LVDT Summary

lvdt_summary

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LVDT Summary

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LVDT Summary Sample Application (SSK 2.x)

Overview

The LVDT Summary sample application demonstrates how to read and manage fault status across all channels of an LVDT (Linear Variable Differential Transformer) module using the NAI Software Support Kit (SSK 2.x). It covers the core status operations you will need in your own application: displaying latched BIT and summary status for every channel, clearing latched status registers, and configuring interrupts on the summary status register.

The summary register is the key concept in this sample. It is a bit-mapped register where each bit corresponds to a channel (bit 0 = channel 1). A bit reads 1 when the corresponding channel has detected a fault in its BIT status. This gives you a single register to poll for any fault condition across the entire module, rather than reading BIT status individually for each channel.

This sample supports LVDT module types: LD1-LD5. It serves as a practical API reference — each menu command maps directly to one or more naibrd_LVDT_*() API calls that you can lift into your own code.

Note
 This pattern is new to SSK 2.x and has no SSK 1.x counterpart.

Prerequisites

Before running this sample, make sure you have:

  • An NAI board with an LVDT module installed (LD1-LD5).

  • SSK 2.x installed on your development host.

  • The sample applications built. Refer to the SSK 2.x Software Development Guide for platform-specific build instructions.

How to Run

Launch the lvdt_summary executable from your build output directory. On startup the application looks for a configuration file (default_LVDT_Summary.txt). On the first run, this file will not exist — the application will present an interactive board menu where you configure a board connection, card index, and module slot. You can save this configuration so that subsequent runs skip the menu and connect automatically. Once connected, select a channel for interrupt operations, then use the command menu to display status, configure interrupts, and clear status registers.

The recommended sequence for exploring this sample is:

  1. CLEAR — clear all latched status registers to start from a clean state.

  2. STAT — display all latched statuses (should all be zero after clearing).

  3. INT — configure the interrupt subsystem on your selected channel.

  4. STAT — display statuses again to observe any changes.

  5. CLEAR — clear all statuses to reset.

Board Connection and Module Selection

Note
 This startup sequence is common to all NAI sample applications. The board connection and module selection code shown here is not specific to LVDT.

The main() function follows a standard SSK 2.x startup flow:

  1. Call naiapp_RunBoardMenu() to load a saved configuration file (if one exists) or present the interactive board menu. The configuration file (default_LVDT_Summary.txt) is not included with the SSK — it is created when the user saves their connection settings from the board menu. On the first run, the menu will always appear.

  2. Query the user for a card index with naiapp_query_CardIndex().

  3. Query for a module slot with naiapp_query_ModuleNumber().

  4. Retrieve the module ID with naibrd_GetModuleName() so downstream code can adapt to the specific LVDT variant installed.

#if defined (NAIBSP_CONFIG_SOFTWARE_OS_VXWORKS)
int32_t lvdt_summary(void)
#else
int32_t main(void)
#endif
{
   int32_t cardIndex;
   int32_t moduleCnt;
   int32_t module;
   bool_t stop = NAI_FALSE;
   uint32_t moduleID;
   int8_t inputBuffer[80];
   int32_t inputResponseCnt;

   if (naiapp_RunBoardMenu(DEF_CONFIG_FILE) == (bool_t)NAI_TRUE)
   {
      while (stop != NAI_TRUE)
      {
         stop = naiapp_query_CardIndex(naiapp_GetBoardCnt(), DEF_LVDT_CARD_INDEX, &cardIndex);
         if (stop != NAI_TRUE)
         {
            check_status(naibrd_GetModuleCount(cardIndex, &moduleCnt));
            stop = naiapp_query_ModuleNumber(moduleCnt, DEF_LVDT_MODULE, &module);
            if (stop != NAI_TRUE)
            {
               check_status(naibrd_GetModuleName(cardIndex, module, &moduleID));
               if ((moduleID != 0))
               {
                  Run_LVDT_Summary(cardIndex, module, moduleID);
               }
            }
         }
      }
   }

   naiapp_access_CloseAllOpenCards();
   return 0;
}

After module selection, Run_LVDT_Summary() calls naibrd_LVDT_GetChannelCount() to determine how many channels the installed module supports, then hands off to the command loop in Cfg_LVDT_Channel().

maxchannel = naibrd_LVDT_GetChannelCount(modid);
if (maxchannel == 0)
{
   naiif_printf(" *** Module selection not recognized as LVDT module. ***\r\n\r\n");
}
else
{
   Cfg_LVDT_Channel(cardIndex, module, maxchannel);
}

  • modid — the module ID returned by naibrd_GetModuleName().

