①..\STM32L1xx_StdPeriph_Driver\src\stm32l1xx_tim.c(2608): warning: #223-D: function "assert_param" declared implicitly
解决：缺少宏：USE_STDPERIPH_DRIVER
②.\Objects\STM32L151RCT6.sct(7): error: L6235E: More than one section matches selector - cannot all be FIRST/LAST.
解决：多个启动文件，关掉一个即可
去掉勾选即可。
③文件出现带钥匙的情形
解决：将文件属性可读去除勾选