;*******************************************************************************
;* File Name          : startup_stm32f042x6.s
;* Author             : MCD Application Team
;* Description        : STM32F042x4/STM32F042x6 devices vector table for EWARM toolchain.
;*                      This module performs:
;*                      - Set the initial SP
;*                      - Set the initial PC == __iar_program_start,
;*                      - 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-M0 processor is in Thread mode,
;*                      priority is Privileged, and the Stack is set to Main.
;*******************************************************************************
;* @attention
;*
;* <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
;* All rights reserved.</center></h2>
;*
;* 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:
;*                        opensource.org/licenses/BSD-3-Clause
;*
;*******************************************************************************
;
;
; The modules in this file are included in the libraries, and may be replaced
; by any user-defined modules that define the PUBLIC symbol _program_start or
; a user defined start symbol.
; To override the cstartup defined in the library, simply add your modified
; version to the workbench project.
;
; The vector table is normally located at address 0.
; When debugging in RAM, it can be located in RAM, aligned to at least 2^6.
; The name "__vector_table" has special meaning for C-SPY:
; it is where the SP start value is found, and the NVIC vector
; table register (VTOR) is initialized to this address if != 0.
;
; Cortex-M version
;

        MODULE  ?cstartup

        ;; Forward declaration of sections.
        SECTION CSTACK:DATA:NOROOT(3)

        SECTION .intvec:CODE:NOROOT(2)

        EXTERN  __iar_program_start
        EXTERN  SystemInit
        PUBLIC  __vector_table

        DATA
__vector_table
        DCD     sfe(CSTACK)
        DCD     Reset_Handler                  ; Reset Handler

        DCD     NMI_Handler                    ; NMI Handler
        DCD     HardFault_Handler              ; Hard Fault Handler
        DCD     0                              ; Reserved
        DCD     0                              ; Reserved
        DCD     0                              ; Reserved
        DCD     0                              ; Reserved
        DCD     0                              ; Reserved
        DCD     0                              ; Reserved
        DCD     0                              ; Reserved
        DCD     SVC_Handler                    ; SVCall Handler
        DCD     0                              ; Reserved
        DCD     0                              ; Reserved
        DCD     PendSV_Handler                 ; PendSV Handler
        DCD     SysTick_Handler                ; SysTick Handler

        ; External Interrupts
        DCD     WWDG_IRQHandler                ; Window Watchdog
        DCD     PVD_VDDIO2_IRQHandler          ; PVD and VDDIO2 through EXTI Line detect
        DCD     RTC_IRQHandler                 ; RTC through EXTI Line
        DCD     FLASH_IRQHandler               ; FLASH
        DCD     RCC_CRS_IRQHandler             ; RCC and CRS
        DCD     EXTI0_1_IRQHandler             ; EXTI Line 0 and 1
        DCD     EXTI2_3_IRQHandler             ; EXTI Line 2 and 3
        DCD     EXTI4_15_IRQHandler            ; EXTI Line 4 to 15
        DCD     TSC_IRQHandler                 ; TSC
        DCD     DMA1_Channel1_IRQHandler       ; DMA1 Channel 1
        DCD     DMA1_Channel2_3_IRQHandler     ; DMA1 Channel 2 and Channel 3
        DCD     DMA1_Channel4_5_IRQHandler     ; DMA1 Channel 4 and Channel 5
        DCD     ADC1_IRQHandler                ; ADC1 
        DCD     TIM1_BRK_UP_TRG_COM_IRQHandler ; TIM1 Break, Update, Trigger and Commutation
        DCD     TIM1_CC_IRQHandler             ; TIM1 Capture Compare
        DCD     TIM2_IRQHandler                ; TIM2
        DCD     TIM3_IRQHandler                ; TIM3
        DCD     0                              ; Reserved
        DCD     0                              ; Reserved
        DCD     TIM14_IRQHandler               ; TIM14
        DCD     0                              ; Reserved
        DCD     TIM16_IRQHandler               ; TIM16
        DCD     TIM17_IRQHandler               ; TIM17
        DCD     I2C1_IRQHandler                ; I2C1
        DCD     0                              ; Reserved
        DCD     SPI1_IRQHandler                ; SPI1
        DCD     SPI2_IRQHandler                ; SPI2
        DCD     USART1_IRQHandler              ; USART1
        DCD     USART2_IRQHandler              ; USART2
        DCD     0                              ; Reserved
        DCD     CEC_CAN_IRQHandler             ; CEC and CAN
        DCD     USB_IRQHandler                 ; USB
        
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; Default interrupt handlers.
;;
        THUMB

