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Ethan Zonca
Refactor of oled driver
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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   <div id="projectname">CMSIS-CORE
   &#160;<span id="projectnumber">Version 3.20</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_&lt;device&gt;.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_&lt;device&gt;.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 &lt;interrupt_name&gt;_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_&lt;Device&gt;.s
; * @brief    CMSIS Cortex-M# Core Device Startup File for
; *           Device &lt;Device&gt;
; * @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.
;   ---------------------------------------------------------------------------*/
;/*
;//-------- &lt;&lt;&lt; Use Configuration Wizard in Context Menu &gt;&gt;&gt; ------------------
;*/


; &lt;h&gt; Stack Configuration
;   &lt;o&gt; Stack Size (in Bytes) &lt;0x0-0xFFFFFFFF:8&gt;
; &lt;/h&gt;

Stack_Size      EQU     0x00000400

                AREA    STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem       SPACE   Stack_Size
__initial_sp


; &lt;h&gt; Heap Configuration
;   &lt;o&gt;  Heap Size (in Bytes) &lt;0x0-0xFFFFFFFF:8&gt;
; &lt;/h&gt;

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     &lt;DeviceInterrupt&gt;_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  &lt;DeviceInterrupt&gt;_IRQHandler         [WEAK]

; ToDo:  Add here the names for the device specific external interrupts handler
&lt;DeviceInterrupt&gt;_IRQHandler
                B       .
                ENDP


                ALIGN


; User Initial Stack &amp; 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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