internal RAM used */

/**
 * @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      /* set stack pointer */

/* 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 the clock system initialization function.*/
  bl  SystemInit   
/* 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
  
  /* External Interrupts */
  .word     WWDG_IRQHandler                   /* Window WatchDog              */                                        
  .word     PVD_IRQHandler                    /* PVD through EXTI Line detection */                        
  .word     TAMP_STAMP_IRQHandler             /* Tamper and TimeStamps through the EXTI line */            
  .word     RTC_WKUP_IRQHandler               /* RTC Wakeup through the EXTI line */                      
  .word     FLASH_IRQHandler                  /* FLASH                        */                                          
  .word     RCC_IRQHandler                    /* RCC                          */                                            
  .word     EXTI0_IRQHandler                  /* EXTI Line0                   */                        
  .word     EXTI1_IRQHandler                  /* EXTI Line1                   */                          
  .word     EXTI2_IRQHandler                  /* EXTI Line2                   */                          
  .word     EXTI3_IRQHandler                  /* EXTI Line3                   */                          
  .word     EXTI4_IRQHandler                  /* EXTI Line4                   */                          
  .word     DMA1_Stream0_IRQHandler           /* DMA1 Stream 0                */                  
  .word     DMA1_Stream1_IRQHandler           /* DMA1 Stream 1                */                   
  .word     DMA1_Stream2_IRQHandler           /* DMA1 Stream 2                */                   
  .word     DMA1_Stream3_IRQHandler           /* DMA1 Stream 3                */                   
  .word     DMA1_Stream4_IRQHandler           /* DMA1 Stream 4                */                   
  .word     DMA1_Stream5_IRQHandler           /* DMA1 Stream 5                */                   
  .word     DMA1_Stream6_IRQHandler           /* DMA1 Stream 6                */                   
  .word     ADC_IRQHandler                    /* ADC1                         */                   
  .word     0               				  /* Reserved                     */                         
  .word     0              					  /* Reserved                     */                          
  .word     0                                 /* Reserved                     */                          
  .word     0                                 /* Reserved                     */                          
  .word     EXTI9_5_IRQHandler                /* External Line[9:5]s          */                          
  .word     TIM1_BRK_TIM9_IRQHandler          /* TIM1 Break and TIM9          */         
  .word     TIM1_UP_TIM10_IRQHandler          /* TIM1 Update and TIM10        */         
  .word     TIM1_TRG_COM_TIM11_IRQHandler     /* TIM1 Trigger and Commutation and TIM11 */
  .word     TIM1_CC_IRQHandler                /* TIM1 Capture Compare         */                          
  .word     TIM2_IRQHandler                   /* TIM2                         */                   
  .word     TIM3_IRQHandler                   /* TIM3                         */                   
  .word     TIM4_IRQHandler                   /* TIM4                         */                   
  .word     I2C1_EV_IRQHandler                /* I2C1 Event                   */                          
  .word     I2C1_ER_IRQHandler                /* I2C1 Error                   */                          
  .word     I2C2_EV_IRQHandler                /* I2C2 Event                   */                          
  .word     I2C2_ER_IRQHandler                /* I2C2 Error                   */                            
  .word     SPI1_IRQHandler                   /* SPI1                         */                   
  .word     SPI2_IRQHandler                   /* SPI2                         */                   
  .word     USART1_IRQHandler                 /* USART1                       */                   
  .word     USART2_IRQHandler                 /* USART2                       */                   
  .word     0               				  /* Reserved                     */                   
  .word     EXTI15_10_IRQHandler              /* External Line[15:10]s        */                          
  .word     RTC_Alarm_IRQHandler              /* RTC Alarm (A and B) through EXTI Line */                 
  .word     OTG_FS_WKUP_IRQHandler            /* USB OTG FS Wakeup through EXTI line */                       
  .word     0                                 /* Reserved     				        */         
  .word     0                                 /* Reserved       			        */         
  .word     0                                 /* Reserved 					          */
  .word     0                                 /* Reserved                     */                          
  .word     DMA1_Stream7_IRQHandler           /* DMA1 Stream7                 */                          
  .word     0                                 /* Reserved                     */                   
  .word     SDIO_IRQHandler                   /* SDIO                         */                   
  .word     TIM5_IRQHandler                   /* TIM5                         */                   
  .word     SPI3_IRQHandler                   /* SPI3                         */                   
  .word     0                                 /* Reserved                     */                   
  .word     0                                 /* Reserved                     */                   
  .word     0                                 /* Reserved                     */                   
  .word     0                                 /* Reserved                     */
  .word     DMA2_Stream0_IRQHandler           /* DMA2 Stream 0                */                   
  .word     DMA2_Stream1_IRQHandler           /* DMA2 Stream 1                */                   
  .word     DMA2_Stream2_IRQHandler           /* DMA2 Stream 2                */                   
  .word     DMA2_Stream3_IRQHandler           /* DMA2 Stream 3                */                   
  .word     DMA2_Stream4_IRQHandler           /* DMA2 Stream 4                */                   
  .word     0                    			        /* Reserved                     */                   
  .word     0              					          /* Reserved                     */                     
  .word     0              					          /* Reserved                     */                          
  .word     0             					          /* Reserved                     */                          
  .word     0              					          /* Reserved                     */                          
  .word     0              					          /* Reserved                     */                          
  .word     OTG_FS_IRQHandler                 /* USB OTG FS                   */                   
  .word     DMA2_Stream5_IRQHandler           /* DMA2 Stream 5                */                   
  .word     DMA2_Stream6_IRQHandler           /* DMA2 Stream 6                */                   
  .word     DMA2_Stream7_IRQHandler           /* DMA2 Stream 7                */                   
  .word     USART6_IRQHandler                 /* USART6                       */                    
  .word     I2C3_EV_IRQHandler                /* I2C3 event                   */                          
  .word     I2C3_ER_IRQHandler                /* I2C3 error                   */                          
  .word     0                                 /* Reserved                     */                   
  .word     0                                 /* Reserved                     */                   
  .word     0                                 /* Reserved                     */                         
  .word     0                                 /* Reserved                     */                   
  .word     0                                 /* Reserved                     */                   
  .word     0                                 /* Reserved                     */                   
  .word     0                                 /* Reserved                     */
  .word     FPU_IRQHandler                    /* FPU                          */
  .word     0                                 /* Reserved                     */                   
  .word     0                                 /* Reserved                     */
  .word     SPI4_IRQHandler                   /* SPI4                         */     
                    
