TDC-GPX datasheet(30/54 Pages) AMSCO

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TDC-GPX

acam-messelectronic gmbh - Am Hasenbiel 27 - D-76297 Stutensee-Blankenloch - Germany - www.acam.de

2.11.2 Continous Measurement

Task: Typical application fluorescence spectroscopy.

Measuring a continous signal stream using the internal start-retrigger.

//****** I-Mode, endless measurement range with internal start retrigger **********

PuResN=Low;

// Power-up reset

PuResN=High;

StopDis1 = High;

// Disable inputs

StopDis2 = High;

StopDis3 = High;

StopDis4 = High;

// write configuration registers:

_oupd( 0,0x007FC81);

// Rising edges, Start ringoscil.

_oupd( 1,0x0000000);

_oupd( 2,0x0000002);

// I-Mode

_oupd( 3,0x0000000);

_oupd( 4,0x2000027);

// StartTimer = 39 -> period = 1µs, EFlagHiZN

_oupd( 5,0x02004DA);

// StopDisStart, StartOff1 = 100ns

_oupd( 6,0x0000000);

_oupd( 7,0x0281FB4);

// Res = 82.3045ps

_oupd(11,0x7FF0000);

// Any error -> ErrFlag

_oupd(12,0x4000000);

// Start# overflow to IrFlag

_oupd(14,0x0000000);

_oupd( 4,0x6400027);

// Master reset

StopDis1 = Low;

// Enable inputs

StopDis2 = Low;

StopDis3 = Low;

StopDis4 = Low;

Wait(1µs);

// Wait until Start01 is available from register 10

Sta01 = -inpd(10)& 0xFFFF

// read Sta01 = interval first int. Start – ext. Start

{

if (EF1=Low)

// Data on IFIFO1?

{

data = _inpd(8);

// Read IFIFO1

Chan = (data & 0xC000000)>>26 + 1;

// Get channel#

Start = (data & 0x3FC0000)>>18;

// Get Start#

Time = (data & 0x1FFFF)-0x4DA;

// Get time Stop-Start

if (Time<0)

// Negative time refers to next start

{

Time = Time + 1µs;

// Remap time to old start

Start = Start –1

// Correct start number

}

Printf(Chan,Start,Time);

}

if (EF2=Low)

// Data on IFIFO2?

{

data = _inpd(9);

// Read IFIFO2

Chan = ((data & 0xC000000)>>26) + 5;

// Get channel#

Start = (data & 0x3FC0000)>>18;

// Get Start#

Time = (data & 0x1FFFF)-0x4DA;

// Get time Stop-Start

if (Time<0)

// Negative time refers to next start

{

Time = Time + 1µs;

// Remap time to old start

Start = Start –1

// Correct start number

}

Printf(Chan,Start,Time);

}

} while(!quit)

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