;*******************************************************************************
;* File Name          : startup_stm32l021xx.s
;* Author             : MCD Application Team
;* Description        : STM32L021xx Ultra Low Power Devices vector 
;*                      This module performs:
;*                      - Set the initial SP
;*                      - Set the initial PC == _iar_program_start,
;*                      - Set the vector table entries with the exceptions ISR 
;*                        address.
;*                      - Configure the system clock
;*                      - 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
;*
;* Copyright (c) 2016 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.
;*
;*******************************************************************************
;
;
; 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_IRQHandler                 ; PVD through EXTI Line detect
                DCD     RTC_IRQHandler                 ; RTC through EXTI Line
                DCD     FLASH_IRQHandler               ; FLASH
                DCD     RCC_IRQHandler                 ; RCC
                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     0                              ; Reserved
                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_COMP_IRQHandler           ; ADC1, COMP1
                DCD     LPTIM1_IRQHandler              ; LPTIM1
                DCD     0                              ; Reserved
                DCD     TIM2_IRQHandler                ; TIM2
                DCD     0                              ; Reserved
                DCD     0                              ; Reserved
                DCD     0                              ; Reserved
                DCD     0                              ; Reserved
                DCD     TIM21_IRQHandler               ; TIM21
                DCD     0                              ; Reserved
                DCD     0                              ; Reserved
                DCD     I2C1_IRQHandler                ; I2C1
                DCD     0                              ; Reserved     
                DCD     SPI1_IRQHandler                ; SPI1
                DCD     0                              ; Reserved    
                DCD     0                              ; Reserved  
                DCD     USART2_IRQHandler              ; USART2
                DCD     AES_LPUART1_IRQHandler         ; AES and LPUART1
                DCD     0                              ; Reserved    
                DCD     0                              ; Reserved  
                
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; 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 system memory 
        LDR R0,=0x00000004
        LDR R1, [R0]
        LSRS R1, R1, #24
        LDR R2,=0x1F
        CMP R1, R2
        BNE ApplicationStart       
;; SYSCFG clock enable         
        LDR R0,=0x40021034 
        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_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
PVD_IRQHandler
        B PVD_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_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
RCC_IRQHandler
        B RCC_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 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_COMP_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
ADC1_COMP_IRQHandler
        B ADC1_COMP_IRQHandler
        
                 
        PUBWEAK LPTIM1_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
LPTIM1_IRQHandler
        B LPTIM1_IRQHandler
        
                
        PUBWEAK TIM2_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
TIM2_IRQHandler
        B TIM2_IRQHandler
        
        
        PUBWEAK TIM21_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
TIM21_IRQHandler
        B TIM21_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 USART2_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
USART2_IRQHandler
        B USART2_IRQHandler
        
                
        PUBWEAK AES_LPUART1_IRQHandler
        SECTION .text:CODE:NOROOT:REORDER(1)
AES_LPUART1_IRQHandler
        B AES_LPUART1_IRQHandler
        
        END

