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在线等,急!~求驻大神,中断中调用数组,运行不正常。



当前采用28335型DSP开发了一个机器,定时器Timer0中有这么一段程序,U是一个已定义好的数组,400维。但是目前程序仅仅用了前200个点。
int temp1 = count;
 int temp2 = countk;
 int a = 0;
 int b = 0;
 int c = 0;
 a = temp1 - 100 + 1;
 if (a < 0)
  a += 200;
 b = temp1 - 100;
 if (b < 0)
  b += 200;
 c = temp1 - 100 - 1;
 if (c < 0)
  c += 200;
 U[temp1] = 0.25 * (U[a] + 2 * U[b] + U[c]);

同样的程序,仅修改为
int temp1 = count;
 int temp2 = countk;
 int a = 0;
 int b = 0;
 int c = 0;
 a = temp1 - 200 + 1;
 if (a < 0)
  a += 400;
 b = temp1 - 200;
 if (b < 0)
  b += 400;
 c = temp1 - 200 - 1;
 if (c < 0)
  c += 400;
 U[temp1] = 0.25 * (U[a] + 2 * U[b] + U[c]);

机器便无法启动。启动过程中该段程序虽然运行,但是应该不会干扰到机器启动流程。