[C] 纯文本查看 复制代码void KEY_Init(void)
{
GPIO_InitTypeDef GPIOStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
NVIC_InitTypeDef NVIC_InitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); //
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
GPIOStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIOStructure.GPIO_Pin =GPIO_Pin_11 + GPIO_Pin_12 + GPIO_Pin_13 + GPIO_Pin_14 + GPIO_Pin_15;
GPIOStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_Init(GPIOB, &GPIOStructure);
TIM_DeInit(TIM3);
TIM_TimeBaseInitStruct.TIM_Prescaler = 71;
TIM_TimeBaseInitStruct.TIM_Period = 99;
TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStruct);
TIM_ITConfig(TIM3, TIM_IT_Update|TIM_IT_Trigger, ENABLE);
TIM_Cmd(TIM3, ENABLE);
NVIC_InitStruct.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStruct);
}
上面是按键中断配置。
[C] 纯文本查看 复制代码static void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* 嵌套向量中断控制器组选择 */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
/* 配置USART为中断源 */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
/* 抢断优先级*/
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
/* 子优先级 */
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
/* 使能中断 */
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
/* 初始化配置NVIC */
NVIC_Init(&NVIC_InitStructure);
}
这是串口的中配置。
可是在串口发送数据的时候，按键响应就特别慢。我配置的按键中断优先高于串口发送的中断优先级啊，为什么？
或者有什么好的方法用按键打断串口发送？ |
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