我只想用USART3控制蓝牙的TXD,RXD口,不用KEY和LED,然后用
手机蓝牙助手和蓝牙模块相连,从手机发送了一信息到蓝牙模块,然后可以显示到电脑XCOM上面。代码如下:
#include "delay.h"
#include "usart2.h"
#include "sys.h"
#include "
STM32f10x_
tim.h"
__align(8) u8 USART3_TX_BUF[USART3_MAX_SEND_LEN]; //发送缓冲,最大USART2_MAX_SEND_LEN字节
#ifdef USART3_RX_EN //如果使能了接收
//串口接收缓存区
u8 USART3_RX_BUF[USART3_MAX_RECV_LEN]; //接收缓冲,最大USART2_MAX_RECV_LEN个字节.
#endif
u16 USART3_RX_STA=0;
void USART3_Init(u32 pclk1,u32 bound)
{
//GPIO端口设置
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
//RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART3|RCC_APB2Periph_GPIOB, ENABLE);//使能USART1,GPIOA时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
//USART1_TX
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽输出
GPIO_Init(GPIOB, &GPIO_InitStructure);
//USART1_RX
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
GPIO_Init(GPIOB, &GPIO_InitStructure);
//Usart1 NVIC 配置
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;//子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//IRQ通道使能
NVIC_Init(&NVIC_InitStructure);//根据指定的参数初始化VIC寄存器
//USART 初始化设置
USART_InitStructure.USART_BaudRate = bound;//蓝牙一般设置为38400;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//收发模式
USART_Init(USART3, &USART_InitStructure); //初始化串口
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//开启中断
USART_Cmd(USART3, ENABLE);
}
void USART3_IRQHandler(void)
{
u8 res;
if(USART3->SR&(1<<5))//接收到数据
{
res=USART3->DR;
if(USART3_RX_STA
{
TIM4->CNT=0; //计数器清空
if(USART3_RX_STA==0)TIM4_Set(1); //使能定时器4的中断
USART3_RX_BUF[USART3_RX_STA++]=res;//记录接收到的值
}else
{
USART3_RX_STA|=1<<15;//强制标记接收完成
}
}
}
void TIM4_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); //时钟使能
//定时器TIM3初始化
TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位
TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE ); //使能指定的TIM4中断,允许更新中断
//中断优先级NVIC设置
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn; //TIM4中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3; //先占优先级3级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级3级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure); //初始化NVIC寄存器
TIM_Cmd(TIM4, ENABLE); //使能TIMx
}
void TIM4_IRQHandler(void) //TIM4中断
{
if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET)
{
TIM_ClearITPendingBit(TIM4, TIM_IT_Update ); //清除TIMx更新中断标志
}
}
void TIM4_Set(u8 sta)
{
if(sta)
{
TIM4->CNT=0; //计数器清空
TIM4->CR1|=1<<0; //使能定时器4
}else TIM4->CR1&=~(1<<0);//关闭定时器4
}
void Send_HC05(u16 data)
{
USART3->DR=data;
while((USART3_RX_STA&0x40)==0);
}
u8 Receive_HC05(void)
{
u8 temp;
if((USART3_RX_STA&0x20)==0)
temp=USART3->DR;
return temp;
}
//u8 HC05_Init(void)
//{
//u8 retry=10,t;
//u8 temp=1;
//RCC->APB2ENR|=1<<2; //使能PORTA时钟
//RCC->APB2ENR|=1<<4; //使能PORTC时钟
// GPIOA->CRL&=0XFFF0FFFF;//PA4,输入
// GPIOA->CRL|=0X00080000;
//GPIOA->ODR|=1<<4; //PA4上拉
//GPIOC->CRL&=0XFFF0FFFF;//PC4,推挽输出
//GPIOC->CRL|=0X00030000;
//GPIOC->ODR|=1<<4; //PC4输出1
//USART3_Init(36,9600);//初始化串口2为:9600,波特率.
//while(retry--)
//{
//HC05_KEY=1;//KEY置高,进入AT模式
//delay_ms(10);
//u2_printf("AT\r\n");//发送AT测试指令
//HC05_KEY=0;//KEY拉低,退出AT模式
//for(t=0;t<10;t++) //最长等待50ms,来接收HC05模块的回应
//{
//if(USART3_RX_STA&0X8000)break;
//delay_ms(5);
//}
//if(USART3_RX_STA&0X8000)//接收到一次数据了
//{
//temp=USART3_RX_STA&0X7FFF;//得到数据长度
//USART3_RX_STA=0;
//if(temp==4&&USART3_RX_BUF[0]=='O'&&USART3_RX_BUF[1]=='K')
//{
//temp=0;//接收到OK响应
//break;
//}
//}
//}
//if(retry==0)temp=1;//检测失败
//return temp;
//}
////获取ATK-HC05模块的角色
////返回值:0,从机;1,主机;0XFF,获取失败.
//u8 HC05_Get_Role(void)
//{
//u8 retry=0X0F;
//u8 temp,t;
//while(retry--)
//{
//HC05_KEY=1;//KEY置高,进入AT模式
//delay_ms(10);
//u2_printf("AT+ROLE?\r\n");//查询角色
//for(t=0;t<20;t++) //最长等待200ms,来接收HC05模块的回应
//{
//delay_ms(10);
//if(USART3_RX_STA&0X8000)break;
//}
//HC05_KEY=0;//KEY拉低,退出AT模式
//if(USART3_RX_STA&0X8000)//接收到一次数据了
//{
//temp=USART3_RX_STA&0X7FFF;//得到数据长度
//USART3_RX_STA=0;
//if(temp==13&&USART3_RX_BUF[0]=='+')//接收到正确的应答了
//{
//temp=USART3_RX_BUF[6]-'0';//得到主从模式值
//break;
//}
//}
//}
//if(retry==0)temp=0XFF;//查询失败.
//return temp;
//}
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