为什么uart3 不能 remap

发布于 2016-05-06 21:44:42 浏览：1589 订阅该版

哪位大神能帮我看一下，为什么我这段代码不能重映射到 C10 C11，我截取了uart.c里面的uart3的部分贴了出来，大家帮我看看，谢谢大家
```/* USART3_REMAP[1:0] = 00 */
#define UART3_GPIO_RX		GPIO_Pin_11
#define UART3_GPIO_TX		GPIO_Pin_10
#define UART3_GPIO			GPIOC
#define RCC_APBPeriph_UART3	RCC_APB1Periph_USART3
#define UART3_TX_DMA		DMA1_Channel2
#define UART3_RX_DMA		DMA1_Channel3

#ifdef RT_USING_UART3
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
    /* Enable USART3 clock */
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);

/* DMA clock enable */
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
#endif

#ifdef RT_USING_UART3

/* Configure USART3 Rx as input floating */
    GPIO_InitStructure.GPIO_Pin = UART3_GPIO_RX;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(UART3_GPIO, &GPIO_InitStructure);

/* Configure USART3 Tx as alternate function push-pull */
    GPIO_InitStructure.GPIO_Pin = UART3_GPIO_TX;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(UART3_GPIO, &GPIO_InitStructure);  
 	GPIO_PinRemapConfig(GPIO_FullRemap_USART3,ENABLE);
    
#endif

#ifdef RT_USING_UART3
    uart = &uart3;

config.baud_rate = BAUD_RATE_115200;
    config.bit_order = BIT_ORDER_LSB;
    config.data_bits = DATA_BITS_8;
    config.parity    = PARITY_NONE;
    config.stop_bits = STOP_BITS_1;
    config.invert    = NRZ_NORMAL;

serial3.ops    = &stm32_uart_ops;
    serial3.int_rx = &uart3_int_rx;
    serial3.config = config;

NVIC_Configuration(&uart3);

/* register UART1 device */
    rt_hw_serial_register(&serial3, "uart3",
                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
                          uart);
#endif```