  • naibrd_LVDT_GetChannelCount() — returns 0 if the module ID does not match a known LVDT module type.

Program Structure

Application Parameters

The sample stores connection and module context in an naiapp_AppParameters_t struct:

naiapp_AppParameters_t  lvdtparams;
p_naiapp_AppParameters_t lvdtParams = &lvdtparams;

lvdtParams->cardIndex = cardIndex;
lvdtParams->module = module;
lvdtParams->maxChannels = MaxChannel;
lvdtParams->channel = chan;

  • cardIndex — identifies the board.

  • module — the slot containing the LVDT module.

  • maxChannels — the channel count for the installed module.

  • channel — the channel selected for interrupt operations. This is queried once when entering the command loop.

In your own application, you will track these same values however is convenient — the struct is a sample convenience, not an API requirement.

Command Menu

The sample presents three commands through its menu system:

Command Menu Label Operation

INT

LVDT Configure Interrupt

Configure interrupt on the selected channel

STAT

LVDT Display Status

Display latched BIT and summary status for all channels

CLEAR

LVDT Clear Status

Clear all latched status registers across all channels

The menu system is a sample convenience — in your own code, call these API functions directly. The command table and menu handling use the standard naiapp_cmdtbl_params_t pattern shared across all SSK 2.x samples.

Display Configuration

Reading Latched Status

To read the latched fault status for every channel on an LVDT module in your own application, call naibrd_LVDT_GetChanMappedStatus() with each status type. The sample reads two status registers per channel:

nai_status_bit_t statusBit;

for (chan = 1; chan <= lvdtParams->maxChannels; chan++)
{
   check_status(naibrd_LVDT_GetChanMappedStatus(cardIndex, module, chan,
      NAIBRD_LVDT_CHAN_MAPPED_STATUS_BIT_LATCHED, &statusBit));

   check_status(naibrd_LVDT_GetChanMappedStatus(cardIndex, module, chan,
      NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED, &statusBit));
}

  • cardIndex — identifies the board.

  • module — the slot containing the LVDT module.

  • chan — the channel number (1-based).

  • NAIBRD_LVDT_CHAN_MAPPED_STATUS_BIT_LATCHED — the latched built-in test status. Reads 1 if the channel has detected a BIT failure since the status was last cleared.

  • NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED — the latched summary status. Reads 1 if a BIT fault has been detected on this channel. This is the aggregated fault indicator.

The sample also reads raw status words using naibrd_LVDT_GetChanMappedStatusRaw() to display the entire register in hexadecimal, giving a consolidated view of all channels at once.

Understanding the Summary Register

The summary register provides a consolidated view of all fault conditions on a channel. Rather than polling BIT status separately for each channel, you can check the summary bit — if it reads 1, at least one fault condition exists. This is particularly useful in applications that monitor many channels and need a fast way to detect any fault.

A latched summary bit remains set until you explicitly clear it by writing a 1 to the corresponding bit position.

Clearing Latched Status

To clear all latched status registers in your own application, call naibrd_LVDT_ClearChanMappedStatusRaw() for each status type with a bitmask of 0xFFFFFFFF to clear all channels at once:

status = check_status(naibrd_LVDT_ClearChanMappedStatusRaw(cardIndex, module,
   NAIBRD_LVDT_CHAN_MAPPED_STATUS_BIT_LATCHED, 0xFFFFFFFFu));
if (status == NAI_SUCCESS)
{
   status = check_status(naibrd_LVDT_ClearChanMappedStatusRaw(cardIndex, module,
      NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED, 0xFFFFFFFFu));
}

The sample clears both status types (BIT and summary). The order matters — if you clear summary without clearing the underlying BIT status, the summary bit may reassert on the next status scan. Clear both to ensure a clean state.

Important

Common Errors

  • Summary bit reasserts after clearing — If the underlying fault condition (BIT) is still active, the summary bit will reassert. Clear BIT status as well, or resolve the underlying hardware condition.

