stm32f407的drv_usart.c文件编译错误

发布于 2024-07-23 10:49:36 浏览：451 订阅该版

[tocm]

# stm32f407的drv_usart.c文件编译错误
```c
static rt_err_t stm32_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
    struct stm32_uart *uart;
    RT_ASSERT(serial != RT_NULL);
    RT_ASSERT(cfg != RT_NULL);

uart = rt_container_of(serial, struct stm32_uart, serial);

/* uart clock enable */
    stm32_uart_clk_enable(uart->config);
    /* uart gpio clock enable and gpio pin init */
    stm32_gpio_configure(uart->config);

uart->handle.Instance          = uart->config->Instance;
    uart->handle.Init.BaudRate     = cfg->baud_rate;
    uart->handle.Init.Mode         = UART_MODE_TX_RX;
    uart->handle.Init.OverSampling = UART_OVERSAMPLING_16;
    switch (cfg->flowcontrol)
    {
    case RT_SERIAL_FLOWCONTROL_NONE:
        uart->handle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
        break;
    case RT_SERIAL_FLOWCONTROL_CTSRTS:
        uart->handle.Init.HwFlowCtl = UART_HWCONTROL_RTS_CTS;
        break;
    default:
        uart->handle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
        break;
    }
    switch (cfg->data_bits)
    {
    case DATA_BITS_8:
        if (cfg->parity == PARITY_ODD || cfg->parity == PARITY_EVEN)
            uart->handle.Init.WordLength = UART_WORDLENGTH_9B;
        else
            uart->handle.Init.WordLength = UART_WORDLENGTH_8B;
        break;
    case DATA_BITS_9:
        uart->handle.Init.WordLength = UART_WORDLENGTH_9B;
        break;
    default:
        uart->handle.Init.WordLength = UART_WORDLENGTH_8B;
        break;
    }

switch (cfg->stop_bits)
    {
    case STOP_BITS_1:
        uart->handle.Init.StopBits   = UART_STOPBITS_1;
        break;
    case STOP_BITS_2:
        uart->handle.Init.StopBits   = UART_STOPBITS_2;
        break;
    default:
        uart->handle.Init.StopBits   = UART_STOPBITS_1;
        break;
    }

switch (cfg->parity)
    {
    case PARITY_NONE:
        uart->handle.Init.Parity     = UART_PARITY_NONE;
        break;
    case PARITY_ODD:
        uart->handle.Init.Parity     = UART_PARITY_ODD;
        break;
    case PARITY_EVEN:
        uart->handle.Init.Parity     = UART_PARITY_EVEN;
        break;
    default:
        uart->handle.Init.Parity     = UART_PARITY_NONE;
        break;
    }

#ifdef RT_SERIAL_USING_DMA
    uart->dma_rx.last_index = 0;
#endif

if (HAL_UART_Init(&uart->handle) != HAL_OK)
    {
        return -RT_ERROR;
    }

return RT_EOK;
}
```
中的有一段关于流控的存在问题，会造成编译不通过,struct serial_configure结构体中不存在成员变量flowcontrol，代码如下：
```c
 switch (cfg->flowcontrol)
    {
    case RT_SERIAL_FLOWCONTROL_NONE:
        uart->handle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
        break;
    case RT_SERIAL_FLOWCONTROL_CTSRTS:
        uart->handle.Init.HwFlowCtl = UART_HWCONTROL_RTS_CTS;
        break;
    default:
        uart->handle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
        break;
    }
```
初步推测是配置工具的问题，但是在stm32h753却没有出现这种问题，。