求助！串口2中断接收的问题，收不到数据

tutu0214 · 发表于 2018-4-19 11:36:03

void USART2_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
USART_DeInit(USART2);

USART2_IRQHandler();
/* USART2 ê1óÃIO¶Ë¿úÅäÖÃ */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸′óÃíÆíìêä3ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //¸¡¿Õêäèë
  GPIO_Init(GPIOA, &GPIO_InitStructure); //3õê¼»ˉGPIOA

/* USART2 1¤×÷Ä￡ê½ÅäÖÃ */
USART_InitStructure.USART_BaudRate = 115200; //2¨ìØÂêéèÖÃ￡o115200
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //êy¾YÎ»êyéèÖÃ￡o8Î»
USART_InitStructure.USART_StopBits = USART_StopBits_1; //í￡Ö1Î»éèÖÃ￡o1Î»
USART_InitStructure.USART_Parity = USART_Parity_No ;  //êÇ·ñÆæÅ¼D￡Ñé￡oÎT
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //ó2¼tá÷¿ØÖÆÄ￡ê½éèÖÃ￡oÃ»óDê1Äü
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//½óêÕóë·￠Ëí¶¼ê1Äü
USART_Init(USART2, &USART_InitStructure);  //3õê¼»ˉUSART2

USART_Cmd(USART2, ENABLE);// USART2ê1Äü
USART_ITConfig(USART2,USART_FLAG_RXNE,ENABLE);

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3);
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
NVIC_Init(&NVIC_InitStructure);
}
void USART2_IRQHandler(void)
{
u8 ch;
if(USART_GetFlagStatus(USART2, USART_FLAG_RXNE) != RESET)
{
ch=USART_ReceiveData(USART2);
UART2SendByte(ch);
Rx_buf[rev_count++]=ch;
}
}
大家帮忙看看哪边配置的不对，小弟是新手

peng1554 · 发表于 2018-4-19 11:36:04

可以参考下

tutu0214 · 发表于 2018-4-19 11:42:59

自顶1111

jackey · 发表于 2018-4-19 11:44:00

本帖最后由 jackey 于 2018-4-19 11:45 编辑

管脚复用功能的时钟“RCC_APB2Periph_AFIO”没开，而且中断函数“USART2_IRQHandler();”不应该放在主程序中

tutu0214 · 发表于 2018-4-19 11:50:56

还是不行

tutu0214 · 发表于 2018-4-19 13:36:02

jackey · 发表于 2018-4-19 14:00:45

接收中断配置是"USART_ITConfig(UARTx, USART_IT_RXNE, ENABLE);"
再将“void USART2_IRQHandler(void)”整个函数copy到“stm32f10x_it.c”文件中，并在“stm32f10x_it.h”文件中添加“void USART2_IRQHandler(void);”