UART4配置不成功，怎么回事？

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void UART4_Configuration(void)

{

    USART_InitTypeDef USART_InitStructure;

    USART_ClockInitTypeDef  USART_ClockInitStructure;

    USART_ClockInitStructure.USART_Clock    = USART_Clock_Disable;

    USART_ClockInitStructure.USART_CPOL     = USART_CPOL_Low;

    USART_ClockInitStructure.USART_CPHA     = USART_CPHA_2Edge;

    USART_ClockInitStructure.USART_LastBit  = USART_LastBit_Disable;

    /* Configure the USART1 synchronous paramters */

    USART_ClockInit(UART4, &USART_ClockInitStructure); 

    //波特率设置为115200

    USART_InitStructure.USART_BaudRate      = 115200;   //38400;

    //一帧数据的宽度设置为8bits

    USART_InitStructure.USART_WordLength    = USART_WordLength_8b;

    //在帧结尾传输1个停止位

    USART_InitStructure.USART_StopBits      = USART_StopBits_1;

    //奇偶失能模式，无奇偶校验

    USART_InitStructure.USART_Parity        = USART_Parity_No ;

    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; 

    USART_InitStructure.USART_Mode          = USART_Mode_Rx |  USART_Mode_Tx;

    /* Configure USART2 basic and asynchronous paramters */

    USART_Init(UART4, &USART_InitStructure);  

    /*打开串口2的中断响应函数，接收中断*/

    USART_ITConfig(UART4, USART_IT_RXNE, ENABLE); 

    /*打开串口2*/  

    USART_Cmd(UART4, ENABLE);  

}


每次执行到USART_ClockInit(UART4, &USART_ClockInitStructure); 这条语句的时候，就跳到void assert_failed(uint8_t* file, uint32_t line)这句了，硬件错误吗？

正点原子

论坛有参考代码，不过貌似都是寄存器版本。