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一、代码编写

1. keil中某个文件无法修改

keil中某个文件无法修改，不能输入_keil5 h文件无法修改-CSDN博客

2.编译报错declaration may not appear after executable statement in block

STM32常见错误error: #268: declaration may not appear after executable statement in block_stm32 declaration may not appear after executable -CSDN博客

3.编译报错Undefined symbol

Keil:Undefined symbol ......(referred from......)_keil undefined symbol-CSDN博客

4.数据类型u8

uint_8=u8=unsigned char无符号八位数字（一个字节）

typedef unsigned char u8;

5.

6.

 

二、外接模块

1.ESP8266固件下载

乐鑫ESP8266烧录固件、升级最新固件、刷MQTT固件_at version:1.7.4.0-CSDN博客

三、烧录之后报错

1.Error:Flash Download Failed-"Cortex-M3"

STM32烧录 Error:Flash Download Failed-“Cortex-M3“ 解决方案—ST-Link调试_flashtarget and try it again.error. flash download-CSDN博客

2.Overlapping of Algorithms at Address 08000000H

STM32下载错误：Overlapping of Algorithms at Address 08000000H错误-CSDN博客