STM32串口发送数据，卡在检测发送完成标志位循环里

243811793

这个是什么原因？

243811793

感谢回复，发现最后原因是因为ST芯片换成GD的芯片时候，USART需要减1，我在这个初始化了USART1，但是在调用的时候调用的是USART2，还是不够细心导致的

243811793

void USART2_Send(unsigned char *buf, UINT8 len)
{
        do
        {
                usart_data_transmit(EVAL_COM2, *buf++);
                while(usart_flag_get(EVAL_COM2, USART_FLAG_TBE) == RESET);
        }while(--len);
}
改成gd芯片后，无限循环

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void ConsoleUart_Config(void)
{
        uint32_t USART_BaudRate = 0;
        //USART_InitTypeDef USART_InitStructure;
        //NVIC_InitTypeDef NVIC_InitStructure;

        /* Enable USART Clock */
        //RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
        rcu_periph_clock_enable(RCU_USART1);
       
        //USART_Cmd(USART2, DISABLE);
        usart_disable(USART1);
       
        // TODO: CLR IRQ FLAGS
#ifdef __VC_2_0__
        //USART_InitStructure.USART_BaudRate = 115200;
        USART_BaudRate = 115200;

#else
        //USART_InitStructure.USART_BaudRate = 38400;
        USART_BaudRate = 38400;
#endif
        /*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;
        STM_COM_Init(COM2, &USART_InitStructure);*/

       
            /* Enable GPIO clock */
        rcu_periph_clock_enable(EVAL_COM1_TX_GPIO_CLK);
        rcu_periph_clock_enable(EVAL_COM1_RX_GPIO_CLK);
        rcu_periph_clock_enable(RCU_AF);

        rcu_periph_clock_enable(EVAL_COM1_CLK);

  /* Configure USART Tx as alternate function push-pull */
        gpio_init(EVAL_COM1_TX_GPIO_PORT, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, EVAL_COM1_TX_PIN);
       
  /* Configure USART Rx as input floating */
        gpio_init(EVAL_COM1_RX_GPIO_PORT, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, EVAL_COM1_RX_PIN);

        /* USART configure */
        usart_deinit(EVAL_COM1);
        usart_baudrate_set(EVAL_COM1, USART_BaudRate);
        usart_receive_config(EVAL_COM1, USART_RECEIVE_ENABLE);
        usart_transmit_config(EVAL_COM1, USART_TRANSMIT_ENABLE);
       
        usart_enable(EVAL_COM1);
       
       

        /* Enable USART Receive interrupt */
        //USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

        usart_interrupt_enable(USART1, USART_INT_RBNE);
       
        //USART_ITConfig(USART2, USART_IT_TC,   ENABLE);

        /* Enable the USART Interrupt */
        /*NVIC_InitStructure.NVIC_IRQChannel    = USART2_IRQn;
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);

        USART_Cmd(USART2, ENABLE);*/


        nvic_irq_enable(USART1_IRQn, 3, 0);
        usart_enable(USART1);

#ifdef UART_ECHO
        FIFO_Init(&uart_rx_fifo,uart_rx_buff,sizeof(uart_rx_buff));
#endif
}
串口初始化

bin133

帮顶  

正点原子

说明一直不满足条件了，换GD的芯片， 看看gd官方的说明，应该是有些差异的地方要修改，不能原封不动的用。