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STM32f103相关,USART1,USART2,led灯,蓝牙模块,通过手机app发送指令蓝牙转发实现对led的控制。 代码片段 #include “stm32f10x.h” #include “GPIOLIKE51.h” #include “stdio.h” u8 usart1_buf[100]={0},usart3_buf[100]={0}; u16 index1=0,index3=0,flag1=0,flag3=0; int fputc( int ch, FILE *f ){ USART_SendData(USART1,(u8) ch ); while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET); return ch; } void delay(uint32_t num){ while(num--); } void delay_ms(uint32_t n){ while(n--){ SysTick-》CTRL = 0; //Disable SysTick 关闭系统定时器 SysTick-》LOAD = 9000; //Count from 255 to 0 (256 cycles) 配置计数值 SysTick-》VAL = 0; //CLear current value as well as count flag 清空当前寄存器计数值 SysTick-》CTRL = 1; //Enable SysTick timer with processor clock 使能系统定时器 while((SysTick-》CTRL & (1《《16)) == 0); //Wait until count flag is set } SysTick-》CTRL = 0; //Disable SysTick 关闭系统定时器 } void USART1_init(){ GPIO_InitTypeDef GPIO_InitStructure; //配置串口结构体 USART_InitTypeDef USART_InitStructure; //NVIC结构体 NVIC_InitTypeDef NVIC_InitStructure; //使能GPIO硬件时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能串口1硬件时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); //USART1_TX GPIOA.9 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9 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.9 //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 USART_InitStructure.USART_BaudRate = 9600; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; /* Enable the USARTy Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;//抢占优先级1 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级1 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能 NVIC_Init(&NVIC_InitStructure); USART_Init(USART1, &USART_InitStructure); //初始化串口1 USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //配置为接收中断 USART_Cmd(USART1, ENABLE); //使能串口1 } void USART3_init(){ GPIO_InitTypeDef GPIO_InitStructure; //配置串口结构体 USART_InitTypeDef USART_InitStructure; //NVIC结构体 NVIC_InitTypeDef NVIC_InitStructure; //使能GPIO硬件时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); //使能串口3硬件时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); //USART3_TX GPIOB.10 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PA.9 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); //初始化GPIOA.9 //USART3_RX GPIOB.11初始化 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; //PA10 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入 GPIO_Init(GPIOB, &GPIO_InitStructure); //初始化GPIOA.10 USART_InitStructure.USART_BaudRate = 9600; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; /* Enable the USARTy Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;//抢占优先级2 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //子优先级1 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能 NVIC_Init(&NVIC_InitStructure); USART_Init(USART3, &USART_InitStructure); //初始化串口3 USART_ITConfig(USART3, USART_IT_RXNE, ENABLE); //配置为接收中断 USART_Cmd(USART3, ENABLE); //使能串口3 } void USART1_SEND_STR(char *pstr){ char *p = pstr; while(*p != ‘ ’){ USART_SendData(USART1, *p); while(USART_GetFlagStatus(USART3,USART_FLAG_TXE)==RESET); USART_ClearFlag(USART1, USART_FLAG_TXE); p++; } } void USART3_SEND_STR(char *pstr){ char *p = pstr; while(*p != ‘ ’){ USART_SendData(USART3, *p); while(USART_GetFlagStatus(USART3,USART_FLAG_TXE)==RESET); USART_ClearFlag(USART3, USART_FLAG_TXE); p++; } } //蓝牙AT指令配置模块 void BLE_CONFIG_SET(){ //发送AT测试指令 USART3_SEND_STR(“ATrn”); delay_ms(500); //发送AT更改模块名指令 USART3_SEND_STR(“AT+NAMEble_01rn”); delay_ms(600); //发送AT重启模块名指令 USART3_SEND_STR(“AT+RESETrn”); delay_ms(2000); } //主函数,从这里执行 int main(void){ GPIO_InitTypeDef GPIO_InitStruct; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); GPIO_InitStruct.GPIO_Mode=GPIO_Mode_Out_PP; GPIO_InitStruct.GPIO_Pin=GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15; GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz; GPIO_Init(GPIOC, &GPIO_InitStruct); GPIO_SetBits(GPIOC, GPIO_Pin_13); PCout(14)=0;PCout(15)=0; //pc串口 USART1_init(); //蓝牙串口 USART3_init(); NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //蓝牙模块配置 BLE_CONFIG_SET(); while(1){ PCout(13)=1; delay_ms(1000); PCout(13)=0; delay_ms(1000); } } void USART1_IRQHandler(void) { u16 code; if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) { USART_ClearITPendingBit(USART1, USART_IT_RXNE);//Removal of receiving interrupt flag code=USART_ReceiveData(USART1); printf(“%c”, code); usart1_buf[index1] = code; index1++; if(code == 0x0a) { index1 = 0; flag1 = 1; } } } void USART3_IRQHandler(void) { u16 code; if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET) { USART_ClearITPendingBit(USART3, USART_IT_RXNE); code=USART_ReceiveData(USART3); printf(“%c”, code); usart3_buf[index3] = code; index3++; if(code == 0x0a) { index3 = 0; flag3 = 1; } //开灯 if(code == 0x31) { PCout(14)=1; } //关灯 if(code == 0x32) { PCout(14)=0; } //开灯 if(code == 0x33) { PCout(15)=1; } //关灯 if(code == 0x34) { PCout(15)=0; } } } |
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