http://bbs.21ic.com/icview-790448-1-1.html
ST公司提供STM32F0xx的頭文件STM32F0xx.h，編譯器都要定義一個宏：USE_STDPERIPH_DRIVER，如果不定義它 ---- 照ST公司的做法，就會出現問題，如
實際上，打開頭文件研究一下就知道，關係到這個宏的地方只有兩處
第一處是：
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#if !defined USE_STDPERIPH_DRIVER
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/**
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* [url=home.php?mod=space&uid=247401]@brief[/url] Comment the line below if you will not use the peripherals drivers.
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In this case, these drivers will not be included and the application code will
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be based on direct access to peripherals registers
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*/
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/*#define USE_STDPERIPH_DRIVER*/
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#endif /* USE_STDPERIPH_DRIVER */
第二處是：
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第二處是：
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#ifdef USE_STDPERIPH_DRIVER
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#include "stm32f0xx_conf.h"
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#endif
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而stm32f0xx_conf.h頭文件的除了包含所有硬件資源的頭文件外，還包含有一個宏定義：
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#include "stm32f0xx_adc.h"
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#include "stm32f0xx_cec.h"
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#include "stm32f0xx_crc.h"
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……
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/* Exported macro ------------------------------------------------------------*/
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#ifdef USE_FULL_ASSERT
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/**
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* [url=home.php?mod=space&uid=247401]@brief[/url] The assert_param macro is used for function's parameters check.
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* @param expr: If expr is false, it calls assert_failed function which reports
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* the name of the source file and the source line number of the call
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* that failed. If expr is true, it returns no value.
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* @retval None
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*/
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#define assert_param(expr) ((expr) ? (void)0 : assert_failed((uint8_t *)__FILE__, __LINE__))
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/* Exported functions ------------------------------------------------------- */
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void assert_failed(uint8_t* file, uint32_t line);
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#else
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#define assert_param(expr) ((void)0)
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#endif /* USE_FULL_ASSERT */
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