Initial

r1113 | dcl | 2006-09-12 15:00:46 +1000 (Tue, 12 Sep 2006) | 2 lines
2006-09-12 15:00:46 +10:00
parent 99ebb2e910
commit 60124655d0
15 changed files with 2990 additions and 0 deletions
--- a/site_ansto/hardsup/Digital/hdio.c
+++ b/site_ansto/hardsup/Digital/hdio.c
@@ -0,0 +1,164 @@
+#include "hdio.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <NIDAQmx.h>
+
+#define SAMPLE_COUNT 1
+#define BUFFER_SIZE 96
+#define PORT_RANGE "Dev2/line0:95"
+#define READ_TIMEOUT 2.0
+
+#define DAQmxErrChk(functionCall) \
+  do { if( DAQmxFailed(error=(functionCall)) ) \
+    goto Error; } while(0);
+
+/**
+ * This structure encapsulates the data that is private to
+ * the implementation of the NI DAQ counter interface
+ */
+typedef struct counter_private_t
+{
+  /** NIDAQ opaque task handle */
+  TaskHandle  taskHandle;
+  /** Actual physical data value, as returned by NIDAQ read function */
+  uInt8       data[BUFFER_SIZE];
+  /** previous physical data value */
+  uInt8       old_data[BUFFER_SIZE];
+  /** NIDAQ device number of card */
+  int         device_number;
+  /** number of samples read */
+  int32       numRead;
+  /** number of bytes per sample */
+  int32       bytesPerSamp;
+} COUNTER_PRIVATE;
+
+
+int hdio_ctor(const char* device_name, pHDIO* ptr)
+{
+  int error = 0;
+  bool flag = false;
+  char text_string[] = "dev1/line0:7";
+  const char *name;
+  const char *text;
+
+  *ptr = (COUNTER_PRIVATE*) malloc(sizeof(COUNTER_PRIVATE));
+  memset(*ptr, 0, sizeof(COUNTER_PRIVATE));
+
+  name = device_name;
+  text = text_string;
+  while (name && *name)
+  {
+    if (isspace(*name))
+      ++name;
+    else if (*name >= '0' && *name <= '7')
+    {
+      if (flag)
+      {
+      }
+      else
+      {
+        (*ptr)->device_number = *name - '0';
+        flag = true;
+      }
+    }
+    else if (tolower(*name) != *text)
+    {
+      /* TODO error */
+      break;
+    }
+    ++name;
+    ++text;
+  }
+  /*********************************************/
+  // Create a DAQmx task
+  /*********************************************/
+  DAQmxErrChk (DAQmxCreateTask("",&(*ptr)->taskHandle));
+
+  /*********************************************/
+  // Create a DAQmx port within the task
+  /*********************************************/
+  DAQmxErrChk (DAQmxCreateDIChan((*ptr)->taskHandle,
+        PORT_RANGE,
+        "",
+        DAQmx_Val_ChanPerLine));
+
+  /*********************************************/
+  // Start the DAQmx task
+  /*********************************************/
+  DAQmxErrChk (DAQmxStartTask((*ptr)->taskHandle));
+
+  return 0;
+Error:
+  free(*ptr);
+  *ptr = NULL;
+  return error;
+}
+
+int hdio_read(pHDIO hdio, unsigned long long* value)
+{
+  int error = 0;
+  error = 0;
+  hdio->numRead = 0;
+  hdio->bytesPerSamp = 0;
+  /*********************************************/
+  // DAQmx Read Code
+  /*********************************************/
+  error = DAQmxReadDigitalLines (hdio->taskHandle,
+      SAMPLE_COUNT,
+      READ_TIMEOUT,
+      DAQmx_Val_GroupByScanNumber,
+      hdio->data,
+      BUFFER_SIZE,
+      &hdio->numRead,
+      &hdio->bytesPerSamp,
+      NULL);
+
+  if (error == DAQmxErrorSamplesNotYetAvailable)
+  {
+    printf("Timeout, reading raw data\n");
+    error = 0;
+  }
+  else if (hdio_failed(error))
+    goto Error;
+  else
+  {
+    // TODO copy the data
+  }
+
+  return error;
+Error:
+  return error;
+}
+
+int hdio_dtor(pHDIO* hdio)
+{
+  if( hdio && *hdio && (*hdio)->taskHandle!=0 )
+  {
+    /*********************************************/
+    // DAQmx Stop Code
+    /*********************************************/
+    DAQmxStopTask((*hdio)->taskHandle);
+    DAQmxClearTask((*hdio)->taskHandle);
+  }
+  (*hdio)->taskHandle = 0;
+  free (*hdio);
+  *hdio = NULL;
+  return 0;
+}
+
+bool hdio_failed(int error)
+{
+  if (DAQmxFailed(error))
+    return true;
+  else
+    return false;
+}
+
+void hdio_errmsg(char* buff, int len)
+{
+  *buff = '\0';
+  DAQmxGetExtendedErrorInfo(buff, len);
+}
+