库函数TIM_UpdateRequestConfig用于设置寄存器，有两个参数：
+ U/ j6 P3 C( h1 `6 _* A5 E对于这个库函数参数的定义，说明一塌糊涂。
  i  D: ~+ O+ t; n函数的原型如下：
( B* Y1 u* S  k4 f手册原型：
+ w, c- J2 c# q% a' Qvoid TIM_UpdateRequestConfig(TIM_TypeDef* TIMx, uint16_t TIM_UpdateSource)
{
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx));
8 K+ D* a+ `7 s" j) Z5 p  assert_param(IS_TIM_UPDATE_SOURCE(TIM_UpdateSource));
! E5 t/ `& {$ q$ {, K2 {8 L" o  if (TIM_UpdateSource != TIM_UpdateSource_Global)
  {
    /* Set the URS Bit */
    TIMx->CR1 |= TIM_CR1_URS;
$ _! R! L9 @, T: D0 B  }
  else
  {
    /* Reset the URS Bit */
0 O0 s8 W6 f* b3 U7 w, `    TIMx->CR1 &= (uint16_t)~((uint16_t)TIM_CR1_URS);
/ V3 a& X; e6 h! B! I7 `  W  }
}
库函数原型：
! ]! e* z& G) u! z9 Zvoid TIM_UpdateRequestConfig(TIM_TypeDef* TIMx, uint16_t TIM_UpdateSource)
{
/ \) V' S  B( D- ]9 d0 ~  /* Check the parameters */
) C9 v- O' o$ w* ]% n% O0 T  J  assert_param(IS_TIM_ALL_PERIPH(TIMx));
5 b8 d5 A4 J6 ?; R. ^  assert_param(IS_TIM_UPDATE_SOURCE(TIM_UpdateSource));
  if (TIM_UpdateSource != TIM_UpdateSource_Global)
) V6 z/ l8 A; w  {
    /* Set the URS Bit */
; s' i8 n0 A2 r5 s( a6 \  b1 c0 L    TIMx->CR1 |= TIM_CR1_URS;
! M: W8 D. ~- u; i' K+ L4 S& k  }
  else
) y3 b" O3 J& B3 G1 e- y  {
    /* Reset the URS Bit */
    TIMx->CR1 &= (uint16_t)~((uint16_t)TIM_CR1_URS);
; D3 k$ D* X7 \# q  z  }
}
各位看官，至于她什么地方一塌糊涂，自己研究。
我说一下，如何正确使用这个函数。
+ {1 X8 p# _; Z3 O1.手册中的参数两个参数解释，反了（stm32f10x_stdperiph_lib_um.chm）：
' g4 g9 g8 M% x

   
& x8 p: i% V+ g/ [# r, B
• TIM_UpdateSource_Regular: Source of update is the counter overflow/underflow or the setting of UG bit, or an update generation through the slave mode controller.   
  
• TIM_UpdateSource_Global: Source of update is counter overflow/underflow
  

 
2 t2 Y& h: h/ ]2.库函数定义处的说明同上一样反了。stm32f10x_time.c 第2109行。/**
" E& r: W4 {( y. O, h4 q; L$ p  * @brief  Configures the TIMx Update Request Interrupt source.
  * @param  TIMx: where x can be 1 to 17 to select the TIM peripheral.
  * @param  TIM_UpdateSource: specifies the Update source.
  *   This parameter can be one of the following values:
  *     @arg TIM_UpdateSource_Regular: Source of update is the counter overflow/underflow
" B5 X' ]0 X& F                                       or the setting of UG bit, or an update generation
                                       through the slave mode controller.
  *     @arg TIM_UpdateSource_Global: Source of update is counter overflow/underflow.
  * @retval None
1 g9 N! w7 O4 b: W' m' `  */3.参数宏定义的说明正确；stm32f10x_time.h 第0806行。#define TIM_UpdateSource_Global            ((uint16_t)0x0000) /*!< Source of update is the counter overflow/underflow
                                                                   or the setting of UG bit, or an update generation
                                                                   through the slave mode controller. */
! P: J) D4 Z6 ^/ t* {, c' n#define TIM_UpdateSource_Regular           ((uint16_t)0x0001) /*!< Source of update is counter overflow/underflow. */ 

谢谢楼主提出的意见。

不错哦，楼主很细心！

楼主研究的很深啊

涨姿势，谢谢楼主！

楼主说的没错，库函数是解释错误了，在头文件中是正确的，但是行数应该是0860行【3.参数宏定义的说明正确；stm32f10x_time.h 第0806行。 】，我的库文件是3.5.0