stm32f030的usart通信

发布网友发布时间：2022-04-25 12:01

共1个回答

热心网友时间：2024-01-26 15:53

1. 对应USART2的引脚没有配，比如PAx, PBx之类的，也要打开相应GPIO的Clock
GPIO_PinAFConfig(TX_GPIO_PORT, TX_SOURCE, TX_AF);
GPIO_PinAFConfig(RX_GPIO_PORT, RX_SOURCE, RX_AF);

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

GPIO_InitStructure.GPIO_Pin = TX_PIN;
GPIO_Init(TX_GPIO_PORT, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = RX_PIN;
GPIO_Init(RX_GPIO_PORT, &GPIO_InitStructure);

2. 对应USART2_InitStruct的结构体成员未填充
USART2_InitStructure.USART_BaudRate = 115200;
USART2_InitStructure.USART_WordLength = USART_WordLength_8b;
USART2_InitStructure.USART_StopBits = USART_StopBits_1;
USART2_InitStructure.USART_Parity = USART_Parity_No;
USART2_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USART2_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_OverSampling8Cmd(USART2, ENABLE);

再加上你的USART_Init(USART2, USART2_InitStructure);

3. 对应USART2的模块没有打开
USART_Cmd(USART2, ENABLE);