? ?如何使用 pd8,pd9 的重映射作為 usart3 使用呢

? { GPIO_InitTypeDef? GPIO_InitStructure = {0};

? ? USART_InitTypeDef USART_InitStructure = {0};

? ? NVIC_InitTypeDef? NVIC_InitStructure = {0};

? ? RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);

? ? RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD| RCC_APB2Periph_AFIO, ENABLE);

? ? GPIO_PinRemapConfig(GPIO_PartialRemap_USART3, ENABLE);

? ? /* USART3 TX-->D.8? RX-->D.9 */

? ? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;

? ? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

? ? GPIO_Init(GPIOD, &GPIO_InitStructure);

? ? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;

? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

? ? ? ? ? ? //GPIO_Mode_IN_FLOATING;

? ? GPIO_Init(GPIOD, &GPIO_InitStructure);

? ? USART_InitStructure.USART_BaudRate = 9600;

? ? 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_Tx | USART_Mode_Rx;

? ? USART_Init(USART3, &USART_InitStructure);

? ? //USART_ITConfig(USART3, USART_IT_IDLE, ENABLE);//開(kāi)啟串口空閑中斷

? ? //USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);

? ? //USART_ClearFlag(USART3, USART_FLAG_TC|USART_FLAG_IDLE);

? ? USART_Cmd(USART3, ENABLE); //使能串口

}

你好，你GPIO_PinRemapConfig函數(shù)中的參數(shù)設(shè)置錯(cuò)了，PD8、PD9對(duì)應(yīng)的映射是完全重映射，并非部分重映射。（具體參數(shù)可見(jiàn)上圖）

好了，謝謝