/*******************************************************************************
*
* 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_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_Stream0_IRQHandler               
   .thumb_set DMA1_Stream0_IRQHandler,Default_Handler
         
   .weak      DMA1_Stream1_IRQHandler               
   .thumb_set DMA1_Stream1_IRQHandler,Default_Handler
                  
   .weak      DMA1_Stream2_IRQHandler               
   .thumb_set DMA1_Stream2_IRQHandler,Default_Handler
                  
   .weak      DMA1_Stream3_IRQHandler               
   .thumb_set DMA1_Stream3_IRQHandler,Default_Handler 
                 
   .weak      DMA1_Stream4_IRQHandler              
   .thumb_set DMA1_Stream4_IRQHandler,Default_Handler
                  
   .weak      DMA1_Stream5_IRQHandler               
   .thumb_set DMA1_Stream5_IRQHandler,Default_Handler
                  
   .weak      DMA1_Stream6_IRQHandler               
   .thumb_set DMA1_Stream6_IRQHandler,Default_Handler
                  
   .weak      ADC_IRQHandler      
   .thumb_set ADC_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      EXTI15_10_IRQHandler               
   .thumb_set EXTI15_10_IRQHandler,Default_Handler
               
   .weak      RTC_Alarm_IRQHandler               
   .thumb_set RTC_Alarm_IRQHandler,Default_Handler
            
   .weak      OTG_FS_WKUP_IRQHandler         
   .thumb_set OTG_FS_WKUP_IRQHandler,Default_Handler
            
   .weak      DMA1_Stream7_IRQHandler               
   .thumb_set DMA1_Stream7_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      DMA2_Stream0_IRQHandler               
   .thumb_set DMA2_Stream0_IRQHandler,Default_Handler
               
   .weak      DMA2_Stream1_IRQHandler               
   .thumb_set DMA2_Stream1_IRQHandler,Default_Handler
                  
   .weak      DMA2_Stream2_IRQHandler               
   .thumb_set DMA2_Stream2_IRQHandler,Default_Handler
            
   .weak      DMA2_Stream3_IRQHandler               
   .thumb_set DMA2_Stream3_IRQHandler,Default_Handler
            
   .weak      DMA2_Stream4_IRQHandler               
   .thumb_set DMA2_Stream4_IRQHandler,Default_Handler
            
   .weak      OTG_FS_IRQHandler      
   .thumb_set OTG_FS_IRQHandler,Default_Handler
                     
   .weak      DMA2_Stream5_IRQHandler               
   .thumb_set DMA2_Stream5_IRQHandler,Default_Handler
                  
   .weak      DMA2_Stream6_IRQHandler               
   .thumb_set DMA2_Stream6_IRQHandler,Default_Handler
                  
   .weak      DMA2_Stream7_IRQHandler               
   .thumb_set DMA2_Stream7_IRQHandler,Default_Handler
                  
   .weak      USART6_IRQHandler      
   .thumb_set USART6_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  

   .weak      SPI4_IRQHandler                  
   .thumb_set SPI4_IRQHandler,Default_Handler