请教二个库函数的区别？？？

只看该作者 · 2012-2-25 15:48

我看不出这二个库函数有什么区别？？请各位专家给与指导：
/**

库函数3.4版:
EXTI_ClearFlag;
00203
* @brief
Clears the EXTI?s line pending flags.00204
* @param
EXTI_Line: specifies the EXTI lines flags to clear.00205
*
This parameter can be any combination of EXTI_Linex where x can be (0..19).00206
* @retval None00207
*/00208 void EXTI_ClearFlag(uint32_t EXTI_Line)00209 {00210
/* Check the parameters */00211
assert_param(IS_EXTI_LINE(EXTI_Line));00212
00213
EXTI->PR = EXTI_Line; 指它***************，00214 }
/**
库函数3.4版: EXTI_ClearITPendingBit;
00243
* @brief
Clears the EXTI?s line pending bits.00244
* @param
EXTI_Line: specifies the EXTI lines to clear.00245
*
This parameter can be any combination of EXTI_Linex where x can be (0..19).00246
* @retval None00247
*/00248 void EXTI_ClearITPendingBit(uint32_t EXTI_Line)00249 {00250
/* Check the parameters */00251
assert_param(IS_EXTI_LINE(EXTI_Line));00252
00253
EXTI->PR = EXTI_Line;
这个表达式和上边的函数一样,怎么回事
??????????
00254 } 我试了一下：
我原来的程序是这样的：

EXTI_ClearITPendingBit(EXTI_Line11);

EXTI_ClearFlag(EXTI_Line11);
只用这一个原函数也可以：
EXTI->PR = EXTI_Line11;

是ST的库函数表达的有问题吗？？？？？？？？？？？？？

只看该作者 · 2012-2-25 17:02

楼主的贴子没有可读性，

1.代表不要使用全角字符
2.注意代码格式
3.在BBS发贴时，代码请加code标签。

只看该作者 · 2012-2-25 17:37

重发一遍，

/**

库函数3.4版:
EXTI_ClearFlag;

* @brief
Clears the EXTI?s line pending flags.
* @param
EXTI_Line: specifies the EXTI lines flags to clear.
*
This parameter can be any combination of EXTI_Linex where x can be (0..19).
* @retval None
*/void EXTI_ClearFlag(uint32_t EXTI_Line){
/* Check the parameters */ assert_param(IS_EXTI_LINE(EXTI_Line));

EXTI->;PR = EXTI_Line;}

/**
库函数3.4版: EXTI_ClearITPendingBit;

* @brief
Clears the EXTI?s line pending bits.
* @param
EXTI_Line: specifies the EXTI lines to clear.
*
This parameter can be any combination of EXTI_Linex where x can be (0..19).
* @retval None
*/void EXTI_ClearITPendingBit(uint32_t EXTI_Line){
/* Check the parameters */ assert_param(IS_EXTI_LINE(EXTI_Line)); EXTI->;PR = EXTI_Line;

这个表达式和上边的函数一样,怎么回事
??????????
}
我试了一下：
我原来的程序是这样的：
EXTI_ClearITPendingBit(EXTI_Line11);
EXTI_ClearFlag(EXTI_Line11);
只用这一个原函数也可以：
EXTI->R = EXTI_Line11;
程序也执行正常。
是ST的库函数表达的有问题吗？？？
？？？？？？

只看该作者 · 2012-2-25 18:11

复制

/**

  * @brief  Clears the EXTI抯 line pending bits.

  * @param  EXTI_Line: specifies the EXTI lines to clear.

  *   This parameter can be any combination of EXTI_Linex where x can be (0..19).

  * @retval None

  */

void EXTI_ClearITPendingBit(uint32_t EXTI_Line)

{

  /* Check the parameters */

  assert_param(IS_EXTI_LINE(EXTI_Line));

  

  EXTI->R = EXTI_Line;

}

复制

/**

  * @brief  Clears the EXTI抯 line pending flags.

  * @param  EXTI_Line: specifies the EXTI lines flags to clear.

  *   This parameter can be any combination of EXTI_Linex where x can be (0..19).

  * @retval None

  */

void EXTI_ClearFlag(uint32_t EXTI_Line)

{

  /* Check the parameters */

  assert_param(IS_EXTI_LINE(EXTI_Line));

  

  EXTI->R = EXTI_Line;

}

这样看起来是不是赏心悦目些？