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我想问一下这个函数具体有什么用?
void bsp_StartHardTimer(uint8_t _CC, uint32_t _uiTimeOut, void * _pCallBack)
{
uint32_t cnt_now;
uint32_t cnt_tar;
/*
执行下面这个语句,时长 = 18us (通过逻辑分析仪测量IO翻转)
bsp_StartTimer2(3, 500, (void *)test1);
*/
if (_uiTimeOut < 5)
{
;
}
else
{
_uiTimeOut -= 5;
}
cnt_now = TIM_GetCounter(TIM_HARD); /* 读取当前的计数器值 */
cnt_tar = cnt_now + _uiTimeOut; /* 计算捕获的计数器值 */
if (_CC == 1)
{
s_TIM_CallBack1 = (void (*)(void))_pCallBack;
TIM_SetCompare1(TIM_HARD, cnt_tar); /* 设置捕获比较计数器CC1 */
TIM_ClearITPendingBit(TIM_HARD, TIM_IT_CC1);
TIM_ITConfig(TIM_HARD, TIM_IT_CC1, ENABLE); /* 使能CC1中断 */
}
else if (_CC == 2)
{
s_TIM_CallBack2 = (void (*)(void))_pCallBack;
TIM_SetCompare2(TIM_HARD, cnt_tar); /* 设置捕获比较计数器CC2 */
TIM_ClearITPendingBit(TIM_HARD, TIM_IT_CC2);
TIM_ITConfig(TIM_HARD, TIM_IT_CC2, ENABLE); /* 使能CC2中断 */
}
else if (_CC == 3)
{
s_TIM_CallBack3 = (void (*)(void))_pCallBack;
TIM_SetCompare3(TIM_HARD, cnt_tar); /* 设置捕获比较计数器CC3 */
TIM_ClearITPendingBit(TIM_HARD, TIM_IT_CC3);
TIM_ITConfig(TIM_HARD, TIM_IT_CC3, ENABLE); /* 使能CC3中断 */
}
else if (_CC == 4)
{
s_TIM_CallBack4 = (void (*)(void))_pCallBack;
TIM_SetCompare4(TIM_HARD, cnt_tar); /* 设置捕获比较计数器CC4 */
TIM_ClearITPendingBit(TIM_HARD, TIM_IT_CC4);
TIM_ITConfig(TIM_HARD, TIM_IT_CC4, ENABLE); /* 使能CC4中断 */
}
else
{
return;
}
} |
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