求助103zet6的usart2用不了，附上代码

chenhuee · 发表于 2016-6-4 16:56:28

usart2配置部分代码，我映射到PD上了。死活通信不了，试了几天了都不清，求助大家了
void uart2_init(u32 bound)
{
  GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_USART2,ENABLE);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOD, &GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

USART_InitStructure.USART_BaudRate = bound;
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_Init(USART2, &USART_InitStructure);
  USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
  USART_Cmd(USART2, ENABLE);
}
void USART2_IRQHandler(void)
{
u8 Res;
if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
{
  Res =USART_ReceiveData(USART2);
  USART_SendData(USART2,Res);
  while(USART_GetFlagStatus(USART2,USART_FLAG_TXE)==RESET)
  {
  }
}
}

主函数部分代码

#include "led.h"
#include "delay.h"
#include "key.h"
#include "sys.h"
#include "usart.h"
int main(void)
{
delay_init();
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
uart1_init(9600);
uart2_init(9600);
//uart3_init(9600);
  while(1)
{

}
}