这个模块提供了格式化发送字符串到HC05的功能，占用stm32的串口3
1.头文件
#ifndef __HC_05
#define __HC_05
/*
本模块为HC05蓝牙透传模块，只写了通信，AT指令部分
单独用串口测试
因此本模块基本就是个串口
占用串口USART3
PB10 TX 5v兼容
PB11 RX 5v兼容*/
#include "sys.h"
#define HC05_REC_LEN 100 //定义最大接收字节数 100
#define HC05_TEC_LEN 100 //发送缓存区 100void initHC05(void); //初始化
void sendToHC05(char* fmt ,...);//发送到HC05
static void receiveHandler(void);
static void SendCharToHC05(u8 ch);//私有
extern char HC05_RX_BUF[HC05_REC_LEN];
#endif2.c文件
#include "hc05.h"
#include "stdarg.h"
#include "stdio.h"
#include "delay.h"
#include <string.h>
#include <stdlib.h>
#include "main.h"//PB10 模块RX
//BB11 模块TX
//注意,读取USARTx->SR能避免莫名其妙的错误
char HC05_RX_BUF[HC05_REC_LEN]; //接收缓冲
//接收状态
//bit15， 接收完成标志
//bit14， 接收到0x0d
//bit13~0， 接收到的有效字节数目
u16 HC05_RX_STA=0; //接收状态标记
void initHC05(void){GPIO_InitTypeDef GPIO_InitStructure;USART_InitTypeDef USART_InittStructure;NVIC_InitTypeDef NVIC_InitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);USART_DeInit(USART3);GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //TX复用推挽输出GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //RX浮空输入GPIO_Init(GPIOB, &GPIO_InitStructure);USART_InittStructure.USART_BaudRate = 9600; //波特率USART_InittStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //硬件流设置USART_InittStructure.USART_Mode = USART_Mode_Rx|USART_Mode_Tx; //接收发送模式USART_InittStructure.USART_Parity = USART_Parity_No; //奇偶校验位USART_InittStructure.USART_StopBits = USART_StopBits_1; //停止位USART_InittStructure.USART_WordLength = USART_WordLength_8b; //字长USART_ITConfig(USART3, USART_IT_RXNE, ENABLE); //设置中断类型，接收中断NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn; //串口3中断，在stm32F10x.h中有定义NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级为3NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //响应优先级为3NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能NVIC_Init(&NVIC_InitStructure);USART_Init(USART3, &USART_InittStructure);USART_Cmd(USART3, ENABLE);
}
void USART3_IRQHandler(void)
{u8 Res;if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET){Res =USART_ReceiveData(USART3); //读取接收到的数据if((HC05_RX_STA&0x8000)==0){ //接收未完成if(HC05_RX_STA&0x4000){ //接收到了0x0dif(Res!=0x0a){HC05_RX_STA=0;//接收错误,重新开始}else {//接收完成了HC05_RX_STA|=0x8000;//完成逻辑:printf("recrived: %s",HC05_RX_BUF);receiveHandler();HC05_RX_STA=0;HC05_RX_STA&=~0x8000;//清除完成标志} }else {//还没收到0X0D if(Res==0x0d){HC05_RX_STA|=0x4000;}else {HC05_RX_BUF[HC05_RX_STA&0X3FFF]=Res ;HC05_RX_STA++;if(HC05_RX_STA>(HC05_REC_LEN-1))HC05_RX_STA=0;//接收数据错误,重新开始接收 } }}}
}
//向蓝牙发送一个字节
void SendCharToHC05(u8 ch){ while((USART3->SR&0X40)==0);//等待发送完毕 USART3->DR = ch;
}
//格式化发送到蓝牙
void sendToHC05(char* fmt ,...){unsigned char i,num;char lcd_buf[HC05_TEC_LEN];va_list ap;va_start(ap,fmt); num=vsprintf(lcd_buf,fmt,ap);//printf("num=%d\r\n",num);for(i=0;i<num;i++){SendCharToHC05(lcd_buf[i]);//printf("char=%c\r\n",lcd_buf[i]);}va_end(ap);
}
//接收回调，处理和解析命令
//指令格式：XXXX;arg0;arg1;arg2
void receiveHandler() {//指令表const char* list[] = {"setpid", "restart!", "hello","SetCapBeginFlag","restart"};unsigned char count = 0;double args[3] = {0};char* token;char* cmd;char delim[] = ";";int i;int length = sizeof(list) / sizeof(char*);//先获得命令,';'分割cmd = strtok(HC05_RX_BUF, delim);printf("cmd= %s\r\n", cmd);//然后解析参数，最多3个，解析成doubletoken = strtok(NULL, delim); while (token != NULL && count < 3) {args[count] = atof(token);count++;token = strtok(NULL, delim); }for (i = 0; i < length; i++) {if (strcmp(cmd, list[i]) == 0) break;}//printf("cmd N=%d\r\n",i);//printf("length=%d\r\n",length);//按照解析的命令查找执行if (i < length) {switch (i) {case 0:pid.Kp = args[0];pid.Ki = args[1];pid.Kd = args[2];printf("setpid:p=%f i=%f d=%f\r\n",args[0],args[1],args[2]);savePIDdata();__set_FAULTMASK(1);// 关闭所有中断NVIC_SystemReset();// 复位break;case 1:__set_FAULTMASK(1);// 关闭所有中断NVIC_SystemReset();// 复位printf("cmd%d\r\n", i);break;case 2:printf("cmd%d\r\n", i);printf("hello world\r\n");break;case 3:printf("cmd%d\r\n", i);pauseFlag=0;break;case 4:printf("cmd%d\r\n", i);pauseFlag=1;break;default:break;}}
}IO配置：
PB10 TX 5v兼容
PB11 RX 5v兼容
初始化initHC05()
其中发送可用格式化发送函数sendToHC05，与printf的格式相同
接收需要修改receiveHandler() 函数。接受到数据后会在中断里调用此函数
