STM32F7串口5初始化失败

Tsangcool · 发表于 2018-11-1 08:48:11

用的STM32F767想要初始化串口5，用的PB12(Rx)、PB13(Tx)，两脚均初始化为复用推免输出、上拉模式初始化后只有PB13上拉了，PB12还是没上拉，什么原因。代码如下

void uart_init(u32 bound)
{
UART5_Handler.Instance    =UART5;
UART5_Handler.Init.BaudRate  =bound;
UART5_Handler.Init.WordLength=UART_WORDLENGTH_8B;
UART5_Handler.Init.StopBits  =UART_STOPBITS_1;
UART5_Handler.Init.Parity=UART_PARITY_NONE;
UART5_Handler.Init.HwFlowCtl=UART_HWCONTROL_NONE;
UART5_Handler.Init.Mode=UART_MODE_TX_RX;

HAL_UART_Init(&UART5_Handler);
}

void HAL_UART_MspInit(UART_HandleTypeDef *huart)
{
            //uart5
if(huart->Instance==UART5)
{
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_UART5_CLK_ENABLE();

GPIO_Initure.Pin=GPIO_PIN_12;
GPIO_Initure.Mode=GPIO_MODE_AF_PP;
GPIO_Initure.Pull=GPIO_PULLUP;
GPIO_Initure.Speed=GPIO_SPEED_HIGH;
GPIO_Initure.Alternate=GPIO_AF8_UART5;
HAL_GPIO_Init(GPIOB,&GPIO_Initure);

GPIO_Initure.Pin=GPIO_PIN_13;
HAL_GPIO_Init(GPIOB,&GPIO_Initure);

HAL_NVIC_EnableIRQ(UART5_IRQn);
HAL_NVIC_SetPriority(UART5_IRQn,3,2);
}
}

其他程序与  例程实验3串口通讯程序一致