1.串口发送函数
static void NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; /* Configure one bit for preemption priority */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); /* ÅäÖÃÖжÏÔ´ */ NVIC_InitStructure.NVIC_IRQChannel = RS232_USART_IRQ; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } /** * @brief RS232_USART GPIO ÅäÖÃ,¹¤×÷ģʽÅäÖá£115200 8-N-1 £¬ÖжϽÓÊÕģʽ * @param ÎÞ * @retval ÎÞ */ void Debug_USART_Config(void) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; RCC_AHB1PeriphClockCmd( RS232_USART_RX_GPIO_CLK|RS232_USART_TX_GPIO_CLK, ENABLE); /* ʹÄÜ UART ʱÖÓ */ RCC_APB1PeriphClockCmd(RS232_USART_CLK, ENABLE); /* Á¬½Ó PXx µ½ USARTx_Tx*/ GPIO_PinAFConfig(RS232_USART_RX_GPIO_PORT,RS232_USART_RX_SOURCE, RS232_USART_RX_AF); /* Á¬½Ó PXx µ½ USARTx__Rx*/ GPIO_PinAFConfig(RS232_USART_TX_GPIO_PORT,RS232_USART_TX_SOURCE,RS232_USART_TX_AF); /* ÅäÖÃTxÒý½ÅΪ¸´Óù¦ÄÜ */ GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Pin = RS232_USART_TX_PIN ; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(RS232_USART_TX_GPIO_PORT, &GPIO_InitStructure); /* ÅäÖÃRxÒý½ÅΪ¸´Óù¦ÄÜ */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Pin = RS232_USART_RX_PIN; GPIO_Init(RS232_USART_RX_GPIO_PORT, &GPIO_InitStructure); /* ÅäÖô®¿ÚRS232_USART ģʽ */ USART_InitStructure.USART_BaudRate = RS232_USART_BAUDRATE; 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; USART_Init(RS232_USART, &USART_InitStructure); NVIC_Configuration(); /*ÅäÖô®¿Ú½ÓÊÕÖжÏ*/ USART_ITConfig(RS232_USART, USART_IT_RXNE, ENABLE); USART_Cmd(RS232_USART, ENABLE); } /***************** ·¢ËÍÒ»¸ö×Ö·û **********************/ static void Usart_SendByte( USART_TypeDef * pUSARTx, uint8_t ch ) { /* ·¢ËÍÒ»¸ö×Ö½ÚÊý¾Ýµ½USART1 */ USART_SendData(pUSARTx,ch); /* µÈ´ý·¢ËÍÍê±Ï */ while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET); } /***************** Ö¸¶¨³¤¶ÈµÄ·¢ËÍ×Ö·û´® **********************/ void Usart_SendStr_length( USART_TypeDef * pUSARTx, uint8_t *str,uint32_t strlen ) { unsigned int k=0; do { Usart_SendByte( pUSARTx, *(str + k) ); k++; } while(k < strlen); } /***************** ·¢ËÍ×Ö·û´® **********************/ void Usart_SendString( USART_TypeDef * pUSARTx, uint8_t *str) { unsigned int k=0; do { Usart_SendByte( pUSARTx, *(str + k) ); k++; } while(*(str + k)!=' '); } void Usart_Sendchar( USART_TypeDef * pUSARTx, char *str) { unsigned int k=0; do { Usart_SendByte( pUSARTx, *(str + k) ); k++; } while(*(str + k)!=' '); } ///Öض¨Ïòc¿âº¯Êýprintfµ½´®¿ÚRS232_USART£¬Öض¨Ïòºó¿ÉʹÓÃprintfº¯Êý int fputc(int ch, FILE *f) { /* ·¢ËÍÒ»¸ö×Ö½ÚÊý¾Ýµ½´®¿ÚRS232_USART */ USART_SendData(RS232_USART, (uint8_t) ch); /* µÈ´ý·¢ËÍÍê±Ï */ while (USART_GetFlagStatus(RS232_USART, USART_FLAG_TXE) == RESET); return (ch); } ///Öض¨Ïòc¿âº¯Êýscanfµ½´®¿ÚRS232_USART£¬ÖØдÏòºó¿ÉʹÓÃscanf¡¢getcharµÈº¯Êý int fgetc(FILE *f) { /* µÈ´ý´®¿ÚÊäÈëÊý¾Ý */ while (USART_GetFlagStatus(RS232_USART, USART_FLAG_RXNE) == RESET); return (int)USART_ReceiveData(RS232_USART); }
