开了中断可是不知道怎么回事,老进入ISR,我的设置过程如下,请高手帮忙看下问题出在哪里
当执行到下面时,老是进入USART1_IRQHandler();
USART_ITConfig(USART1,USART_IT_TXE,ENABLE);
void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_USART1_S;
NVIC_DeInit();
NVIC_SCBDeInit();
// NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
// NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_ClearIRQChannelPendingBit(USART1_IRQChannel);
NVIC_USART1_S.NVIC_IRQChannel= USART1_IRQChannel;
NVIC_USART1_S.NVIC_IRQChannelPreemptionPriority =3;
NVIC_USART1_S.NVIC_IRQChannelSubPriority=5;
NVIC_USART1_S.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_USART1_S);
}
void SetupUART (void) {
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
/* Enable GPIOA clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
/* Configure USART1 Rx (PA10) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART1 Tx (PA9) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* USART1 configured as follow:
- BaudRate = 115200 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
- USART Clock disabled
- USART CPOL: Clock is active low
- USART CPHA: Data is captured on the middle
- USART LastBit: The clock pulse of the last data bit is not output to
the SCLK pin
*/
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_Clock = USART_Clock_Disable;
USART_InitStructure.USART_CPOL = USART_CPOL_Low;
USART_InitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_InitStructure.USART_LastBit = USART_LastBit_Disable;
USART_Init(USART1, &USART_InitStructure);
//CONFIG USART INTERRPUT //add 2008 8-11 zsf
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
USART_ITConfig(USART1,USART_IT_TXE,ENABLE);
// USART1-> CR1|=0x00a0;
USART_Cmd(USART1, ENABLE); /* Enable USART1 */
}
void USART1_IRQHandler(void)
{
// GPIOB->ODR = (GPIOB->ODR & 0xFFFF00FF) | (LED1 << 8);
/*
if(USART_GetITStatus(USART1, USART_FLAG_RXNE)==SET)
{
USART_ITConfig(USART3, USART_IT_RXNE, DISABLE);
GPIOB->ODR = (GPIOB->ODR & 0xFFFF00FF) | (2 << 8);
Read_Byte=USART_ReceiveData(USART1);
}
if(USART_GetITStatus(USART1, USART_IT_TXE)==SET)
{
// USART_ClearITPendingBit(USART1,USART_IT_TXE);
GPIOB->ODR = (GPIOB->ODR & 0xFFFF00FF) | (1 << 8);
// USART1->DR=0x55;
// USART_SendData(USART1,100);
}
*/
/* If a Frame error is signaled by the card */
if(USART_GetITStatus(USART1, USART_IT_FE) != RESET)
{
USART_ReceiveData(USART1);
/* Resend the byte that failed to be received (by the Smartcard) correctly */
// SC_ParityErrorHandler();
}
/* If the USART3 detects a parity error */
if(USART_GetITStatus(USART1, USART_IT_PE) != RESET)
{
/* Enable USART3 RXNE Interrupt (until receiving the corrupted byte) */
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
/* Flush the USART3 DR register */
USART_ReceiveData(USART1);
}
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
/* Disable USART3 RXNE Interrupt */
USART_ITConfig(USART1, USART_IT_RXNE, DISABLE);
USART_ReceiveData(USART1);
}
/* If a Overrun error is signaled by the card */
if(USART_GetITStatus(USART1, USART_IT_ORE) != RESET)
{
USART_ReceiveData(USART1);
}
/* If a Noise error is signaled by the card */
if(USART_GetITStatus(USART1, USART_IT_NE) != RESET)
{
USART_ReceiveData(USART1);
}
}
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