有用VISA实现上位机与CYpress68013通信的吗？

只看该作者 · 2015-10-4 21:17

不知道如何做，请教下各位高手

2万 · 2015-10-4 21:18

Cypress 官方网站论坛上的CY7C68013 与NI VISA labview 的通信 "Interfacing FX2LP with LabVIEW using NI-VISA drivers"

2万 · 2015-10-4 21:18

我做过这个不难吧 LABVIEW装一个VISA驱动就可以了

2万 · 2015-10-4 21:18

固件里把控制传输的代码写好，上位机中直接添加入对应的控制输入和输出

只看该作者 · 2015-10-4 21:19

不用labview，我是用VS08，现在VI写函数不知道哪里错了，编译又没错，但是写不成功，以下是代码：
#define NIVISA_USB
#include <afx.h>
#include <stdio.h>
#include<stdlib.h>
#include <visa.h>
#include<string.h>
ViSession defaultRM,vi;//定义保存会话句柄的变量
static ViUInt32 writeCount;
static ViStatus status;
unsigned char* lpoutbuffer;
char DataChange(CString str)//十六进制转换函数
{
  int k=0,j=0,Revalue;
  for (j=0;j<2;j++)
  {
      if(j==0)
   Revalue=16;
      else
      Revalue=1;
      switch (str[j])
      {
      case '0':k+=0;
               break;
      case '1':k+=Revalue;
         break;
      case '2':k+=Revalue*2;
               break;
      case '3':k+=Revalue*3;
               break;
   case '4':k+=Revalue*4;
               break;
      case '5':k+=Revalue*5;
               break;
      case '6':k+=Revalue*6;
               break;
      case '7':k+=Revalue*7;
               break;
      case '8':k+=Revalue*8;
               break;
      case '9':k+=Revalue*9;
               break;
      case 'A':k+=Revalue*10;
               break;
      case 'B':k+=Revalue*11;
               break;
      case 'C':k+=Revalue*12;
               break;
      case 'D':k+=Revalue*13;
               break;
      case 'E':k+=Revalue*14;
               break;
      case 'F':k+=Revalue*15;
               break;
      }
  }
  k=(char)k;
  return k;
}

int main()
{
  CString datastr,data;
  int  length,m,i;
  datastr.Empty();
  data.Empty();
  datastr="0A0170000000010000020200038F0004C0700500000600000700000804000900000C0F000D00000A01600B0B300A8050170202960400060C0F000D00000A01600A805004C07096";
  length=datastr.GetLength();
  m=length/2;
  lpoutbuffer=new unsigned char[m+1];
  for (i=0;i<m;i++)
{
         data=datastr.Mid(i*2,2);
         lpoutbuffer=DataChange(data);
         data.Empty();
}
lpoutbuffer='\0';

  status=viOpenDefaultRM(&defaultRM);//打开缺省资源管理器会话
  if (status < VI_SUCCESS)
{
   printf ("Could not open a session to the VISA Resource Manager!\n");
   exit (EXIT_FAILURE);
}
  status=viOpen(defaultRM,"USB0::0x0547::0x1002::NI-VISA-0::RAW",VI_NULL,VI_NULL,&vi);//打开仪器会话
  if (status < VI_SUCCESS)
{
   printf ("Cannot open a session to the device.\n");
      exit (EXIT_FAILURE);
}
  else
   printf ("open a session to the device successs.\n");

  status =viSetAttribute(vi,VI_ATTR_USB_BULK_OUT_PIPE,2);

  if(status<VI_SUCCESS)
         printf ("Error setting a response from the device\n");

  else
   printf (" setting a response from the device\n");

status = viWrite(vi,(ViBuf)lpoutbuffer, (ViUInt32)(m+1),&writeCount);
  // status = viWrite(vi,(ViBuf)datach, (ViUInt32)strlen(datach),&writeCount);
  if(status<VI_SUCCESS)
         printf ("Error writting a response from the device\n");
  else
   printf (" writing a response from the device\n");
// delete[] lpoutbuffer;
  viClose (vi);
  viClose(defaultRM);
  return 0;
}
麻烦看一下，我实在找不到原因了