        PUBWEAK Reset_Handler
        SECTION .text:CODE:NOROOT:REORDER(2)
Reset_Handler

        LDR     R0, =sfe(CSTACK)          ; set stack pointer 
        MSR     MSP, R0 

;;Check if boot space corresponds to test memory 
        LDR R0,=0x00000004
        LDR R1, [R0]
        LSRS R1, R1, #24
        LDR R2,=0x1F
        CMP R1, R2
        
        BNE ApplicationStart       
;; SYSCFG clock enable         
        LDR R0,=0x40021018 
        LDR R1,=0x00000001
        STR R1, [R0]
        
;; Set CFGR1 register with flash memory remap at address 0

        LDR R0,=0x40010000 
        LDR R1,=0x00000000
        STR R1, [R0]
ApplicationStart
        LDR     R0, =SystemInit
        BLX     R0
        LDR     R0, =__iar_program_start
        BX      R0
        
        PUBWEAK NMI_Handler
        SECTION .text:CODE:NOROOT:REORDER(1)
NMI_Handler
        B NMI_Handler

        PUBWEAK HardFault_Handler
        SECTION .text:CODE:NOROOT:REORDER(1)
HardFault_Handler
        B HardFault_Handler

        PUBWEAK SVC_Handler
        SECTION .text:CODE:NOROOT:REORDER(1)
SVC_Handler
        B SVC_Handler

        PUBWEAK PendSV_Handler
        SECTION .text:CODE:NOROOT:REORDER(1)
PendSV_Handler
        B PendSV_Handler

        PUBWEAK SysTick_Handler
        SECTION .text:CODE:NOROOT:REORDER(1)
SysTick_Handler
        B SysTick_Handler

        PUBWEAK WWDG_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
WWDG_IRQHandler
        B WWDG_IRQHandler

        PUBWEAK PVD_VDDIO2_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
PVD_VDDIO2_IRQHandler
        B PVD_VDDIO2_IRQHandler

        PUBWEAK RTC_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
RTC_IRQHandler
        B RTC_IRQHandler

        PUBWEAK FLASH_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
FLASH_IRQHandler
        B FLASH_IRQHandler

        PUBWEAK RCC_CRS_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
RCC_CRS_IRQHandler
        B RCC_CRS_IRQHandler

        PUBWEAK EXTI0_1_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
EXTI0_1_IRQHandler
        B EXTI0_1_IRQHandler

        PUBWEAK EXTI2_3_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
EXTI2_3_IRQHandler
        B EXTI2_3_IRQHandler

        PUBWEAK EXTI4_15_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
EXTI4_15_IRQHandler
        B EXTI4_15_IRQHandler

        PUBWEAK TSC_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
TSC_IRQHandler
        B TSC_IRQHandler

        PUBWEAK DMA1_Channel1_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
DMA1_Channel1_IRQHandler
        B DMA1_Channel1_IRQHandler

        PUBWEAK DMA1_Channel2_3_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
DMA1_Channel2_3_IRQHandler
        B DMA1_Channel2_3_IRQHandler

        PUBWEAK DMA1_Channel4_5_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
DMA1_Channel4_5_IRQHandler
        B DMA1_Channel4_5_IRQHandler

        PUBWEAK ADC1_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
ADC1_IRQHandler
        B ADC1_IRQHandler

        PUBWEAK TIM1_BRK_UP_TRG_COM_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
TIM1_BRK_UP_TRG_COM_IRQHandler
        B TIM1_BRK_UP_TRG_COM_IRQHandler

        PUBWEAK TIM1_CC_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
TIM1_CC_IRQHandler
        B TIM1_CC_IRQHandler

        PUBWEAK TIM2_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
TIM2_IRQHandler
        B TIM2_IRQHandler

        PUBWEAK TIM3_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
TIM3_IRQHandler
        B TIM3_IRQHandler

        PUBWEAK TIM14_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
TIM14_IRQHandler
        B TIM14_IRQHandler

        PUBWEAK TIM16_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
TIM16_IRQHandler
        B TIM16_IRQHandler

        PUBWEAK TIM17_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
TIM17_IRQHandler
        B TIM17_IRQHandler

        PUBWEAK I2C1_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
I2C1_IRQHandler
        B I2C1_IRQHandler

        PUBWEAK SPI1_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
SPI1_IRQHandler
        B SPI1_IRQHandler

        PUBWEAK SPI2_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
SPI2_IRQHandler
        B SPI2_IRQHandler

        PUBWEAK USART1_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
USART1_IRQHandler
        B USART1_IRQHandler

        PUBWEAK USART2_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
USART2_IRQHandler
        B USART2_IRQHandler

        PUBWEAK CEC_CAN_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
CEC_CAN_IRQHandler
        B CEC_CAN_IRQHandler

        PUBWEAK USB_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
USB_IRQHandler
        B USB_IRQHandler
        
        END
;************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE*****