STM32 USART6 问题

只看该作者 · 2011-12-31 14:41

香主，STM32F407VGT6 LQFP100 在使能USART6后，导致FSMC不正常，FSMC接屏不能显示了，其他部分都正常，是怎么回事啊？

1万 · 2012-1-3 15:45

检查一下引脚的映射配置对不对。

只看该作者 · 2012-1-3 17:59

RCC, GPIOC, PC6,PC7, GPIO_PinAFConfig 都检查了没问题啊，同时在使用的USART1,2都没问题。

1万 · 2012-1-3 18:44

你怎么知道没有问题呢？

只看该作者 · 2012-1-3 19:11

那就贴上来吧

      /* Connect alternate function */
      GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_USART6);
      GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_USART6);

GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_Init(GPIOC, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_Init(GPIOC, &GPIO_InitStructure);

/* Enable the USART6 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART6_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

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;
USART_Init(USART6, &USART_InitStructure);

/* Enable USART6  Rx request */
USART_ITConfig(USART6, USART_IT_RXNE, ENABLE);

      USART_Cmd(USART6, ENABLE);