2.串口接收函数
u8 USART_RX_BUF[USART_REC_LEN]; //接收缓冲,最大USART_REC_LEN个字节. u16 USART_RX_STA=0; //接收状态标记 void uart_init(u32 bound){ //GPIO端口设置 GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA,ENABLE); //使能USART1，GPIOA时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); //使能USART1，GPIOA时钟 //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 //Usart1 NVIC 配置 NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //子优先级3 NVIC_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 // //USART1_TX GPIOA.9 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //PA.2 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_3;//PA3 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入 GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.3 //Usart1 NVIC 配置 // NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //子优先级3 NVIC_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 //USART 初始化设置 USART_InitStructure.USART_BaudRate = bound;//串口波特率 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_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断 USART_Cmd(USART1, ENABLE); //使能串口1 USART_Init(USART2, &USART_InitStructure); //初始化串口1 USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//开启串口接受中断 USART_Cmd(USART2, ENABLE); //使能串口1 } void USART1_IRQHandler(void) //串口1中断服务程序 { u8 Res; #if SYSTEM_SUPPORT_OS //如果SYSTEM_SUPPORT_OS为真，则需要支持OS. OSIntEnter(); #endif if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //接收中断(接收到的数据必须是0x0d 0x0a结尾) RESET=0 ！RESET =1 标志接收到了中断信号 { Res =USART_ReceiveData(USART1); //读取接收到的数据 每次保存一个 串口通信 if((USART_RX_STA&0x8000)==0)//接收未完成 保留STA的第十五位数据 如果STA的第十五位数据为0 表示接收未完成 { if(USART_RX_STA&0x4000)//接收到了0x0d 标志位第十五位没接收到但是接收到了第十四位为1 { if(Res!=0x0a)USART_RX_STA=0;//接收错误,重新开始 标志位十四位接收到了0x0d，此时的Res值不为回车则错误 else USART_RX_STA|=0x8000; //接收完成了 } else //还没收到0X0D 如果标志位第十四位也为0 { if(Res==0x0d)USART_RX_STA|=0x4000; //虽然标志位第十四位没接收到0x0d，但此时的Res值为0x0d，此时需要将STA的第十四位改为1 else { //虽然标志位没接收到0x0d，且此时Res的值也不为0x0d，则表示传输正在进行 USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ; //将接收到的值放入数组。 USART_RX_STA++; //接收到的个数+1 if(USART_RX_STA>(USART_REC_LEN-1)) //如果接收到的个数大于199 USART_RX_STA=0; //接收数据错误,重新开始接收 } } } } #if SYSTEM_SUPPORT_OS //如果SYSTEM_SUPPORT_OS为真，则需要支持OS. OSIntExit(); #endif } #endif
3.接收数据主函数
int main(void) { u8 t; u8 len; u16 times=0; delay_init(); //延时函数初始化 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);// 设置中断优先级分组2 uart_init(115200); //串口初始化为9600 LED_Init(); //初始化与LED连接的硬件接口 while(1) { if(USART_RX_STA&0x8000) { len=USART_RX_STA&0x3fff;//得到此次接收到的数据长度 printf("rn您发送的消息为:rn"); for(t=0;tDR=USART_RX_BUF[t]; while((USART1->SR&0X40)==0);//等待发送结束 } printf("rnrn");//插入换行 USART_RX_STA=0; LED0=!LED0; } else { times++; if(times%5000==0) { printf("rnALIENTEK MiniSTM32开发板 串口实验rn"); printf("正点原子@ALIENTEKrnrnrn"); } if(times%200==0)printf("请输入数据,以回车键结束rn"); if(times%30==0)//闪烁LED,提示系统正在运行. delay_ms(10); } } }
1.串口发送函数
