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<title>CMSIS-CORE: Startup File startup_<device>.s</title>
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 <span id="projectnumber">Version 4.30</span>
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<div id="projectbrief">CMSIS-CORE support for Cortex-M processor-based devices</div>
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<div class="title">Startup File startup_<device>.s </div> </div>
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<div class="contents">
<div class="textblock"><p>The <a class="el" href="startup_s_pg.html">Startup File startup_<device>.s</a> contains:</p>
<ul>
<li>The reset handler which is executed after CPU reset and typically calls the <a class="el" href="group__system__init__gr.html#ga93f514700ccf00d08dbdcff7f1224eb2">SystemInit</a> function.</li>
<li>The setup values for the Main Stack Pointer (MSP).</li>
<li>Exception vectors of the Cortex-M Processor with weak functions that implement default routines.</li>
<li>Interrupt vectors that are device specific with weak functions that implement default routines.</li>
</ul>
<p>The file exists for each supported toolchain and is the only tool-chain specific CMSIS file.</p>
<p>To adapt the file to a new device only the interrupt vector table needs to be extended with the device-specific interrupt handlers. The naming convention for the interrupt handler names are <interrupt_name>_IRQHandler. This table needs to be consistent with <a class="el" href="group___n_v_i_c__gr.html#ga7e1129cd8a196f4284d41db3e82ad5c8">IRQn_Type</a> that defines all the IRQ numbers for each interrupt.</p>
<p><b>Example:</b> </p>
<p>The following example shows the extension of the interrupt vector table for the LPC1100 device family.</p>
<div class="fragment"><div class="line"> ; External Interrupts</div>
<div class="line"> DCD WAKEUP0_IRQHandler ; 16+ 0: Wakeup PIO0.0</div>
<div class="line"> DCD WAKEUP1_IRQHandler ; 16+ 1: Wakeup PIO0.1</div>
<div class="line"> DCD WAKEUP2_IRQHandler ; 16+ 2: Wakeup PIO0.2</div>
<div class="line"> : :</div>
<div class="line"> : :</div>
<div class="line"> DCD EINT1_IRQHandler ; 16+30: PIO INT1</div>
<div class="line"> DCD EINT0_IRQHandler ; 16+31: PIO INT0</div>
<div class="line"> : </div>
<div class="line"> :</div>
<div class="line"> EXPORT WAKEUP0_IRQHandler [WEAK]</div>
<div class="line"> EXPORT WAKEUP1_IRQHandler [WEAK]</div>
<div class="line"> EXPORT WAKEUP2_IRQHandler [WEAK]</div>
<div class="line"> : :</div>
<div class="line"> : : </div>
<div class="line"> EXPORT EINT1_IRQHandler [WEAK]</div>
<div class="line"> EXPORT EINT0_IRQHandler [WEAK]</div>
<div class="line"></div>
<div class="line">WAKEUP0_IRQHandler</div>
<div class="line">WAKEUP1_IRQHandler</div>
<div class="line">WAKEUP1_IRQHandler</div>
<div class="line"> :</div>
<div class="line"> :</div>
<div class="line">EINT1_IRQHandler</div>
<div class="line">EINT0_IRQHandler</div>
<div class="line"> B .</div>
</div><!-- fragment --><h1><a class="anchor" id="startup_s_sec"></a>
startup_Device.s Template File</h1>
<p>The <a class="el" href="startup_s_pg.html#startup_s_sec">startup_Device.s Template File</a> for the Cortex-M3 and the ARMCC compiler is shown below. The files for other compiler vendors differ slightly in the syntax, but not in the overall structure.</p>
<pre class="fragment">;/**************************************************************************//**
; * @file startup_<Device>.s
; * @brief CMSIS Cortex-M# Core Device Startup File for
; * Device <Device>
; * @version V3.10
; * @date 23. November 2012
; *
; * @note
; *
; ******************************************************************************/
;/* Copyright (c) 2012 ARM LIMITED
;
; All rights reserved.
