藍牙串口配置

ID:730478 · 發表于 2020-4-16 13:29

藍牙串口配置.c文件

#include "usart.h"

void usart_config(void)
{

/*1、打開GPIO，AFIO，USART1的時鐘*/
RCC_APB2PeriphClockCmd( RCC_APB2Periph_USART1 |RCC_APB2Periph_GPIOA \
                        | RCC_APB2Periph_AFIO, ENABLE);

/*2\初始化相應的串口引腳*/
usart_release_gpio_init();

/*3、配置串口中斷*/
usart_nvic_config();

/*4、配置串口模式*/
usart_para_config();
}
void usart_release_gpio_init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;

/*配置PA9為復用推挽輸出*/
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStruct);

/*配置PA10為浮空輸入*/
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStruct);
}
void usart_para_config(void)
{
USART_InitTypeDef USART_InitStruct;

USART_InitStruct.USART_BaudRate = 9600;
USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStruct.USART_Mode = USART_Mode_Rx;

USART_InitStruct.USART_WordLength = USART_WordLength_8b;  //8
USART_InitStruct.USART_Parity = USART_Parity_No;       //n
USART_InitStruct.USART_StopBits = USART_StopBits_1;    //1

USART_Init(USART1, &USART_InitStruct);

USART_ClearFlag(USART1,USART_FLAG_TC); //清除發送完成標志位
USART_Cmd(USART1, ENABLE); //使能串口 1

USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
}
void usart_nvic_config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //設置串口 1 中斷

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //搶占優先級0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子優先級為 0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能
NVIC_Init(&NVIC_InitStructure);
}

u8 pwml=50,pwmr=50;
void USART1_IRQHandler(void)
{
u8 receive_data;
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
      receive_data = USART_ReceiveData(USART1);
      if(receive_data == 0x0c)
      {
         pwml+=10;
         if(pwml>=50)
         {
            pwml=50;
         }
      }
      if(receive_data == 0x5e)
      {
         pwmr+=10;
         if(pwmr>=50)
         {
            pwmr=50;
         }
      }
      if(receive_data == 0x08)
      {
         pwml-=10;
         if(pwml<=10)
         {
            pwml=10;
         }
      }
      if(receive_data == 0x5a)
      {
         pwmr-=10;
         if(pwmr<=10)
         {
            pwmr=10;
         }
      }
}
USART_ClearITPendingBit(USART1, USART_IT_RXNE);
}

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藍牙串口配置