  • NAI_ERROR_NOT_SUPPORTED — The module at the selected slot is not a recognized LVDT module type. Verify the module type with naibrd_LVDT_GetChannelCount().

Optional Interrupt Setup

The sample provides optional interrupt configuration on the summary status register. When enabled, the module generates a hardware interrupt whenever a summary status bit transitions, rather than requiring your application to poll the status registers.

Note
 The interrupt callback mechanism requires POSIX thread support. This sample is available on Petalinux and VxWorks but not on DEOS. Consult the SSK 2.x Software Development Guide for platform-specific build configuration.

Configuring the Interrupt

To set up an interrupt on the summary status register in your own application, call the following sequence of API functions:

uint32_t vector = 0xB0u;

/* Step 1: Connect the ISR callback (once per card) */
check_status(naibrd_ConnectISR(cardIndex, SampleCallBack));

/* Step 2: Set trigger type to edge */
check_status(naibrd_LVDT_SetChanMappedInterruptTriggerType(cardIndex, module, chan,
   NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED, NAIBRD_INT_TRIGGER_TYPE_EDGE));

/* Step 3: Steer interrupts to the on-board ARM processor */
check_status(naibrd_LVDT_SetChanMappedInterruptSteering(cardIndex, module,
   NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED, NAIBRD_INT_STEERING_ONBOARD_ARM));

/* Step 4: Set the interrupt vector */
check_status(naibrd_LVDT_SetChanMappedInterruptVector(cardIndex, module,
   NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED, vector));

/* Step 5: Enable the interrupt on the selected channel */
check_status(naibrd_LVDT_SetChanMappedInterruptEnable(cardIndex, module, chan,
   NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED, NAI_TRUE));

  • naibrd_ConnectISR() — registers your callback function with the NAI interrupt subsystem. Call this once per card, not once per interrupt type. The callback receives the interrupt vector as its argument.

  • NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED — specifies which status register the interrupt is tied to. This sample uses the summary register so that a single interrupt fires for any fault type on the channel.

  • NAIBRD_INT_TRIGGER_TYPE_EDGE — the interrupt fires on a status transition (0 to 1), not while the status is held high. Edge triggering is the typical choice for latched status registers.

  • NAIBRD_INT_STEERING_ONBOARD_ARM — routes the interrupt to the on-board ARM processor. Other steering options include PCIe or VME backplane delivery.

  • vector — the interrupt vector value (0xB0 in this sample). Your callback receives this value so it can identify which interrupt source fired.

  • The final SetChanMappedInterruptEnable() call arms the interrupt on the specified channel. Until this call, the interrupt is configured but will not fire.

Interrupt Callback

The sample provides a minimal callback that logs the interrupt vector:

static void SampleCallBack(uint32_t vector)
{
   NAIBSP_UNREFERENCED_PARAMETER(vector);

#if defined (NAIBSP_CONFIG_SOFTWARE_OS_VXWORKS)
   logMsg("Interrupt Received!!! Vector:0x%x\n Clear Status to receive new interrupt!!!\r\n",
      vector, 0, 0, 0, 0, 0);
#endif
}

In your own application, the callback is where you would read status registers to identify the fault, log the event, or signal a processing thread. Keep the callback short — perform extended processing outside the ISR context.

Note
 On VxWorks, the callback uses logMsg() because printf() is not safe in interrupt context. On Petalinux, the callback body is empty in this sample because the status is read through the menu commands. In your own application, use interrupt-safe I/O functions within the callback.

For background on interrupt concepts — including edge vs. level triggering, interrupt vector numbering, steering architecture, and latency measurement — see the Interrupts API Guide.

Important

Common Errors

  • Interrupt does not fire — The most common cause is missing one of the five configuration steps. All five calls (connect ISR, set trigger type, set steering, set vector, enable) must succeed before the interrupt will fire.

  • Interrupt fires once but not again — With edge triggering, the interrupt fires on the 0-to-1 transition. You must clear the latched status to allow the next transition to trigger a new interrupt.

  • Callback not invoked on Petalinux — Verify that the ISR connection was successful. Check that the steering is set to NAIBRD_INT_STEERING_ONBOARD_ARM.