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions are met:
; - Redistributions of source code must retain the above copyright
; notice, this list of conditions and the following disclaimer.
; - 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.
; - Neither the name of ARM 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 COPYRIGHT HOLDERS AND 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.
; ---------------------------------------------------------------------------*/
;/*
;//-------- <<< Use Configuration Wizard in Context Menu >>> ------------------
;*/
; <h> Stack Configuration
; <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>
Stack_Size EQU 0x00000400
AREA STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem SPACE Stack_Size
__initial_sp
; <h> Heap Configuration
; <o> Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>
Heap_Size EQU 0x00000100
AREA HEAP, NOINIT, READWRITE, ALIGN=3
__heap_base
Heap_Mem SPACE Heap_Size
__heap_limit
PRESERVE8
THUMB
; Vector Table Mapped to Address 0 at Reset
AREA RESET, DATA, READONLY
EXPORT __Vectors
EXPORT __Vectors_End
EXPORT __Vectors_Size
__Vectors DCD __initial_sp ; Top of Stack
DCD Reset_Handler ; Reset Handler
DCD NMI_Handler ; NMI Handler
DCD HardFault_Handler ; Hard Fault Handler
DCD MemManage_Handler ; MPU Fault Handler
DCD BusFault_Handler ; Bus Fault Handler
DCD UsageFault_Handler ; Usage Fault Handler
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD SVC_Handler ; SVCall Handler
DCD DebugMon_Handler ; Debug Monitor Handler
DCD 0 ; Reserved
DCD PendSV_Handler ; PendSV Handler
DCD SysTick_Handler ; SysTick Handler
; External Interrupts
; ToDo: Add here the vectors for the device specific external interrupts handler
DCD <DeviceInterrupt>_IRQHandler ; 0: Default
__Vectors_End
__Vectors_Size EQU __Vectors_End - __Vectors
AREA |.text|, CODE, READONLY
; Reset Handler
Reset_Handler PROC
EXPORT Reset_Handler [WEAK]
IMPORT SystemInit
IMPORT __main
LDR R0, =SystemInit
BLX R0
LDR R0, =__main
BX R0
ENDP
; Dummy Exception Handlers (infinite loops which can be modified)
NMI_Handler PROC
EXPORT NMI_Handler [WEAK]
B .
ENDP
HardFault_Handler\
PROC
EXPORT HardFault_Handler [WEAK]
B .
ENDP
MemManage_Handler\
PROC
EXPORT MemManage_Handler [WEAK]
B .
ENDP
BusFault_Handler\
PROC
EXPORT BusFault_Handler [WEAK]
B .
ENDP
UsageFault_Handler\
PROC
EXPORT UsageFault_Handler [WEAK]
B .
ENDP
SVC_Handler PROC
EXPORT SVC_Handler [WEAK]
B .
ENDP
DebugMon_Handler\
PROC
EXPORT DebugMon_Handler [WEAK]
B .
ENDP
PendSV_Handler\
PROC
EXPORT PendSV_Handler [WEAK]
B .
ENDP
SysTick_Handler\
PROC
EXPORT SysTick_Handler [WEAK]
B .
ENDP
Default_Handler PROC
; ToDo: Add here the export definition for the device specific external interrupts handler
EXPORT <DeviceInterrupt>_IRQHandler [WEAK]
; ToDo: Add here the names for the device specific external interrupts handler
<DeviceInterrupt>_IRQHandler
B .
ENDP
ALIGN
; User Initial Stack & Heap
IF :DEF:__MICROLIB
EXPORT __initial_sp
EXPORT __heap_base
EXPORT __heap_limit
ELSE
IMPORT __use_two_region_memory
EXPORT __user_initial_stackheap
__user_initial_stackheap PROC
LDR R0, = Heap_Mem
LDR R1, =(Stack_Mem + Stack_Size)
LDR R2, = (Heap_Mem + Heap_Size)
LDR R3, = Stack_Mem
BX LR
ENDP
ALIGN
ENDIF
END
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