Error[e46]: Undefined external "?V1" referred in AF

在使用协议栈的时候，编译程序总是报这个错，差找了好多文章，发现都是CSDN上的，今天决定写一篇这个错误记录：

第一个错误：

Error[e16]: Segment ISTACK (size: 0xc0 align: 0) is too long for segment definition. At least 0x9 more bytes needed. The problem occurred while processing the segment placement command

版本原因，只需要 Project -> Options -> General Option -> Target，在Target标签中找到“Number of virtual”，原来默认为16，修改为8

第二个错误 

Error[e46]: Undefined external "?V1" referred in AF

该错误是老版本代码在新版本的IAR上运行出现的，只需要替换掉原来的ZStack-CC2530-2.5.1aProjectszstackMainTI2530DB下的chipcon_cstartup.s51文件即可

鉴于很多文章介绍都是在CSDN上下载，其实在官网上也可以下载，然后按照下面步骤来即可

百度网盘下载

链接：https://pan.baidu.com/s/1zOm1BOK56JDwoHMC6ZOFSw
提取码：82qe

首先替换原文件，然后将下列代码（在下载的文件当中也有）插入到该文件末尾，记得删除掉原文件末尾的END

/*******************************************************************************
 *
 * Workaround for missing ?V1,?V2,... when linking. This is normally caused
 * by using an older version of cstartup (pre 8.30) in your project.
 * 
 * Add this file to your project.
 *
 * Copyright 2013 IAR Systems. All rights reserved.
 *
 ******************************************************************************/

;----------------------------------------------------------------;
; Virtual registers						 ;
; =================						 ;
; Below is some segment needed for the IAR ICC C/EC++ compiler   ;
;								 ;
; BREG  : A segment for 8 bit registers for use by the compiler. ;
;         ?B0 is the first register.                             ;
; VREG  : Segment that holds up to 32 virtual registers for      ;
;         use by the compiler. ?V0 is the first register.        ;
; PSP   : Segment containing the PDATA stack pointer (?PSP)      ;
; XSP   : Segment containing the XDATA stack pointer (?XSP)      ;
; 								 ;
;----------------------------------------------------------------;
;----------------------------------------------------------------;

	PROGRAM VIRTUAL_REGISTERS
	PUBLIC  ?B0
	PUBLIC  ?V0
	PUBLIC  ?V1
	PUBLIC  ?V2
	PUBLIC  ?V3
	PUBLIC  ?V4
	PUBLIC  ?V5
	PUBLIC  ?V6
	PUBLIC  ?V7
	PUBLIC  ?V8
	PUBLIC  ?V9
	PUBLIC  ?V10
	PUBLIC  ?V11
	PUBLIC  ?V12
	PUBLIC  ?V13
	PUBLIC  ?V14
	PUBLIC  ?V15
	PUBLIC  ?V16
	PUBLIC  ?V17
	PUBLIC  ?V18
	PUBLIC  ?V19
	PUBLIC  ?V20
	PUBLIC  ?V21
	PUBLIC  ?V22
	PUBLIC  ?V23
	PUBLIC  ?V24
	PUBLIC  ?V25
	PUBLIC  ?V26
	PUBLIC  ?V27
	PUBLIC  ?V28
	PUBLIC  ?V29
	PUBLIC  ?V30
	PUBLIC  ?V31
	PUBLIC  ?PSP
	PUBLIC  ?XSP
	RSEG    BREG:BIT:NOROOT
?B0:
	DS      8

  	RSEG    VREG:DATA:NOROOT
?V0:
	DS      1
?V1:
	DS      1
?V2:
	DS      1
?V3:
	DS      1
?V4:
	DS      1
?V5:
	DS      1
?V6:
	DS      1
?V7:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V7
?V8:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V8
?V9:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V9
?V10:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V10
?V11:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V11
?V12:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V12
?V13:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V13
?V14:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V14
?V15:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V15
?V16:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V16
?V17:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V17
?V18:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V18
?V19:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V19
?V20:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V20
?V21:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V21
?V22:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V22
?V23:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V23
?V24:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V24
?V25:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V25
?V26:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V26
?V27:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V27
?V28:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V28
?V29:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V29
?V30:
	DS      1

  	RSEG    VREG:DATA:NOROOT
  	REQUIRE ?V30
?V31:
	DS      1

	RSEG    PSP:DATA:NOROOT
	EXTERN  ?RESET_PSP
	REQUIRE	?RESET_PSP
?PSP:
	DS      1

	RSEG    XSP:DATA:NOROOT
	EXTERN  ?RESET_XSP
	REQUIRE	?RESET_XSP
?XSP:
	DS      2

	ENDMOD ; VIRTUAL_REGISTERS

	END