一，LED状态
二，蓝牙模块有两种通信模式
1，AT指令模式
2，数据透传模式
三、AT指令程序设计
1、设置模块的名字
void usart3_send_str(char *pbuf){while(pbuf && *pbuf){USART_SendData(USART3,*pbuf++);while(USART_GetFlagStatus(USART3,USART_FLAG_TXE)==RESET);}}void ble_set_config(void){//配置模块的名字usart3_send_str("AT+NAMETeacher.Wen\r\n");delay_ms(500);}
#include "stm32f4xx.h"#include "stm32f4xx_gpio.h"#include "stm32f4xx_rcc.h"#include "stm32f4xx_usart.h"#include "stdio.h"static GPIO_InitTypeDefGPIO_InitStructure;static USART_InitTypeDefUSART_InitStructure;static NVIC_InitTypeDefNVIC_InitStructure; void delay_us(uint32_t nus){ uint32_t temp; SysTick->LOAD =SystemCoreClock/8/1000000*nus;//时间加载SysTick->VAL =0x00; //清空计数器SysTick->CTRL|=SysTick_CTRL_ENABLE_Msk ; //使能滴答定时器开始倒数do{temp=SysTick->CTRL;}while((temp&0x01)&&!(temp&(1<<16))); //等待时间到达 SysTick->CTRL&=~SysTick_CTRL_ENABLE_Msk; //关闭计数器SysTick->VAL =0X00; //清空计数器 }void delay_ms(uint16_t nms){ uint32_t temp; SysTick->LOAD=SystemCoreClock/8/1000*nms; //时间加载(SysTick->LOAD为24bit)SysTick->VAL =0x00; //清空计数器SysTick->CTRL|=SysTick_CTRL_ENABLE_Msk ; //能滴答定时器开始倒数 do{temp=SysTick->CTRL;}while((temp&0x01)&&!(temp&(1<<16))); //等待时间到达 SysTick->CTRL&=~SysTick_CTRL_ENABLE_Msk; //关闭计数器SysTick->VAL =0X00; //清空计数器 } void LED_Init(void){ //使能GPIOE，GPIOF时钟RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE | RCC_AHB1Periph_GPIOF, ENABLE); //GPIOF9,F10初始化设置 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10; //LED0和LED1对应IO口GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//普通输出模式，GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出，驱动LED需要电流驱动GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHzGPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉GPIO_Init(GPIOF, &GPIO_InitStructure); //初始化GPIOF，把配置的数据写入寄存器 //GPIOE13,PE14初始化设置 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14; //LED2和LED3对应IO口GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//普通输出模式GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHzGPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉GPIO_Init(GPIOE, &GPIO_InitStructure); //初始化GPIOE，把配置的数据写入寄存器GPIO_SetBits(GPIOF,GPIO_Pin_9 | GPIO_Pin_10);//GPIOF9,PF10设置高，灯灭GPIO_SetBits(GPIOE,GPIO_Pin_13 | GPIO_Pin_14); }void USART1_Init(uint32_t baud){RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //使能GPIOA时钟RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE); //使能USART1时钟//串口1对应引脚复用映射GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1);//GPIOA9复用为USART1GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1);//GPIOA10复用为USART1//USART1端口配置GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;//GPIOA9与GPIOA10GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHzGPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉GPIO_Init(GPIOA,&GPIO_InitStructure);//初始化PA9，PA10//USART1 初始化设置USART_InitStructure.USART_BaudRate = baud;//波特率设置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(USART1, &USART_InitStructure); //初始化串口1 USART_Cmd(USART1, ENABLE); //使能串口1USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启相关中断//Usart1 NVIC 配置NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //串口1中断通道NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3; //抢占优先级3NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //子优先级3NVIC_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}void USART3_Init(uint32_t baud){RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE); //使能GPIOB时钟RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE); //使能USART3时钟//串口3对应引脚复用映射GPIO_PinAFConfig(GPIOB,GPIO_PinSource10,GPIO_AF_USART3);//GPIOB10复用为USART3GPIO_PinAFConfig(GPIOB,GPIO_PinSource11,GPIO_AF_USART3);//GPIOB11复用为USART3//USART1端口配置GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;//GPIOB10与GPIOB11GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHzGPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉GPIO_Init(GPIOB,&GPIO_InitStructure);//初始化PB10，PB11//USART1 初始化设置USART_InitStructure.USART_BaudRate = baud;//波特率设置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3 USART_Cmd(USART3, ENABLE); //使能串口3 USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//开启相关中断//Usart3 NVIC 配置NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn; //串口3中断通道NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3; //抢占优先级3NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //子优先级3NVIC_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}//重定义fputcint fputc(int ch,FILE *f){USART_SendData(USART1,ch);while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);return ch;}void usart1_send_bytes(uint8_t *pbuf,uint32_t len){while(len--){USART_SendData(USART1,*pbuf++);while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);}}void usart1_send_str(char *pbuf){while(pbuf && *pbuf){USART_SendData(USART1,*pbuf++);while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);}}void usart3_send_bytes(uint8_t *pbuf,uint32_t len){while(len--){USART_SendData(USART3,*pbuf++);while(USART_GetFlagStatus(USART3,USART_FLAG_TXE)==RESET);}}void usart3_send_str(char *pbuf){while(pbuf && *pbuf){USART_SendData(USART3,*pbuf++);while(USART_GetFlagStatus(USART3,USART_FLAG_TXE)==RESET);}}void ble_set_config(void){//配置模块的名字usart3_send_str("AT+NAMEHELLO\r\n");delay_ms(500);}int main(void){ LED_Init(); //系统定时器初始化，时钟源来自HCLK，且进行8分频，//系统定时器时钟频率=168MHz/8=21MHz SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8); //设置中断优先级分组2 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//串口1,波特率115200bps,开启接收中断USART1_Init(115200);printf("hello ble at test\r\n");//串口3,波特率9600bps,开启接收中断,蓝牙模块出厂设置为9600bpsUSART3_Init(9600); ble_set_config();while(1){}}void USART1_IRQHandler(void) //串口1中断服务程序{uint8_t d;if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)//接收中断 {//接收数据d = USART_ReceiveData(USART1); //发送数据usart3_send_bytes(&d,1);} } void USART3_IRQHandler(void) //串口3中断服务程序{uint8_t d;if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)//接收中断 {//接收数据d = USART_ReceiveData(USART3); //发送数据usart1_send_bytes(&d,1);} }
main.c
