void UART_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
USART_InitTypeDef USART_InitStructure_UART1;
USART_InitStructure_UART1.USART_BaudRate = 9600;
USART_InitStructure_UART1.USART_WordLength = USART_WordLength_8b;
USART_InitStructure_UART1.USART_StopBits = USART_StopBits_1;
USART_InitStructure_UART1.USART_Parity = USART_Parity_No ;
USART_InitStructure_UART1.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure_UART1.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure_UART1);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
通讯不成功，串口调试助手发送，Keil接收不数据，求解！
ISO3082 RS485
------解决方案--------------------
发送时有没有使能RS485的DE位呢
------解决方案--------------------
问题完美解决：
按照STM32F100手册，UART有对应的复用功能管脚，例如TIM3，没有/部分/完全重映射，在定义GPIO时一定要注意，使用UART管脚可省时省力；另，在发送/接收数据时，一定要注意DE/RE高低电平！
还有啥问题Q群：77203167