GD32F130X USART2不能用

发表于 2015-2-14 16:42

拿到一块GD32F130G8U6的板子，USART1没啥问题，USART2（PA8 TX,PB0 RX）死活不能用。用IAR调试的，设备选的STM32F100C8，HSE_STARTUP_TIMEOUT改成了0XFFFF。
求助！！

=================================================================
      RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOA , ENABLE );
      RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOB , ENABLE );

      RCC_APB2PeriphClockCmd( RCC_APB1Periph_USART2 , ENABLE );
      GPIO_DeInit( GPIOA );
      GPIO_DeInit( GPIOB );
      {
            /* Configure the GPIO ports */
            GPIO_InitTypeDef GPIO_InitStructure;
            /* Connect pin to Periph */
            GPIO_PinAFConfig( GPIOA , GPIO_PinSource8, GPIO_AF_4 );
            GPIO_PinAFConfig( GPIOB , GPIO_PinSource0, GPIO_AF_4 );

            /* Configure pins as AF pushpull */
            GPIO_InitStructure.GPIO_Pin       = GPIO_Pin_8;
            GPIO_InitStructure.GPIO_Mode       = GPIO_Mode_AF;
            GPIO_InitStructure.GPIO_Speed       = GPIO_Speed_50MHz;
            GPIO_InitStructure.GPIO_OType       = GPIO_OType_PP;
            GPIO_InitStructure.GPIO_PuPd       = GPIO_PuPd_NOPULL;
            GPIO_Init( GPIOA , &GPIO_InitStructure);

            /* Configure pins as AF pushpull */
            GPIO_InitStructure.GPIO_Pin       = GPIO_Pin_0;
            GPIO_InitStructure.GPIO_Mode       = GPIO_Mode_AF;
            GPIO_InitStructure.GPIO_Speed       = GPIO_Speed_50MHz;
            GPIO_InitStructure.GPIO_OType       = GPIO_OType_PP;
            GPIO_InitStructure.GPIO_PuPd       = GPIO_PuPd_NOPULL;
            GPIO_Init( GPIOB , &GPIO_InitStructure);


      }

      {
      USART_InitTypeDef USART_InitStructure;

      USART_DeInit( USART2);

      USART_InitStructure.USART_BaudRate                      = 115200;
      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(USART2, &USART_InitStructure);

      }

      /* USART enable */
      USART_Cmd(USART2, ENABLE);
      printf("abc");

=================================================================

发表于 2015-2-14 21:50

复制

       RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOA , ENABLE );

        RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOB , ENABLE );



        RCC_APB2PeriphClockCmd( RCC_APB1Periph_USART2 , ENABLE );

GPIO应该是挂在APB2的时钟上面,USART应该是挂在APB1的时钟上面了吧。

发表于 2015-2-14 21:50

以上代码是基于MDK中的分析，IAR没有试过。

发表于 2015-2-20 01:09

sunmeat 发表于 2015-2-14 21:50
GPIO应该是挂在APB2的时钟上面,USART应该是挂在APB1的时钟上面了吧。

的确是这个问题。折腾了一下午。谢谢哈

GD32F130X USART2不能用

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