Troubleshooting Reference

This table summarizes common errors and symptoms covered in the sections above. For detailed context on each entry, refer to the relevant section. Consult your module’s manual (LD1-LD5 Manual) for hardware-specific diagnostic procedures.

Error / Symptom Possible Causes Suggested Resolution

No board found or connection timeout

Board not powered, incorrect or missing configuration file, network issue

Verify hardware is powered and connected. If default_LVDT_Summary.txt exists, check that it lists the correct interface and address. If it does not exist, the board menu will appear — configure and save your connection settings.

Module not detected at selected slot

No module installed at the specified slot, incorrect module number entered

Verify hardware configuration and module slot assignment

Module not recognized as LVDT

Module ID does not match a known LVDT type — wrong slot selected or non-LVDT module installed

Select a different module slot. Verify that an LD1-LD5 module is installed at the selected position.

NAI_ERROR_NOT_SUPPORTED

Feature not available for this module type, or calling an LVDT function on a non-LVDT module

Check your module type with naibrd_LVDT_GetChannelCount(). Consult your module’s manual for supported features.

Summary bit reasserts after clearing

Underlying BIT fault still active

Clear BIT status along with summary status. If the condition persists, resolve the hardware fault.

Interrupt does not fire

Missing one or more interrupt configuration steps (ISR connect, trigger type, steering, vector, enable)

Verify all five configuration calls completed successfully. Check that steering is set to NAIBRD_INT_STEERING_ONBOARD_ARM.

Interrupt fires once but not again

Latched status not cleared after first interrupt

Clear the latched summary status to allow the next edge transition to trigger a new interrupt.

Full Source

The complete source for this sample is provided below for reference. The sections above explain each part in detail.

Full Source — lvdt_summary.c (SSK 2.x) 
/* nailib include files */
#include "nai_libs/nailib/include/naitypes.h"
#include "nai_libs/nailib/include/nailib.h"
#include "nai_libs/nailib/include/nailib_utils.h"

/* naibrd include files */
#include "nai_libs/naibrd/include/naibrd.h"
#include "nai_libs/naibrd/include/functions/naibrd_lvdt.h"

/* naiif include files */
#include "nai_libs/naiif/include/naiif_stdio.h"

/* Common Sample Program include files */
#include "nai_sample_apps/naiapp_common/include/naiapp_boardaccess_menu.h"
#include "nai_sample_apps/naiapp_common/include/naiapp_boardaccess_query.h"
#include "nai_sample_apps/naiapp_common/include/naiapp_boardaccess_access.h"
#include "nai_sample_apps/naiapp_common/include/naiapp_boardaccess_display.h"
#include "nai_sample_apps/naiapp_common/include/naiapp_boardaccess_utils.h"

#if defined (NAIBSP_CONFIG_SOFTWARE_OS_VXWORKS)
#include "logLib.h"
#endif
static const int8_t *DEF_CONFIG_FILE = (const int8_t *)"default_LVDT_Summary.txt";

/* Function prototypes */
static int32_t Run_LVDT_Summary(int32_t cardIndex, int32_t module, uint32_t modid);
static void Cfg_LVDT_Channel(int32_t cardIndex, int32_t module, int32_t MaxChannel);
static void Verify_LVDT_ParamCnt(int32_t paramCnt);
static nai_status_t Display_LVDT_Status(int32_t paramCnt, int32_t* p_params);
static nai_status_t Clear_LVDT_Status(int32_t paramCnt, int32_t* p_params);
static nai_status_t Configure_LVDT_Interrupt(int32_t paramCnt, int32_t* p_params);
static void SampleCallBack(uint32_t vector);

static const int32_t DEF_LVDT_CARD_INDEX    = 0;
static const int32_t DEF_LVDT_MODULE        = 1;
static const int32_t DEF_LVDT_CHANNEL       = 1;

/****** Command Table *******/
enum lvdt_basic_interrupt_commands
{
   LVDT_SUMMARY_INTERRUPT_CMD_CONFIGURE,
   LVDT_SUMMARY_INTERRUPT_CMD_STATUS_READ,
   LVDT_SUMMARY_INTERRUPT_CMD_STATUS_CLEAR,
   LVDT_SUMMARY_INTERRUPT_CMD_COUNT
};

