# CmBacktraceFlashLogDemo **Repository Path**: Armink/CmBacktraceFlashLogDemo ## Basic Information - **Project Name**: CmBacktraceFlashLogDemo - **Description**: The CmBacktrace flash log demo base on Pandora IoT Board | 基于潘多拉 IoT 开发板的 CmBacktrace Flash 日志存储示例 - **Primary Language**: C - **License**: Not specified - **Default Branch**: master - **Homepage**: None - **GVP Project**: No ## Statistics - **Stars**: 5 - **Forks**: 5 - **Created**: 2019-12-16 - **Last Updated**: 2024-08-12 ## Categories & Tags **Categories**: Uncategorized **Tags**: None ## README # 示例：CmBacktrace 自动备份异常日志至文件 ## 介绍 本示例主要演示 CmBacktrace 软件包的自带的异常日志保存功能。该功能可以再系统发现异常的时，自动保存日志至异常日志分区，待下次重启后，自动恢复异常日志至文件中。方便开发者记录并分析上次出错的原因。 - **测试平台**：潘多拉 IoT Board - **依赖组件&软件包**：DFS 、FAL - **异常日志保存分区**：位于片上 Flash 的 `cmb_log` 分区 - **异常日志恢复文件路径**：`/log/cmb.log` ，文件系统位于板载的 SPI Flash ## 功能演示 ## STEP 1 将项目导入 RT-Thread Studio 或者打开 MDK5 工程，这里推荐使用 RT-Thread Studio 打开。 打开项目后，编译并下载程序至潘多拉开发板 ### STEP 2 检查启动日志，比如分区表信息。 启动成功后，在 MSH 命令行中新建 `log` 文件夹 ```shell msh />mkdir log ``` ### STEP 3 输入下面的命令，模拟触发 Hardfault 异常 ```shell msh />cmb_test DIVBYZERO ``` ### STEP 4 重启开发板，可以看到如下类似如下日志： ```shell [1116] I/cmb_log: An CmBacktrace log was found on flash. Now will backup it to file (/log/cmb.log). [1149] I/cmb_log: Backup the CmBacktrace flash log to file (/log/cmb.log) successful. ``` 说明异常日志已经成功地恢复至文件中 使用 `cat` 即可查看异常文件内容 ```shell msh />cat log/cmb.log [3082] E/cmb: [3082] E/cmb: Firmware name: rtthread, hardware version: 1.0, software version: 1.0 [3082] E/cmb: Fault on thread tshell [3082] E/cmb: ===== Thread stack information ===== [3082] E/cmb: addr: 20004198 data: 00000000 [3082] E/cmb: addr: 2000419c data: 00000000 [3082] E/cmb: addr: 200041a0 data: 00000000 [3082] E/cmb: addr: 200041a4 data: 00000000 [3082] E/cmb: addr: 200041a8 data: 00000000 [3082] E/cmb: addr: 200041ac data: 00000000 [3082] E/cmb: addr: 200041b0 data: 00000000 [3082] E/cmb: addr: 200041b4 data: 00000002 [3082] E/cmb: addr: 200041b8 data: 08016fb1 [3082] E/cmb: addr: 200041bc data: 00000008 [3082] E/cmb: addr: 200041c0 data: 200041c8 [3082] E/cmb: addr: 200041c4 data: 08006a95 [3082] E/cmb: addr: 200041c8 data: 00000012 [3082] E/cmb: addr: 200041cc data: 20003122 [3082] E/cmb: addr: 200041d0 data: 0801eef4 [3082] E/cmb: addr: 200041d4 data: 20003134 [3082] E/cmb: addr: 200041d8 data: 200041e0 [3082] E/cmb: addr: 200041dc data: 08007d81 [3082] E/cmb: addr: 200041e0 data: deadbeef [3082] E/cmb: addr: 200041e4 data: 00000000 [3082] E/cmb: addr: 200041e8 data: deadbeef [3082] E/cmb: addr: 200041ec data: 0000000d [3082] E/cmb: addr: 200041f0 data: 200011e8 [3082] E/cmb: addr: 200041f4 data: 00000000 [3082] E/cmb: addr: 200041f8 data: 00000000 [3082] E/cmb: addr: 200041fc data: 00000003 [3082] E/cmb: addr: 20004200 data: deadbeef [3082] E/cmb: addr: 20004204 data: deadbeef [3082] E/cmb: addr: 20004208 data: deadbeef [3082] E/cmb: addr: 2000420c data: 080038f9 [3082] E/cmb: addr: 20004210 data: 23232323 [3082] E/cmb: ==================================== [3082] E/cmb: =================== Registers information ==================== [3082] E/cmb: R0 : 00000000 R1 : 08022190 R2 : 0000000a R3 : 00000000 [3082] E/cmb: R12: 00000000 LR : 08016fdd PC : 08016ffa PSR: 61000000 [3082] E/cmb: ============================================================== [3082] E/cmb: Usage fault is caused by Indicates a divide by zero has taken place (can be set only if DIV_0_TRP is set) [3082] E/cmb: Show more call stack info by run: addr2line -e rtthread.elf -a -f 08016ffa 08016fd9 08016fad 08006a91 08007d7d 080038f5 [3082] E/cmb: Current system tick: 3082 msh /> ``` 更多 CmBacktrace 软件包的使用说明，请查看其软件包介绍： http://packages.rt-thread.org/detail.html?package=CmBacktrace