K60 启动过程分析

2019-04-14 21:05发布

站内文章 / 模拟电子
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  挺高兴的老师借了我一块K60的开发板，趁着暑假好好鼓捣鼓捣！                 有了上图的过程分析我想心里大概有个低了吧！ 下面看代码： /* CodeWarrior ARM Runtime Support Library * Copyright �2012 Freescale Semiconductors. All rights reserved. * * $Date: 2013/02/08 07:14:44 $ * $Revision: 1.6 $ */ /* * __arm_start.c - entry-point for ARM programs * */ #include #include #include _EWL_BEGIN_EXTERN_C #if SUPPORT_SEMIHOST_ARGC_ARGV #define __MAX_CMDLINE_ARGS 10 static char *argv[__MAX_CMDLINE_ARGS] = { 0 }; #else static char *argv[] = { 0 }; #endif #if __GNUC__ #define __call_static_initializers __init_cpp #endif #if SUPPORT_SEMIHOST_ARGC_ARGV extern int __argc_argv(int, char **); #endif /* SUPPORT_SEMIHOST_ARGC_ARGV */ extern void __call_static_initializers(void); extern int main(int, char **); #ifdef __VFPV4__ extern void __fp_init(void); #endif /* __VFPV4__ */ extern void __init_registers(); extern void __init_hardware(); extern void __init_user(); #if defined(__APCS_ROPI) extern void __init_pic(); #endif #if defined(__APCS_RWPI) extern void __init_pid(); #endif #if defined(__APCS_ROPI) || defined(__APCS_RWPI) extern void __load_static_base(); #endif #if defined(__SEMIHOSTING) extern void __init_semihost(void) _EWL_WEAK; #endif #if SUPPORT_ROM_TO_RAM extern void __copy_rom_sections_to_ram(void); extern char __S_romp[]; #endif static void zero_fill_bss(void) { extern char __START_BSS[]; extern char __END_BSS[]; memset(__START_BSS, 0, (__END_BSS - __START_BSS)); } #ifndef __thumb // Thumb version #error Thumb startup #endif // To keep iar debugger happy void __iar_program_start(void) _EWL_NAKED; void __thumb_startup(void); void __iar_program_start() { __thumb_startup(); } void __thumb_startup(void) _EWL_NAKED; void __thumb_startup(void) { // Setup registers __init_registers(); // setup hardware __init_hardware(); #if defined(__APCS_ROPI) || defined(__APCS_RWPI) // static base register initialization __load_static_base(); #endif #if defined(__APCS_RWPI) // -pid // setup static base for SB relative position independent data // perform runtime relocation __init_pid(); #endif #if defined(__APCS_ROPI) // -pic // perform runtime relocation for position independent code __init_pic(); #endif // zero-fill the .bss section zero_fill_bss(); #if SUPPORT_ROM_TO_RAM if (__S_romp != 0L) __copy_rom_sections_to_ram(); #endif // initialize the floating-point library #ifdef __VFPV4__ __fp_init(); #endif // call C++ static initializers __call_static_initializers(); // initializations before main, user specific __init_user(); #if defined(__SEMIHOSTING) // semihost initializations __init_semihost(); #endif // call main(argc, &argv) #if SUPPORT_SEMIHOST_ARGC_ARGV exit(main(__argc_argv(__MAX_CMDLINE_ARGS, argv), argv)); #else exit(main(0, argv)); #endif // should never get here while (1); } _EWL_END_EXTERN_C
  封尘浪用的库为 苏州大学 的库这两天一直在移植，各种问题，总体来说苏州的库还是不错的，就是资料有点少，这个暑假准备拿下K60，（鸭梨山大）好了，有时间在把学习过程与大家共享！同时欢迎各位一起交流探讨，解决问题！

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