stm32f107通信问题

枫飞 · 发表于 2014-11-20 15:44:38

芯片用的是stm32f107vb，使用USART3，PB10、PB11，不需要重映射

一开始用的原来103的启动文件startup_stm32f10x_md.s，预定义为STM32F10X_MD，结果通信正常。
现在改为startup_stm32f10x_cl.s，预定义也改为STM32F10X_CL。其他没变，结果接收数据错误。
现在串口中断中自发自收。
在串口调试助手中发送01，接收E0，发送02，接收00，发送13接收00,发送0A，接收1C，发送的同一个数，对应接收的同一个数

就改了启动文件和预定义的那个，程序不变如下

[mw_shl_code=c,true]void uart_init(u32 bound) { USART_InitTypeDef USART_InitStructure; //USART 初始化设置 USART_InitStructure.USART_BaudRate = bound; //一般设置为115200; 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 STM_EVAL_COMInit(COM3, &USART_InitStructure); #if EN_USART3_RX //如果使能了接收 USART3_NVIC(); #endif } u16 USART_RX_STA=0; //接收状态标记 void USART3_NVIC() { NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = USART3_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_ITConfig(EVAL_COM3, USART_IT_RXNE, ENABLE);//开启中断 } void STM_EVAL_COMInit(COM_TypeDef COM, USART_InitTypeDef* USART_InitStruct) { GPIO_InitTypeDef GPIO_InitStructure; /* Enable GPIO clock */ RCC_APB2PeriphClockCmd(COM_TX_PORT_CLK[COM] | COM_RX_PORT_CLK[COM], ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); RCC_APB1PeriphClockCmd(COM_USART_CLK[COM], ENABLE); /* Configure USART Tx as alternate function push-pull */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽输出 GPIO_InitStructure.GPIO_Pin = COM_TX_PIN[COM]; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(COM_TX_PORT[COM], &GPIO_InitStructure); /* Configure USART Rx as input floating */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入 GPIO_InitStructure.GPIO_Pin = COM_RX_PIN[COM]; GPIO_Init(COM_RX_PORT[COM], &GPIO_InitStructure); USART_Init(COM_USART[COM],USART_InitStruct); //初始化串口 //使能串口 USART_Cmd(COM_USART[COM], ENABLE); } void USART3_IRQHandler(void) //串口3中断服务程序 { u8 Res; if(USART_GetITStatus(EVAL_COM3, USART_IT_RXNE) != RESET) //接收中断(接收到的数据必须是0x0d 0x0a结尾) { Res =USART_ReceiveData(EVAL_COM3);//(USART3->DR); //读取接收到的数据 USART_SendData(EVAL_COM3,Res); //串口自发自收 // USART_SendData(EVAL_COM3,USART_ReceiveData(EVAL_COM3)); if((USART_RX_STA&0x8000)==0)//接收未完成 { if(USART_RX_STA&0x4000)//接收到了0x0d { if(Res!=0x0a) USART_RX_STA=0;//接收错误,重新开始 else USART_RX_STA|=0x8000; //接收完成了 } else //还没收到0X0D { if(Res==0x0d) USART_RX_STA|=0x4000; else { USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ; USART_RX_STA++; if(USART_RX_STA>(USART_REC_LEN-1)) USART_RX_STA=0;//接收数据错误,重新开始接收 } } } } } [/mw_shl_code]