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usart.c代码(只引用stm32的串口2,串口一用于烧程序)
usart.c代码(只引用stm32的串口2,串口一用于烧程序)
在学习hc-05的过程中,发现csdn的文章对于hc-05模块的使用大多为hc-05与usb转ttl模块的连接使用,而对于有关于hc-05与stm32f1的连接与使用的文章少之又少,于是决定写一篇文章,来帮助在学习hc-05模块遇到问题的朋友们
两块hc-05蓝牙通讯的连接可以参考以下文章:
- #ifndef __USART_H
- #define __USART_H
- #include "stdio.h"
- #include "sys.h"
- #define USART_REC_LEN 200 //定义最大接收字节数 200
- #define EN_USART1_RX 1 //使能(1)/禁止(0)串口1接收
-
- extern u8 USART_RX_BUF[USART_REC_LEN]; //接收缓冲,最大USART_REC_LEN个字节.末字节为换行符
- extern u16 USART_RX_STA; //接收状态标记
-
- void uart_init(u32 bound);
- void uart_init2(u32 bound);
- #endif
-
- void uart_init2(u32 bound){
- //GPIO端口设置
- GPIO_InitTypeDef GPIO_InitStructure;
- USART_InitTypeDef USART_InitStructure;
- NVIC_InitTypeDef NVIC_InitStructure;
-
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能USART1,GPIOA时钟
-
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
- //USART1_TX GPIOA.2
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //PA.2
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
- GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.2
-
- //USART1_RX GPIOA.3初始化
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;//PA10
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
- GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10
-
- //Usart1 NVIC 配置
- NVIC_InitStructure.NVIC_IRQChannel = USART2_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;//串口波特率
- 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(USART2, &USART_InitStructure); //初始化串口2
-
- USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//开启串口接受中断
-
- USART_Cmd(USART2, ENABLE); //使能串口2
-
- }
-
-
-
-
- u8 Rec;
- void USART2_IRQHandler(void) //串口2中断服务程序
- {
- // u8 Rec;
- #if SYSTEM_SUPPORT_OS //如果SYSTEM_SUPPORT_OS为真,则需要支持OS.
- OSIntEnter();
- #endif
- if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) //接收中断(接收到的数据必须是0x0d 0x0a结尾)
- {
- Rec =USART_ReceiveData(USART2); //读取接收到的数据
-
- if((USART_RX_STA&0x8000)==0)//接收未完成
- {
- if(USART_RX_STA&0x4000)//接收到了0x0d
- {
- if(Rec!=0x0a)USART_RX_STA=0;//接收错误,重新开始
- else USART_RX_STA|=0x8000; //接收完成了
- }
- else //还没收到0X0D
- {
- if(Rec==0x0d)USART_RX_STA|=0x4000;
- else
- {
- USART_RX_BUF[USART_RX_STA&0X3FFF]=Rec ;
- USART_RX_STA++;
- if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//接收数据错误,重新开始接收
- }
- }
- }
- }
- #if SYSTEM_SUPPORT_OS //如果SYSTEM_SUPPORT_OS为真,则需要支持OS.
- OSIntExit();
- #endif
- }
-
- extern u8 Rec;
- int main(void)
- {
- // int ss=2;
- delay_init(); //初始化延时函数
- LED_Init(); //初始化LED端口
- uart_init(115200); //串口初始化为115200
- uart_init2(38400);
- while(1)
- {
-
- printf("%d",Rec);
- delay_ms(100);
- if(Rec==1)//检测数据是否传入
- LED0=!LED0;
- }
- }
-
- #ifndef __USART_H
- #define __USART_H
- #include "stdio.h"
- #include "sys.h"
- #define USART_REC_LEN 200 //定义最大接收字节数 200
- #define EN_USART1_RX 1 //使能(1)/禁止(0)串口1接收
-
- extern u8 USART_RX_BUF[USART_REC_LEN]; //接收缓冲,最大USART_REC_LEN个字节.末字节为换行符
- extern u16 USART_RX_STA; //接收状态标记
-
- void uart_init(u32 bound);
- void uart_init2(u32 bound);
- #endif
- void uart_init2(u32 bound){
- //GPIO端口设置
- GPIO_InitTypeDef GPIO_InitStructure;
- USART_InitTypeDef USART_InitStructure;
- NVIC_InitTypeDef NVIC_InitStructure;
-
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能USART1,GPIOA时钟
-
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
- //USART1_TX GPIOA.2
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //PA.2
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
- GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.2
-
- //USART1_RX GPIOA.3初始化
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;//PA10
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
- GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10
-
- //Usart1 NVIC 配置
- NVIC_InitStructure.NVIC_IRQChannel = USART2_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;//串口波特率
- 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(USART2, &USART_InitStructure); //初始化串口2
-
- USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//开启串口接受中断
-
- USART_Cmd(USART2, ENABLE); //使能串口2
-
- }
-
-
-
-
- void USART2_IRQHandler(void) //串口2中断服务程序
- {
- u8 Res;
- #if SYSTEM_SUPPORT_OS //如果SYSTEM_SUPPORT_OS为真,则需要支持OS.
- OSIntEnter();
- #endif
- if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) //接收中断(接收到的数据必须是0x0d 0x0a结尾)
- {
- Res =USART_ReceiveData(USART2); //读取接收到的数据
-
- if((USART_RX_STA&0x8000)==0)//接收未完成
- {
- if(USART_RX_STA&0x4000)//接收到了0x0d
- {
- if(Res!=0x0a)USART_RX_STA=0;//接收错误,重新开始
- else USART_RX_STA|=0x8000; //接收完成了
- }
- else //还没收到0X0D
- {
- if(Res==0x0d)USART_RX_STA|=0x4000;
- else
- {
- USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
- USART_RX_STA++;
- if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//接收数据错误,重新开始接收
- }
- }
- }
- }
- #if SYSTEM_SUPPORT_OS //如果SYSTEM_SUPPORT_OS为真,则需要支持OS.
- OSIntExit();
- #endif
- }
-
- int main(void)
- {
- int ss=2;
- delay_init(); //初始化延时函数
- LED_Init(); //初始化LED端口
- uart_init(115200); //串口初始化为115200
- uart_init2(38400);
- while(1)
- {
-
- USART_SendData(USART2,ss);
- ss++;
- delay_ms(100);
- }
- }
-
两块hc-05各连接两块stm32单片机后,两块hc-05连接之后,打开xcom或其他的一些串口软件,打开两个xcom窗口,收用一个xcom,发用一个xcom。
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