 /*            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.
  ******************************************************************************
  */


  .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:

/* 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 */
// nope no C++ code today
//    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	LVD_IRQHandler
	.word	RTC_IRQHandler
	.word	FMC_IRQHandler
	.word	RCU_IRQHandler
	.word	EXTI0_1_IRQHandler
	.word	EXTI2_3_IRQHandler
	.word	EXTI4_15_IRQHandler
	.word	TSI_IRQHandler
	.word	DMA_Channel0_IRQHandler
	.word	DMA_Channel1_2_IRQHandler
	.word	DMA_Channel3_4_IRQHandler
	.word	ADC_CMP_IRQHandler
	.word	TIMER0_BRK_UP_TRG_COM_IRQHandler
	.word	TIMER0_Channel_IRQHandler
	.word	TIMER1_IRQHandler
	.word	TIMER2_IRQHandler
	.word	TIMER5_DAC_IRQHandler
	.word	0
	.word	TIMER13_IRQHandler
	.word	TIMER14_IRQHandler
	.word	TIMER15_IRQHandler
	.word	TIMER16_IRQHandler
	.word	I2C0_EV_IRQHandler
	.word	I2C1_EV_IRQHandler
	.word	SPI0_IRQHandler
	.word	SPI1_IRQHandler
	.word	USART0_IRQHandler
	.word	USART1_IRQHandler
	.word	0
	.word	CEC_IRQHandler
	.word	0
	.word	I2C0_ER_IRQHandler
	.word	0
	.word	I2C1_ER_IRQHandler
	.word	I2C2_EV_IRQHandler
	.word	I2C2_ER_IRQHandler
	.word	USBD_LP_IRQHandler
	.word	USBD_HP_IRQHandler
	.word	0
	.word	0
	.word	0
	.word	USBDWakeUp_IRQHandler
	.word	CAN0_TX_IRQHandler
	.word	CAN0_RX0_IRQHandler
	.word	CAN0_RX1_IRQHandler
	.word	CAN0_SCE_IRQHandler
	.word	SLCD_IRQHandler
	.word	DMA_Channel5_6_IRQHandler
	.word	0
	.word	0
	.word	SPI2_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   CAN1_TX_IRQHandler
	.word   CAN1_RX0_IRQHandler
	.word   CAN1_RX1_IRQHandler
	.word   CAN1_SCE_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	LVD_IRQHandler
	.thumb_set LVD_IRQHandler,Default_Handler

	.weak	RTC_IRQHandler
	.thumb_set RTC_IRQHandler,Default_Handler

	.weak	FMC_IRQHandler
	.thumb_set FMC_IRQHandler,Default_Handler

	.weak	RCU_IRQHandler
	.thumb_set RCC_IRQHandler,Default_Handler

	.weak	EXTI0_1_IRQHandler
	.thumb_set EXTI0_1_IRQHandler,Default_Handler

	.weak	EXTI2_3_IRQHandler
	.thumb_set EXTI2_3_IRQHandler,Default_Handler

	.weak	EXTI4_15_IRQHandler
	.thumb_set EXTI4_15_IRQHandler,Default_Handler

	.weak	TSI_IRQHandler
	.thumb_set TSI_IRQHandler,Default_Handler

	.weak	DMA_Channel0_IRQHandler
	.thumb_set DMA_Channel0_IRQHandler,Default_Handler

	.weak	DMA_Channel1_2_IRQHandler
	.thumb_set DMA_Channel1_2_IRQHandler,Default_Handler

	.weak	DMA_Channel3_4_IRQHandler
	.thumb_set DMA_Channel3_4_IRQHandler,Default_Handler

	.weak	ADC_CMP_IRQHandler
	.thumb_set ADC_CMP_IRQHandler,Default_Handler

	.weak	TIMER0_BRK_UP_TRG_COM_IRQHandler
	.thumb_set TIMER0_BRK_UP_TRG_COM_IRQHandler,Default_Handler

	.weak	TIMER0_Channel_IRQHandler
	.thumb_set TIMER0_Channel_IRQHandler,Default_Handler

	.weak	TIMER1_IRQHandler
	.thumb_set TIMER1_IRQHandler,Default_Handler

	.weak	TIMER2_IRQHandler
	.thumb_set TIMER2_IRQHandler,Default_Handler

	.weak	TIMER5_DAC_IRQHandler
	.thumb_set TIMER5_DAC_IRQHandler,Default_Handler

	.weak	TIMER13_IRQHandler
	.thumb_set TIMER13_IRQHandler,Default_Handler

	.weak	TIMER14_IRQHandler
	.thumb_set TIMER14_IRQHandler,Default_Handler

	.weak	TIMER15_IRQHandler
	.thumb_set TIMER15_IRQHandler,Default_Handler

	.weak	TIMER16_IRQHandler
	.thumb_set TIMER16_IRQHandler,Default_Handler

	.weak	I2C0_EV_IRQHandler
	.thumb_set I2C0_EV_IRQHandler,Default_Handler

	.weak	I2C1_EV_IRQHandler
	.thumb_set I2C1_EV_IRQHandler,Default_Handler

	.weak	SPI0_IRQHandler
	.thumb_set SPI0_IRQHandler,Default_Handler

	.weak	SPI1_IRQHandler
	.thumb_set SPI1_IRQHandler,Default_Handler

	.weak	USART0_IRQHandler
	.thumb_set USART0_IRQHandler,Default_Handler

	.weak	USART1_IRQHandler
	.thumb_set USART1_IRQHandler,Default_Handler

	.weak	CEC_IRQHandler
	.thumb_set CEC_IRQHandler,Default_Handler

	.weak	I2C0_ER_IRQHandler
	.thumb_set I2C0_ER_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	USBD_LP_IRQHandler
	.thumb_set USBD_LP_IRQHandler,Default_Handler

	.weak	USBD_HP_IRQHandler
	.thumb_set USBD_HP_IRQHandler,Default_Handler

	.weak	USBDWakeUp_IRQHandler
	.thumb_set USBDWakeUp_IRQHandler,Default_Handler

	.weak	CAN0_TX_IRQHandler
	.thumb_set CAN0_TX_IRQHandler,Default_Handler

	.weak	CAN0_RX0_IRQHandler
	.thumb_set CAN0_RX0_IRQHandler,Default_Handler

	.weak	CAN0_RX1_IRQHandler
	.thumb_set CAN0_RX1_IRQHandler,Default_Handler

	.weak	CAN0_SCE_IRQHandler
	.thumb_set CAN0_SCE_IRQHandler,Default_Handler

	.weak	SLCD_IRQHandler
	.thumb_set SLCD_IRQHandler,Default_Handler
	
	.weak	DMA_Channel5_6_IRQHandler
	.thumb_set DMA_Channel5_6_IRQHandler,Default_Handler

	.weak	SPI2_IRQHandler
	.thumb_set SPI2_IRQHandler,Default_Handler

	.weak	CAN1_TX_IRQHandler
	.thumb_set CAN1_TX_IRQHandler,Default_Handler
	
	.weak	CAN1_RX0_IRQHandler
	.thumb_set 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
