帮忙,32F101 UART2 Remap后不工作

ssrwork 提问时间：2008-12-11 18:08 /

GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

GPIO_PinRemapConfig(GPIO_Remap_USART2,ENABLE);
/* Enable USART2 clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
/* USART2 remap to PD5 PD6 */
/* Configure the GPIO ports( USART2 Transmit and Receive Lines) */
/* Configure the USART2_Tx as Alternate function Push-Pull */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/* Configure the USART2_Rx as input floating */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 ;
GPIO_Init(GPIOD, &GPIO_InitStructure);

/* USART2 configuration ------------------------------------------------------*/
/* USART2 configured as follow:
        - BaudRate = 4800 baud
        - Word Length = 8 Bits
        - One Stop Bit
        - No parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
*/
USART_InitStructure.USART_BaudRate = 4800;
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;
/* Configure the USART2 */
USART_Init(USART2, &USART_InitStructure);

/* Configure the USART2 RX interrupt */
USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);
/* Enable the USART2 */
USART_Cmd(USART2, ENABLE);

收发均不工作,没有Remap试过TX可以,RX没试(电路板不好试).