/****** Command Tables *******/
static naiapp_cmdtbl_params_t LVDT_SummaryMenuCmds[] = {
   {"INT",      "LVDT Configure Interrupt",    LVDT_SUMMARY_INTERRUPT_CMD_CONFIGURE,         Configure_LVDT_Interrupt},
   {"STAT",     "LVDT Display Status",         LVDT_SUMMARY_INTERRUPT_CMD_STATUS_READ,       Display_LVDT_Status},
   {"CLEAR",    "LVDT Clear Status",           LVDT_SUMMARY_INTERRUPT_CMD_STATUS_CLEAR,      Clear_LVDT_Status}
};

/**************************************************************************************************************/
/**
 * <summary>
 * The purpose of the lvdt_summary example is to illustrate the methods to call in the naibrd library to
 * perform basic operations with LVDT modules for interrupt configuration, reading fault statuses
 * including the summary status register, and clearing status bits. The summary register is bit-mapped
 * by channel (bit index zero is channel 1) and reports a '1' if the corresponding channel has
 * detected a fault (including BIT). A latched summary bit can be cleared by writing a '1' to the bit.
 * </summary>
 */
/**************************************************************************************************************/
#if defined (NAIBSP_CONFIG_SOFTWARE_OS_VXWORKS)
int32_t lvdt_summary(void)
#else
int32_t main(void)
#endif
{
   int32_t cardIndex;
   int32_t moduleCnt;
   int32_t module;
   bool_t stop = NAI_FALSE;
   uint32_t moduleID;
   int8_t inputBuffer[80];
   int32_t inputResponseCnt;

   if (naiapp_RunBoardMenu(DEF_CONFIG_FILE) == (bool_t)NAI_TRUE)
   {
      while (stop != NAI_TRUE)
      {
         /* Select Card Index */
         stop = naiapp_query_CardIndex(naiapp_GetBoardCnt(), DEF_LVDT_CARD_INDEX, &cardIndex);
         if (stop != NAI_TRUE)
         {
            check_status(naibrd_GetModuleCount(cardIndex, &moduleCnt));

            /* Select Module */
            stop = naiapp_query_ModuleNumber(moduleCnt, DEF_LVDT_MODULE, &module);
            if (stop != NAI_TRUE)
            {
               check_status(naibrd_GetModuleName(cardIndex, module, &moduleID));
               if ((moduleID != 0))
               {
                  Run_LVDT_Summary(cardIndex, module, moduleID);
                  naiif_printf("\r\nType Q to quit or Enter to continue:\r\n");
                  stop = naiapp_query_ForQuitResponse(sizeof(inputBuffer), NAI_QUIT_CHAR, inputBuffer, &inputResponseCnt);
               }
            }
         }
      }
   }

   naiif_printf("\r\nType the Enter key to exit the program: ");
   naiapp_query_ForQuitResponse(sizeof(inputBuffer), NAI_QUIT_CHAR, inputBuffer, &inputResponseCnt);
   naiapp_access_CloseAllOpenCards();
   return 0;
}
/**************************************************************************************************************/
/**
 * <summary>
 * Verify_LVDT_ParamCnt verifies parameter count and displays error message if invalid.
 * </summary>
 */
 /**************************************************************************************************************/
static void Verify_LVDT_ParamCnt(int32_t paramCnt)
{
   if (paramCnt != APP_PARAM_COUNT)
   {
      naiif_printf(" *** Parameter count specified is incorrect!!! ***\r\n");
   }
}
/**************************************************************************************************************/
/**
 * <summary>
 * Run_LVDT_Summary prompts the user for the card, module and channel to use for the application and calls
 * Cfg_LVDT_Channel if the card, module, and channel specified are all valid for the LVDT module.
 * </summary>
 */
/**************************************************************************************************************/
static int32_t Run_LVDT_Summary(int32_t cardIndex, int32_t module, uint32_t modid)
{
   bool_t bQuit = NAI_FALSE;
   int32_t maxchannel;

   if (!bQuit)
   {
      maxchannel = naibrd_LVDT_GetChannelCount(modid);
      if (maxchannel == 0)
      {
         naiif_printf(" *** Module selection not recognized as LVDT module. ***\r\n\r\n");
      }
      else
      {
         Cfg_LVDT_Channel(cardIndex, module, maxchannel);
      }
   }
   return cardIndex;
}

