串口printf出一长串冗余的数字

ALCHEMIST

定义一个最大数组，按键按下 ，系统进入USART1接收中断接收MPU6050数据，释放，USART6通过串口模块在串口助手打印数据，结果只有第二次按下按键并松开时才能printf出正常的数据，每次复位后的第一次按键操作都会printf出一堆冗余的数字（每次的冗余数据好像都是一样的）。有人见过类似的情况吗？ 
万分感谢~

下面的数据都是冗余的数据：
0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  0.000000  -35027851575571492000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -7143479014884154400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  0.000000  0.000000  0.000000  0.000000  -3214208162333086000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  0.000000  0.000000  -2101101478197202000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -16992370489940172000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -97128321627121392000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -687509828315948880000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  0.000000  -0.000107  -50165882999059984000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -3294898827850357600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -0.000000  9463522718676524800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -16921942405281130000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  28712007706444560000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -12879792785683522000000000000000000000000000000000000000000000000000000000000000000.000000  -506852412323269920000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -500823466265924480000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  0.000000  0.000000  -980518762077523840000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -1572240958923033400000000000000000000000000000000000000000000000000000000000000.000000  -3741545358609749600000000000000000000000000000000000000000000000000000000000000.000000  -745716349173255040000000000000000000000000000000000000000000000000000000000000000.000000  0.000000  -3135653458042396400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -0.000000  0.000000  113179680331128480000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -0.000000  -0.000000  -3174967742764795200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -5164215306530506400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  0.000000  -3111022594187276400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  220204601932743880000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  0.000000  0.000000  -5500075960908372000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  13762799703262644000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -802656383858611360000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -1013529414354822600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  0.000000  -548417660673516880000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -619245503665048880000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  13548594133066222.000000  0.000000  -548417634510103120000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -300244939643826240000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  -878269505182414080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  0.000000  0.000000  0.000000  0.000000  1688584158288991600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.000000  0.000000  -22913888023114176000000000000000000000000000000000000000000000000000000000000000000.000000  651562659803798000000000000000.000000 

ALCHEMIST

哦   找到问题了     貌似是用了emx_Array_real_T这个结构体的原因    换成普通的double型数组就可以    但是不知道为什么

结构体是这样定义的:
emxArray_real_T
{
    double *data;
    int *size;
    int allocatedSize;
    int numDimensions;
    boolean_T canFreeData;
};

初始化函数：
void emxInit_real_T(emxArray_real_T **pEmxArray, int numDimensions)
{
  emxArray_real_T *emxArray;
  int i;
  *pEmxArray = (emxArray_real_T *)malloc(sizeof(emxArray_real_T));
  emxArray = *pEmxArray;
  emxArray->data = (double *)NULL;
  emxArray->numDimensions = numDimensions;
  emxArray->size = (int *)malloc((unsigned int)(sizeof(int) * numDimensions));
  emxArray->allocatedSize = 0;
  emxArray->canFreeData = true;
  for (i = 0; i < numDimensions; i++) 
{
    emxArray->size = 0;
  }
}

分配大小函数：
emxArray_real_T *emxCreate_real_T(int rows, int cols)
{
  emxArray_real_T *emx;
  int size[2];
  int numEl;
  int i;
  size[0] = rows;
  size[1] = cols;
  emxInit_real_T(&emx, 2);
  numEl = 1;
  for (i = 0; i < 2; i++) {
    numEl *= size;
    emx->size = size;
  }

  emx->data = (double *)calloc((unsigned int)numEl, sizeof(double));
  emx->numDimensions = 2;
  emx->allocatedSize = numEl;
  return emx;
}

emxInit_real_T(&struct_a,2);  
struct_a=emxCreate_real_T(600,3); 

请问这样初始化然后分配大小之后的struct_a->data跟普通的double型数组有什么不一样吗

正点原子

估计是你使用printf格式有问题。

ALCHEMIST

谢谢原子哥        

 格式问题？

struct_a->data是个600*3的二维数组   

for(i0=0;i0<loop_ub-1;i0++)
{
for(i=0;i<3;i++)
printf("%f  ",struct_a->data[i+i0*3]);
}  
或者
for(i=0;i<3;i++)
{
     for(i0=0;i0<loop_ub-1;i0++)
       printf("%f  ",struct_a->data[i+i0*3]);
}
结果一样呢


然后printf是用microlib的
 
int fputc(int ch, FILE *f)
{
USART_SendData(USART6, (uint8_t) ch);

while (USART_GetFlagStatus(USART6, USART_FLAG_TC) == RESET) {}
   
    return ch;
}
int GetKey (void)  { 

    while (!(USART1->SR & USART_FLAG_RXNE));

    return ((int)(USART1->DR & 0x1FF));
}

正点原子

回复【4楼】ALCHEMIST:
---------------------------------
地址一定要4字节对齐！！
估计你分配给data的内存没有4字节对齐，导致这个问题。

ALCHEMIST

 vc里面不是自动对齐的吗？   keil的编译器不一样吗？          我尝试着将data换成小一点的3*1或3*10然后再用动态内存分配   一开始倒是有地址了  一接收数据之后地址就变为0x00000000了       
struct emxArray_real_T
{
    double *data;
    int *size;
    int allocatedSize;
    int numDimensions;
    boolean_T canFreeData;
};
结构体是这样定义的   明明*size也是用emxArray->size = (int *)malloc((unsigned int)(sizeof(int) * numDimensions));分配成功了   
double *data用emx->data = (double *)calloc((unsigned int)numEl, sizeof(double));直接分配3*600的话地址就直接是0x00000000（难道一开始不能分配这么大）   就算像我前面用3*10可以分配地址了  但一接收数据又变成0x00000000了。。

ALCHEMIST

截图42是接收数据之后的   32是接收数据之前的