4.0.3版本中UART中断配置?

static rt_err_t hc32_configure(struct rt_serial_device *serial,
                                struct serial_configure *cfg)
{
............
    /* Register RX error interrupt */
    hc32_install_irq_handler(&uart->config.rxerr_irq_config,
            uart_irq_handlers[hc32_get_uart_index(uart->Instance)].rxerr_irq_handler,
            RT_TRUE);
    USART_FuncCmd(uart->Instance, UsartRxInt, Enable);
...........
}

int libc_stdio_set_console(const char* device_name, int mode)
{
    int fd;
    char name[STDIO_DEVICE_NAME_MAX];
    snprintf(name, sizeof(name) - 1, "/dev/%s", device_name);
    name[STDIO_DEVICE_NAME_MAX - 1] = '\0';
    fd = open(name, mode, 0);
    if (fd >= 0)
    {
        if (std_fd >= 0)
        {
            close(std_fd);
        }
        std_fd = fd;
    }
    return std_fd;
}