STM32F407串口总是乱码-subo19920716的回答

STM32F407串口总是乱码

2019-07-20 22:34发布

有谁弄成功的吗？我试了串口1没反应，串口2，3都是乱码，只显示一个 “帱” 字，不解，STM32F103都正常，说明软件设置什么的没有问题，硬件也没有问题

void USART2_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; /* Enable GPIO clock */ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
/* Enable UART clock */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);
/* Connect PXx to USARTx_Tx*/ GPIO_PinAFConfig(GPIOC,GPIO_PinSource10,GPIO_AF_USART3);
/* Connect PXx to USARTx_Rx*/ GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_USART3);
/* Configure USART Tx as alternate function */ 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 = GPIO_Pin_10; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOC, &GPIO_InitStructure);
/* Configure USART Rx as alternate function */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_Init(GPIOC, &GPIO_InitStructure); /* USART configuration */ USART_InitStructure.USART_BaudRate = 2400; 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(USART3, &USART_InitStructure); /* Enable USART */ USART_Cmd(USART3, ENABLE); }