static void NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; /* Configure one bit for preemption priority */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); /* ÅäÖÃÖжÏÔ´ */ NVIC_InitStructure.NVIC_IRQChannel = RS232_USART_IRQ; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } /** * @brief RS232_USART GPIO ÅäÖÃ,¹¤×÷ģʽÅäÖá£115200 8-N-1 £¬ÖжϽÓÊÕģʽ * @param ÎÞ * @retval ÎÞ */ void Debug_USART_Config(void) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; RCC_AHB1PeriphClockCmd( RS232_USART_RX_GPIO_CLK|RS232_USART_TX_GPIO_CLK, ENABLE); /* ʹÄÜ UART ʱÖÓ */ RCC_APB1PeriphClockCmd(RS232_USART_CLK, ENABLE); /* Á¬½Ó PXx µ½ USARTx_Tx*/ GPIO_PinAFConfig(RS232_USART_RX_GPIO_PORT,RS232_USART_RX_SOURCE, RS232_USART_RX_AF); /* Á¬½Ó PXx µ½ USARTx__Rx*/ GPIO_PinAFConfig(RS232_USART_TX_GPIO_PORT,RS232_USART_TX_SOURCE,RS232_USART_TX_AF); /* ÅäÖÃTxÒý½ÅΪ¸´Óù¦ÄÜ */ GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Pin = RS232_USART_TX_PIN ; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(RS232_USART_TX_GPIO_PORT, &GPIO_InitStructure); /* ÅäÖÃRxÒý½ÅΪ¸´Óù¦ÄÜ */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Pin = RS232_USART_RX_PIN; GPIO_Init(RS232_USART_RX_GPIO_PORT, &GPIO_InitStructure); /* ÅäÖô®¿ÚRS232_USART ģʽ */ USART_InitStructure.USART_BaudRate = RS232_USART_BAUDRATE; 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; USART_Init(RS232_USART, &USART_InitStructure); NVIC_Configuration(); /*ÅäÖô®¿Ú½ÓÊÕÖжÏ*/ USART_ITConfig(RS232_USART, USART_IT_RXNE, ENABLE); USART_Cmd(RS232_USART, ENABLE); } /***************** ·¢ËÍÒ»¸ö×Ö·û **********************/ static void Usart_SendByte( USART_TypeDef * pUSARTx, uint8_t ch ) { /* ·¢ËÍÒ»¸ö×Ö½ÚÊý¾Ýµ½USART1 */ USART_SendData(pUSARTx,ch); /* µÈ´ý·¢ËÍÍê±Ï */ while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET); } /***************** Ö¸¶¨³¤¶ÈµÄ·¢ËÍ×Ö·û´® **********************/ void Usart_SendStr_length( USART_TypeDef * pUSARTx, uint8_t *str,uint32_t strlen ) { unsigned int k=0; do { Usart_SendByte( pUSARTx, *(str + k) ); k++; } while(k < strlen); } /***************** ·¢ËÍ×Ö·û´® **********************/ void Usart_SendString( USART_TypeDef * pUSARTx, uint8_t *str) { unsigned int k=0; do { Usart_SendByte( pUSARTx, *(str + k) ); k++; } while(*(str + k)!=' '); } void Usart_Sendchar( USART_TypeDef * pUSARTx, char *str) { unsigned int k=0; do { Usart_SendByte( pUSARTx, *(str + k) ); k++; } while(*(str + k)!=' '); } ///Öض¨Ïòc¿âº¯Êýprintfµ½´®¿ÚRS232_USART£¬Öض¨Ïòºó¿ÉʹÓÃprintfº¯Êý int fputc(int ch, FILE *f) { /* ·¢ËÍÒ»¸ö×Ö½ÚÊý¾Ýµ½´®¿ÚRS232_USART */ USART_SendData(RS232_USART, (uint8_t) ch); /* µÈ´ý·¢ËÍÍê±Ï */ while (USART_GetFlagStatus(RS232_USART, USART_FLAG_TXE) == RESET); return (ch); } ///Öض¨Ïòc¿âº¯Êýscanfµ½´®¿ÚRS232_USART£¬ÖØдÏòºó¿ÉʹÓÃscanf¡¢getcharµÈº¯Êý int fgetc(FILE *f) { /* µÈ´ý´®¿ÚÊäÈëÊý¾Ý */ while (USART_GetFlagStatus(RS232_USART, USART_FLAG_RXNE) == RESET); return (int)USART_ReceiveData(RS232_USART); }
2.串口接收函数
