蓝牙串口配置.c文件
#include "usart.h"
void usart_config(void)
{
/*1、打开GPIO，AFIO，USART1的时钟*/
RCC_APB2PeriphClockCmd( RCC_APB2Periph_USART1 |RCC_APB2Periph_GPIOA \
| RCC_APB2Periph_AFIO, ENABLE);
/*2\初始化相应的串口引脚*/
usart_release_gpio_init();
/*3、配置串口中断*/
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为复用推挽输出*/
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为浮空输入*/
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); //清除发送完成标志位
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; //设置串口 1 中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级为 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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