以下是我自己寫的，感覺串口配置出問題了，串口1發(fā)送沒問題；但是串口二的接收字符串后馬上串口1發(fā)送數(shù)組不行。有沒有大佬幫忙修改一下
- #include "usart.h"
- #include "led.h"
- #include "SysTick.h"
- #include "string.h"
- #include "DFPlayer.h"
- /*******************************************************************************
- * 函 數(shù) 名 : USART1_Init
- * 函數(shù)功能 : USART1初始化函數(shù)
- * 輸 入 : bound:波特率
- * 輸 出 : 無
- *******************************************************************************/
- void USART1_Init(u32 bound)
- {
- //GPIO端口設(shè)置
- GPIO_InitTypeDef GPIO_InitStructure;
- USART_InitTypeDef USART_InitStructure;
- NVIC_InitTypeDef NVIC_InitStructure;
-
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
-
- /* 配置GPIO的模式和IO口 */
- GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;//TX //串口輸出PA9
- GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; //復用推挽輸出
- GPIO_Init(GPIOA,&GPIO_InitStructure); /* 初始化串口輸入IO */
- GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;//RX //串口輸入PA10
- GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; //模擬輸入
- GPIO_Init(GPIOA,&GPIO_InitStructure); /* 初始化GPIO */
-
- //USART1 初始化設(shè)置
- USART_InitStructure.USART_BaudRate = bound;//波特率設(shè)置
- USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字長為8位數(shù)據(jù)格式
- USART_InitStructure.USART_StopBits = USART_StopBits_1;//一個停止位
- USART_InitStructure.USART_Parity = USART_Parity_No;//無奇偶校驗位
- USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//無硬件數(shù)據(jù)流控制
- USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收發(fā)模式
- USART_Init(USART1, &USART_InitStructure); //初始化串口1
-
- USART_Cmd(USART1, ENABLE); //使能串口1
-
- USART_ClearFlag(USART1, USART_FLAG_TC);
-
- USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//開啟相關(guān)中斷
-
- while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);
- //Usart1 NVIC 配置
- NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//串口1中斷通道
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//搶占優(yōu)先級3
- NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //子優(yōu)先級3
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
- NVIC_Init(&NVIC_InitStructure); //根據(jù)指定的參數(shù)初始化VIC寄存器、
- }
- /*******************************************************************************
- * 函 數(shù) 名 : USART1_Send_Data
- * 函數(shù)功能 : USART1發(fā)送函數(shù)
- * 輸 入 : buf
- * 輸 入 : len
- * 輸 出 : 無
- *******************************************************************************/
- void USART1_Send_Data(u8 *buf,uint16_t len)
- {
- u8 t=0;
- for(t=0;t<len;t++) //循環(huán)發(fā)送數(shù)據(jù)
- {
- USART_SendData(USART1,buf[t] );
- while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);
- }
- }
- /*******************************************************************************
- * 函 數(shù) 名 : uart2_init
- * 函數(shù)功能 : IO端口及串口2，時鐘初始化函數(shù) A2,A3
- * 輸 入 : 無
- * 輸 出 : 無
- *******************************************************************************/
- void USART2_Init(u32 bt)
- {
- USART_InitTypeDef USART_InitStructure;
- NVIC_InitTypeDef NVIC_InitStructure;
- GPIO_InitTypeDef GPIO_InitStructure; //聲明一個結(jié)構(gòu)體變量，用來初始化GPIO
- //使能串口的RCC時鐘
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE); //使能UART3所在GPIOB的時鐘
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
- //串口使用的GPIO口配置
- // Configure USART2 Rx (PB.11) as input floating
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- // Configure USART2 Tx (PB.10) as alternate function push-pull
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- //配置串口
- USART_InitStructure.USART_BaudRate = bt;
- 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;
- // Configure USART
- USART_Init(USART2, &USART_InitStructure);//配置串口
- // Enable USART1 Receive interrupts 使能串口接收中斷
- USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
- //串口發(fā)送中斷在發(fā)送數(shù)據(jù)時開啟
- //USART_ITConfig(USART2, USART_IT_TXE, ENABLE);
- // Enable the USART3
- USART_Cmd(USART2, ENABLE);//使能串口
- //串口中斷配置
- //Configure the NVIC Preemption Priority Bits
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
- // Enable the USART Interrupt
- NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_Init(&NVIC_InitStructure);
- }
- char USART_ReceiveString[50]; //接收PC端發(fā)送過來的字符
- int Receive_Flag = 0; //接收消息標志位
- int Receive_sum = 0; //數(shù)組下標
- void USART2_IRQHandler(void) //中斷
- {
- if(USART_GetITStatus(USART2,USART_IT_RXNE) == 1) //USART_FLAG_RXNE判斷數(shù)據(jù)，== 1則有數(shù)據(jù)
- {
- if(Receive_sum > 49) //數(shù)組能存放50個字節(jié)的數(shù)據(jù)
- {
- USART_ReceiveString[49] = '\0'; //數(shù)據(jù)字節(jié)超過50位時，將最后一位設(shè)置為\0
- Receive_Flag = 1; //接收標志位置1，停止接收數(shù)據(jù)
- Receive_sum = 0; //數(shù)組下標置0
- }
-
- if(Receive_Flag == 0) //接收標志位等于0，開始接收數(shù)據(jù)
- {
- USART_ReceiveString[Receive_sum] = USART_ReceiveData(USART2); //通過USART2串口接收字符
- Receive_sum++; //數(shù)組下標++
- }
-
- if(Receive_sum >= 2) //數(shù)組下標大于2
- {
- if(USART_ReceiveString[Receive_sum-2] == '\r' && USART_ReceiveString[Receive_sum-1] == '\n' )
- {
- USART_ReceiveString[Receive_sum-1] = '\0';
- USART_ReceiveString[Receive_sum-2] = '\0';
- Receive_Flag = 1; //接收標志位置1，停止接收數(shù)據(jù)
- Receive_sum = 0; //數(shù)組下標置0
- if(strcmp(USART_ReceiveString,"batteriesHarmful") == 0)
- {
- led1=!led1;
- }
- if(strcmp(USART_ReceiveString,"cansRecyclable") == 0)
- {
- Uart_DFPlayer(0x03 , 0x02) ;
- }
- if(strcmp(USART_ReceiveString,"cartonRecyclable") == 0)
- {
- Uart_DFPlayer(0x03 , 0x03) ;
- }
- if(strcmp(USART_ReceiveString,"cigaretteDry") == 0)
- {
- Uart_DFPlayer(0x03 , 0x04) ;
- }
- if(strcmp(USART_ReceiveString,"tissueDry") == 0)
- {
- Uart_DFPlayer(0x03 , 0x05) ;
- }
-
- Receive_Flag = 0;
- }
- }
- USART_ClearITPendingBit(USART2,USART_IT_RXNE); //接收后先清空標志位
- }
-
- }
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