我用STM32f030的Usart中断方式为什么始终进不了中断,求高手指点,谢谢!代码如下:
void USART1_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* ʹÄÜAHBʱÖÓ */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB |
RCC_AHBPeriph_GPIOC | RCC_AHBPeriph_GPIOF, ENABLE);
/* ʹÄÜAPB2ʱÖÓ */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
/* ÍâÉèÖÐ¶Ï */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //IRQͨµÀ:´®¿Ú1
NVIC_InitStructure.NVIC_IRQChannelPriority = 1; //ÓÅÏȼ¶ :1¼¶
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //ʹÄÜIRQͨµÀ
NVIC_Init(&NVIC_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_1);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_1);
/* ¶¨ÒåUSART TX_RX Òý½ÅΪ¸´ÓÃÊä³ö */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10; //Òý½Å
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //¸´ÓÃģʽ
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //¸ßËÙ
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //ÍÆÍêÊä³ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //ÉÏÀ
GPIO_Init(GPIOA, &GPIO_InitStructure);
/******************************************************************
USART²ÎÊý³õʼ»¯: ²¨ÌØÂÊ ´«ÊäλÊý ֹͣλÊý УÑéλÊý
9600 8 1 0(NO)
*******************************************************************/
USART_InitStructure.USART_BaudRate = 9600; //É趨´«ÊäËÙÂÊ
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //É趨´«ÊäÊý¾ÝλÊý
USART_InitStructure.USART_StopBits = USART_StopBits_1; //É趨ֹͣλ¸öÊý
USART_InitStructure.USART_Parity = USART_Parity_No ; //²»ÓÃУÑéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//²»ÓÃÁ÷Á¿¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ʹÓýÓÊպͷ¢Ë͹¦ÄÜ
USART_Init(USART1, &USART_InitStructure); //³õʼ»¯USART1
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //ʹÄÜUSART1½ÓÊÕÖжÏ
USART_Cmd(USART1, ENABLE);
/* Clear Transmission complete flag */
USART_ClearFlag(USART1, USART_FLAG_TC);
}
void sInitMCU(void)
{
USART1_Configuration();
}
int main(void)
{
sInitMCU();
while(1)
{
}
}
void USART1_IRQHandler(void)
{
if(USART_GetITStatus(USART1,USART_IT_RXNE) == SET)
{
lubReceiveData = USART_ReceiveData(USART1);
USART_ITConfig(USART1, USART_IT_TC, ENABLE);
USART_SendData(USART1,lubReceiveData);
// USART_ClearITPendingBit(USART1,)
}
if(USART_GetITStatus(USART1,USART_IT_TC) == SET)
{
USART_SendData(USART1,lubReceiveData);
USART_ITConfig(USART1, USART_IT_TC, DISABLE);
USART_ClearITPendingBit(USART1,USART_IT_TC);
}
}
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可参考HAL库的例程;
调试好了,程序没问题 !
谢谢你的回复,程序中有启动中断的,是“USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); ”
RCC_GetClocksFreq(&RCC_Clocks);
开始时钟,
SysTick_Config(RCC_Clocks.HCLK_Frequency / 100000); //内部定时器
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