Error[Pe147]: declaration is incompatible with "__nounwind __interwork __softfp unsigned long __get_PSP(void)" (declared F:\WhenZhouProject\003 总线通讯系统\中继\中继程序\prog\Prog\library\CMSIS\Core\CM3\core_cm3.h 667
1，把老的core_cm3.h去掉，删除，或者改成core_cm3.h.old。
2，Project -> Options -> General Options -> Library Configuration -> Use CMSIS，右下角的选项中选择 use CMSIS
Warning[25]: Label 'SystemInit_ExtMemCtl' is defined pubweak in a section implicitly declared root F:\WhenZhouProject\003 总线通讯系统\中继\中继程序\prog\Prog\library\CMSIS\Core\CM3\startup\iar\startup_stm32f10x_hd.s 53
Warning[25]: Label 'NMI_Handler' is defined pubweak in a section implicitly declared root F:\WhenZhouProject\003 总线通讯系统\中继\中继程序\prog\Prog\library\CMSIS\Core\CM3\startup\iar\startup_stm32f10x_hd.s 233