u8 USART_RX_BUF[USART_REC_LEN]; //接收缓冲,最大USART_REC_LEN个字节. u16 USART_RX_STA=0; //接收状态标记 void uart_init(u32 bound){ //GPIO端口设置 GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA,ENABLE); //使能USART1，GPIOA时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); //使能USART1，GPIOA时钟 //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 //Usart1 NVIC 配置 NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //子优先级3 NVIC_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 // //USART1_TX GPIOA.9 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //PA.2 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_3;//PA3 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入 GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.3 //Usart1 NVIC 配置 // NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //子优先级3 NVIC_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 //USART 初始化设置 USART_InitStructure.USART_BaudRate = bound;//串口波特率 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_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断 USART_Cmd(USART1, ENABLE); //使能串口1 USART_Init(USART2, &USART_InitStructure); //初始化串口1 USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//开启串口接受中断 USART_Cmd(USART2, ENABLE); //使能串口1 } void USART1_IRQHandler(void) //串口1中断服务程序 { u8 Res; #if SYSTEM_SUPPORT_OS //如果SYSTEM_SUPPORT_OS为真，则需要支持OS. OSIntEnter(); #endif if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //接收中断(接收到的数据必须是0x0d 0x0a结尾) RESET=0 ！RESET =1 标志接收到了中断信号 { Res =USART_ReceiveData(USART1); //读取接收到的数据 每次保存一个 串口通信 if((USART_RX_STA&0x8000)==0)//接收未完成 保留STA的第十五位数据 如果STA的第十五位数据为0 表示接收未完成 { if(USART_RX_STA&0x4000)//接收到了0x0d 标志位第十五位没接收到但是接收到了第十四位为1 { if(Res!=0x0a)USART_RX_STA=0;//接收错误,重新开始 标志位十四位接收到了0x0d，此时的Res值不为回车则错误 else USART_RX_STA|=0x8000; //接收完成了 } else //还没收到0X0D 如果标志位第十四位也为0 { if(Res==0x0d)USART_RX_STA|=0x4000; //虽然标志位第十四位没接收到0x0d，但此时的Res值为0x0d，此时需要将STA的第十四位改为1 else { //虽然标志位没接收到0x0d，且此时Res的值也不为0x0d，则表示传输正在进行 USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ; //将接收到的值放入数组。 USART_RX_STA++; //接收到的个数+1 if(USART_RX_STA>(USART_REC_LEN-1)) //如果接收到的个数大于199 USART_RX_STA=0; //接收数据错误,重新开始接收 } } } } #if SYSTEM_SUPPORT_OS //如果SYSTEM_SUPPORT_OS为真，则需要支持OS. OSIntExit(); #endif } #endif
3.接收数据主函数
int main(void) { u8 t; u8 len; u16 times=0; delay_init(); //延时函数初始化 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);// 设置中断优先级分组2 uart_init(115200); //串口初始化为9600 LED_Init(); //初始化与LED连接的硬件接口 while(1) { if(USART_RX_STA&0x8000) { len=USART_RX_STA&0x3fff;//得到此次接收到的数据长度 printf("rn您发送的消息为:rn"); for(t=0;tDR=USART_RX_BUF[t]; while((USART1->SR&0X40)==0);//等待发送结束 } printf("rnrn");//插入换行 USART_RX_STA=0; LED0=!LED0; } else { times++; if(times%5000==0) { printf("rnALIENTEK MiniSTM32开发板 串口实验rn"); printf("正点原子@ALIENTEKrnrnrn"); } if(times%200==0)printf("请输入数据,以回车键结束rn"); if(times%30==0)//闪烁LED,提示系统正在运行. delay_ms(10); } } }
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