STM32 定时器库函数，TIM_UpdateRequestConfig，不正确。

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zhurong90s-3151 发布时间：2013-11-11 12:08

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库函数TIM_UpdateRequestConfig用于设置寄存器，有两个参数：
对于这个库函数参数的定义，说明一塌糊涂。
函数的原型如下：
手册原型：
void TIM_UpdateRequestConfig(TIM_TypeDef* TIMx, uint16_t TIM_UpdateSource)
{
/* Check the parameters */
assert_param(IS_TIM_ALL_PERIPH(TIMx));
assert_param(IS_TIM_UPDATE_SOURCE(TIM_UpdateSource));
if (TIM_UpdateSource != TIM_UpdateSource_Global)
{
    /* Set the URS Bit */
    TIMx->CR1 |= TIM_CR1_URS;
}
else
{
    /* Reset the URS Bit */
    TIMx->CR1 &= (uint16_t)~((uint16_t)TIM_CR1_URS);
}
}
库函数原型：
void TIM_UpdateRequestConfig(TIM_TypeDef* TIMx, uint16_t TIM_UpdateSource)
{
/* Check the parameters */
assert_param(IS_TIM_ALL_PERIPH(TIMx));
assert_param(IS_TIM_UPDATE_SOURCE(TIM_UpdateSource));
if (TIM_UpdateSource != TIM_UpdateSource_Global)
{
    /* Set the URS Bit */
    TIMx->CR1 |= TIM_CR1_URS;
}
else
{
    /* Reset the URS Bit */
    TIMx->CR1 &= (uint16_t)~((uint16_t)TIM_CR1_URS);
}
}
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.手册中的参数两个参数解释，反了（stm32f10x_stdperiph_lib_um.chm）：

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. 1 `. C% k. `- ]: M& ]/ v2 a. u, P
TIM_UpdateSource_Global: Source of update is counter overflow/underflow
- B( J% m+ b. Y' Z$ W F

2.库函数定义处的说明同上一样反了。stm32f10x_time.c 第2109行。/**
* @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
                                       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
*/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. */
#define TIM_UpdateSource_Regular           ((uint16_t)0x0001) /*!< Source of update is counter overflow/underflow. */