/**************************************************************************************************************/
/**
 * <summary>
 * Cfg_LVDT_Channel handles calling the Display_LVDT_ChannelCfg routine to display the LVDT channel
 * configuration and calling the routines associated with the user's menu commands.
 * </summary>
 */
/**************************************************************************************************************/
static void Cfg_LVDT_Channel(int32_t cardIndex, int32_t module, int32_t MaxChannel)
{
   bool_t bQuit = NAI_FALSE;
   bool_t bContinue = NAI_TRUE;
   bool_t bCmdFound = NAI_FALSE;
   int32_t chan, defaultchan = 1;   /* This is channel selection for interrupt only */
   int32_t cmd;
   int8_t inputBuffer[80];
   int32_t inputResponseCnt;

   naiapp_AppParameters_t  lvdtparams;
   p_naiapp_AppParameters_t lvdtParams = &lvdtparams;

   while (bContinue)
   {
      naiif_printf("\r\n\r\n");
      naiif_printf("Channel selection for Interrupt\r\n");
      naiif_printf("=================\r\n");
      defaultchan = DEF_LVDT_CHANNEL;

      bQuit = naiapp_query_ChannelNumber(MaxChannel, defaultchan, &chan);
      lvdtParams->cardIndex = cardIndex;
      lvdtParams->module = module;
      lvdtParams->maxChannels = MaxChannel;
      lvdtParams->channel = chan;

      naiapp_utils_LoadParamMenuCommands(LVDT_SUMMARY_INTERRUPT_CMD_COUNT, LVDT_SummaryMenuCmds);
      while (bContinue)
      {
         naiapp_display_ParamMenuCommands((int8_t *)"LVDT Summary Interrupt Menu");
         naiif_printf("\r\nType LVDT command or %c to quit : ", NAI_QUIT_CHAR);
         bQuit = naiapp_query_ForQuitResponse(sizeof(inputBuffer), NAI_QUIT_CHAR, inputBuffer, &inputResponseCnt);
         if (!bQuit)
         {
            if (inputResponseCnt > 0)
            {
               bCmdFound = naiapp_utils_GetParamMenuCmdNum(inputResponseCnt, inputBuffer, &cmd);
               if (bCmdFound)
               {
                  switch (cmd)
                  {
                  case LVDT_SUMMARY_INTERRUPT_CMD_CONFIGURE:
                  case LVDT_SUMMARY_INTERRUPT_CMD_STATUS_READ:
                  case LVDT_SUMMARY_INTERRUPT_CMD_STATUS_CLEAR:
                     LVDT_SummaryMenuCmds[cmd].func(APP_PARAM_COUNT, (int32_t*)lvdtParams);
                     break;
                  default:
                     naiif_printf("Invalid command entered\r\n");
                     break;
                  }
               }
               else
               {
                  naiif_printf("Invalid command entered\r\n");
               }
            }
         }
         else
         {
            bContinue = NAI_FALSE;
         }
      }
   }
}

/**************************************************************************************************************/
/**
 * <summary>
 * Display_LVDT_Status illustrates the methods to call in the naibrd library to retrieve the status states.
 * </summary>
 */
/**************************************************************************************************************/
static nai_status_t Display_LVDT_Status(int32_t paramCnt, int32_t* p_params)
{
   p_naiapp_AppParameters_t lvdtParams = (p_naiapp_AppParameters_t)p_params;
   int32_t cardIndex = lvdtParams->cardIndex;
   int32_t module = lvdtParams->module;
   int32_t chan;
   nai_status_bit_t statusBit;
   uint32_t rawValue;
   Verify_LVDT_ParamCnt(paramCnt);

   naiif_printf("\r\n");
   naiif_printf("  --------Latched Status---------\r\n");
   naiif_printf("   Chan      BIT       SUMMARY   \r\n");
   naiif_printf("  ------ ---------- -------------\r\n");

   for (chan = 1; chan <= lvdtParams->maxChannels; chan++)
   {
      naiif_printf("  %3i   ", chan);

      check_status(naibrd_LVDT_GetChanMappedStatus(cardIndex, module, chan, NAIBRD_LVDT_CHAN_MAPPED_STATUS_BIT_LATCHED, &statusBit));
      naiif_printf("    %3i   ", statusBit);

