softtrig.c

rt采集卡dos下dm6430驱动源代码

/***************************************************************************

	FILE NAME: SOFTTRIG.C

	FILE DESCRIPTION: SOFTTRIG (Software Triggering)

	 Sample program that demonstrates how to trigger an analog to digital
	 conversion using a software trigger.

	 This simple program samples from the A/D board using software triggering.
	 The acquired data is displayed on the screen.

	PROJECT NAME: SOFTTRIG (Part of DM6430 DOS Driver)

	DRIVER VERSION: 1.1

	COMPILER: Borland C++ 3.1

	TARGET: Real-Mode DOS

	Copyright 2003 RTD Embedded Technologies

***************************************************************************/

#include <conio.h>
#include <dos.h>

#include "drvr6430.h"
#include "dio5812.h"

/***************************************************************************
  Defines

  Change these constants to alter the program parameters.
****************************************************************************/


#define BASE_ADDRESS 768               // Base address of DM6430.
#define CHANNEL 0                      // A/D channel.
#define GAIN    0                      // Gain.
#define SE_DIFF 0                      // Single-ended
#define ADSLOPE (65536.0/20.0)         // Number Bits divided by AD Range.

/***************************************************************************
  SetProgramScreen()

  The SetProgramScreen() function initializes the screen.
****************************************************************************/

void SetProgramScreen(void)
{
  clrscr();

  // Print header and footer.
  gotoxy(1,1);   cprintf(TitleString6430());
  gotoxy(43, 1); cprintf("Single conversions, software trigger");
  gotoxy(1, 25); cprintf("Press any key to exit. . .");

  window(1, 3, 80, 23);
  gotoxy(25, 8); cprintf("Channel %d :           Volts", CHANNEL + 1);
} //SetProgramScreen

int main(void)
{
  int ADData;
  float Data;                          // Variable to store acquired data.

  SetProgramScreen();

  SetBaseAddress(BASE_ADDRESS);
  InitBoard6430();                     // Board initializing.
  SetConversionSelect6430(0);				// Set conversion select to software.
  SetChannelGain6430(CHANNEL, GAIN, SE_DIFF); // Set channel and gain.
  ClearADFIFO6430();							// Clear A/D fifo.

  while ( !kbhit() ) {                 // Run untill any key is pressed.
	 StartConversion6430();             // Perform a Single A/D conversion.

	 while ( IsADFIFOEmpty6430() );     // Wait until data is ready to read.

	 ADData = ReadADData6430();         // Read acquired data
	 Data = (float)ADData / ADSLOPE;    // Convert Data to voltages.
	 gotoxy(37, 8); cprintf("%6.3f", Data);
													// Display 'Data' on the screen.
  } //while
  getch();                             // Get the pressed character.


  window(1,1,80,25);                   // Reset original screen coordinates,
  clrscr();                            // clears the screen.
  return 0;
} //main