STM32F103R8T6 串口3 能发送但不能进行中断接收是什么问题？

只看该作者 · 2015-4-3 11:26

如题：
主程序如下
int main(void)
{
#ifdef DEBUG
debug();
#endif
/* System Clocks Configuration */
RCC_Configuration();
GPIO_Configuration();
NVIC_Configuration();
USART3_Configuration();
TIM_Configuration();
TIM1_Configuration();
GPIO_Deint();
TXD_EXTENSION_ADDRESS = READ_adderss();
GPIO_WriteBit(GPIOB, GPIO_Pin_5, Bit_RESET); //LED1  LIGHT
RX_485;
while(1)
{
//Send_DATA_RS485();
}
}

中断程序如下
void USART3_IRQHandler(void)
{
if(USART_GetITStatus(USART3, USART_IT_RXNE) == SET)
      {
      USART_ClearITPendingBit(USART3,USART_IT_RXNE);
GPIO_WriteBit(GPIOD, GPIO_Pin_2, Bit_RESET); //LED1  LIGHT
      RXDBUFFER[RxBufferSize_connter] = USART_ReceiveData(USART3);
      RxBufferSize_connter = RxBufferSize_connter + 1;
      if(RxBufferSize_connter == 26)
RxBufferSize_connter = 0;
      if((RXDBUFFER[5] == 0XFF) && (RXDBUFFER[6] == 0X55) && (RXDBUFFER[7] == 0X5A)
         && (RXDBUFFER[8] == 0XA5) && (RXDBUFFER[9] == 0XAA) && (RXDBUFFER[11] == 0X90))
         {
            RXD_FLAG = 1;
   GPIO_WriteBit(GPIOD, GPIO_Pin_2, Bit_SET); //LED1  LIGHT
         }
      }
}

usart3配置如下
USART_InitTypeDef USART_InitStructure;

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;

/* Configure the USARTx */
USART_Init(USART3, &USART_InitStructure);

/* Enable the USART Receive interrupt: this interrupt is generated when the USARTx receive data register is not empty */
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);

/* Enable USARTx */
USART_Cmd(USART3, ENABLE);

nvic 如下
NVIC_InitTypeDef NVIC_InitStructure;
#ifdef  VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else  /* VECT_TAB_FLASH  */
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif

/* Configure the NVIC Preemption Priority Bits */

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQChannel;//TIM1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;//TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQChannel;//TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQChannel;//TIM4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

rcc 如下
ErrorStatus HSEStartUpStatus;

/* RCC system reset(for debug purpose) */
RCC_DeInit();

/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();

if(HSEStartUpStatus == SUCCESS)
{
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);

/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);

/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);

/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

/* Enable PLL */
RCC_PLLCmd(ENABLE);

/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}

/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}

/*Enble GPIOA、GPIOB、GPIOC、GPIOD*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB
| RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD
| RCC_APB2Periph_TIM1,
ENABLE);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 | RCC_APB1Periph_TIM3
| RCC_APB1Periph_TIM4 | RCC_APB1Periph_USART3,
ENABLE);

gpio配置如下
/*Configure PB10  as output for  USART3_TXD; RS485_TXD*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 ;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);

/*Configure PB11  as input for  USART3_RXD; RS485_RXD*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);

/*Configure PB12  as output for  USART3_DIR; RS485_DIR*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 ;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);

请高手指点！！