      check_status(naibrd_LVDT_GetChanMappedStatus(cardIndex, module, chan, NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED, &statusBit));
      naiif_printf("      %3i   ", statusBit);

      naiif_printf("\r\n");
   }

   /* Print status words in hex */
   naiif_printf("  All   ");

   check_status(naibrd_LVDT_GetChanMappedStatusRaw(cardIndex, module, NAIBRD_LVDT_CHAN_MAPPED_STATUS_BIT_LATCHED, &rawValue));
   naiif_printf(" 0x%08X ", rawValue);

   check_status(naibrd_LVDT_GetChanMappedStatusRaw(cardIndex, module, NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED, &rawValue));
   naiif_printf(" 0x%08X ", rawValue);

   naiif_printf("\r\n\r\n");

   return NAI_SUCCESS;
}

static nai_status_t Clear_LVDT_Status(int32_t paramCnt, int32_t* p_params)
{
   nai_status_t status = NAI_ERROR_NOT_SUPPORTED;
   p_naiapp_AppParameters_t lvdtParams = (p_naiapp_AppParameters_t)p_params;
   int32_t cardIndex = lvdtParams->cardIndex;
   int32_t module = lvdtParams->module;
   Verify_LVDT_ParamCnt(paramCnt);

   status = check_status(naibrd_LVDT_ClearChanMappedStatusRaw(cardIndex, module, NAIBRD_LVDT_CHAN_MAPPED_STATUS_BIT_LATCHED, 0xFFFFFFFFu));
   if (status == NAI_SUCCESS)
   {
      status = check_status(naibrd_LVDT_ClearChanMappedStatusRaw(cardIndex, module, NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED, 0xFFFFFFFFu));
   }

   if (status == NAI_SUCCESS)
   {
      naiif_printf("Cleared all statuses...\r\n");
   }

   return status;
}

static nai_status_t Configure_LVDT_Interrupt(int32_t paramCnt, int32_t* p_params)
{
   p_naiapp_AppParameters_t lvdtParams = (p_naiapp_AppParameters_t)p_params;
   int32_t cardIndex = lvdtParams->cardIndex;
   int32_t module = lvdtParams->module;
   int32_t chan = lvdtParams->channel;   /* Channel to generate interrupt on */
   uint32_t vector = 0xB0u;
   Verify_LVDT_ParamCnt(paramCnt);

   /* Specify callback function for interrupt type */
   check_status(naibrd_ConnectISR(cardIndex, SampleCallBack)); /* Invoked once per card, not per interrupt type */
   check_status(naibrd_LVDT_SetChanMappedInterruptTriggerType(cardIndex, module, chan, NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED,
         NAIBRD_INT_TRIGGER_TYPE_EDGE));
   check_status(naibrd_LVDT_SetChanMappedInterruptSteering(cardIndex, module, NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED,
         NAIBRD_INT_STEERING_ONBOARD_ARM));
   check_status(naibrd_LVDT_SetChanMappedInterruptVector(cardIndex, module, NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED, vector));
   check_status(naibrd_LVDT_SetChanMappedInterruptEnable(cardIndex, module, chan, NAIBRD_LVDT_CHAN_MAPPED_STATUS_SUMMARY_LATCHED, NAI_TRUE));

   naiif_printf("\r\nInterrupt Configuration\r\n");
   naiif_printf("=======================\r\n");
   naiif_printf("Card Index:%d\r\n", cardIndex);
   naiif_printf("Module Number:%d\r\n", module);
   naiif_printf("Channel:%d\r\n", chan);
   naiif_printf("Vector:0x%X\r\n", vector);
   naiif_printf("Status:Summary\r\n");
   naiif_printf("\r\n\r\n Waiting for Summary Latched interrupt on channel %d...\r\n", chan);

   return NAI_SUCCESS;
}

static void SampleCallBack(uint32_t vector)
{
   NAIBSP_UNREFERENCED_PARAMETER(vector);

#if defined (NAIBSP_CONFIG_SOFTWARE_OS_VXWORKS)
   logMsg("Interrupt Received!!! Vector:0x%x\n Clear Status to receive new interrupt!!!\r\n",vector,0,0,0,0,0);
#endif
}
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