#include "stm32f10x.h"
#include "stdio.h"
static GPIO_InitTypeDef GPIO_InitStructure;
static NVIC_InitTypeDef NVIC_InitStructure;
static USART_InitTypeDef USART_InitStructure;
#define PB5OUT(n) *(volatile uint32_t *)(0x42000000+((uint32_t)&GPIOB->ODR-0x40000000)*32+n*4)
//串口初始化
void led0(void){
//led0-->PB5
//使能端口
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
//初始化GPIO引脚
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz;//高速响应
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB,GPIO_Pin_5);
}
void delay_ms(uint32_t n){
while(n--){
SysTick->CTRL=0; //关闭系统定时器,第0位:使能位,1为使能
SysTick->LOAD=(72000)-1;//配置计数值,因为计算机从0开始,所以减一
SysTick->VAL=0;//清空当前的值(标志位),定时器在计数时,标志位为0,当计数完毕时,标志位为1
SysTick->CTRL=5;//5=101 使能系统计时器,并且使用系统时钟
//第二位:时钟选择位,0=系统时钟/8,1=系统时钟
while((SysTick->CTRL&0x10000)==0);//等待计数到0
//第16位:计数到0则为1
}
SysTick->CTRL=0;
}
//printf函数重定向:修改fputc函数
int fputc(int c, FILE * stream){
USART_SendData(USART1, c);
//判断有没有发送完毕
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);
return c;
}
void usart3_send_str(char *pstr){
char *p=pstr;
while(*p!='\0'){
USART_SendData(USART3, *p);
//判断有没有发送完毕
while(USART_GetFlagStatus(USART3,USART_FLAG_TXE)==RESET) ;
p++;
}
}
//At指令配置模块,蓝牙4.0模块不能跟手机进行连接
void ble_config_set(void){
//测试指令
usart3_send_str("AT\r\n");
delay_ms(500);
//发送更改模块名字指令(需要复位生效,如果发送AT+RESET搜索蓝牙模块名字没有变更,那么请重新对蓝牙模块上电)
usart3_send_str("AT+NAME小小\r\n");
delay_ms(500);
usart3_send_str("AT+RESET\r\n");
delay_ms(500);
}
void usart3_init(uint32_t baud){
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); //使能PB10,PB11
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
//配置txPB10
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; //设置成复用功能
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz;//高速响应
GPIO_Init(GPIOB, &GPIO_InitStructure);
//配置rxPB11
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; //设置成复用功能
GPIO_Init(GPIOB, &GPIO_InitStructure);
//配置串口
USART_InitStructure.USART_BaudRate = baud;//设置波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//8位数据位
USART_InitStructure.USART_StopBits = USART_StopBits_1;//1个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验
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;//接受和发送模式
USART_Init(USART3, &USART_InitStructure);
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
//配置中断优先级
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//使能串口3
USART_Cmd(USART3, ENABLE);
}
void USART3_IRQHandler(void){
uint16_t xiao;
//检测标志位
if(USART_GetITStatus(USART3, USART_IT_RXNE)==SET)
{
//接收数据
xiao=USART_ReceiveData(USART3);
//将接收到的数据,返发给pc
USART_SendData(USART1,xiao);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);
USART_ClearFlag(USART1,USART_FLAG_TXE);
if(xiao=='1'){
PB5OUT(5)=0;
}else{
PB5OUT(5)=1;
}
//清空标志位
USART_ClearITPendingBit(USART3,USART_IT_RXNE );
}
}
void usart1_init(uint32_t baud){
//串口PA9 ,PA10
//硬件时钟时钟打开
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
//使能串口1的时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
//tx配置引脚的工作模式
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; //设置成复用功能
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz;//高速响应
GPIO_Init(GPIOA, &GPIO_InitStructure);
//USART1_RX GPIOA.10初始化
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10
//配置串口
USART_InitStructure.USART_BaudRate = baud;//设置波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//8位数据位
USART_InitStructure.USART_StopBits = USART_StopBits_1;//1个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验
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;//接受和发送模式
USART_Init(USART1, &USART_InitStructure);
//设置中断触发方式:接收一个字节触发中断
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
//配置中断优先级
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//使能串口1
USART_Cmd(USART1, ENABLE);
}
int main(){
usart1_init(115200);
usart3_init(9600);//默认波特率
led0();
while(1){
printf("hhh");
delay_ms(3000);
ble_config_set();
}
}
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