TDC-GPX datasheet(29/54 Pages) AMSCO

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TDC-GPX

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

2.11 Measurement Flow

In the following we show two typical examples of register settings and measurement flow in I-Mode.

2.11.1 Single measurement

Task:

Measuring 8 channels within a window of 2 µs from Start.

//****** I-Mode, Stops against single Start **********

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( 4,0x6000000);

// Mtimes trig. by Start, EFlagHiZN

_oupd( 5,0x0E004DA);

//StopDisStart, StartDisStart, StartOff1 = 100ns, MasterAluTrig

_oupd( 6,0x0000000);

_oupd( 7,0x0281FB4);

// Res = 82.3045ps

_oupd(11,0x7FF0000);

// Any error -> ErrFlag

_oupd(12,0x2000000);

// Mtimer -> IrFlag

_oupd(14,0x0000000);

_oupd( 4,0x6400000);

// Master reset

StopDis1 = Low;

// Enable inputs

StopDis2 = Low;

StopDis3 = Low;

StopDis4 = Low;

{

while(IrFlag=Low);

// Check interrupt flag

while((EF1=Low)or(EF2=Low))

// Check empty flag

{

if (EF1=Low)

// Data on IFIFO1?

{

data = _inpd(8);

// Read IFIFO1

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

// Get channel#

Time = (data & 0x1FFFF);

// Get time Stop-Start

Printf(Chan,time);

}

if (EF2=Low)

// Data on IFIFO2?

{

data = _inpd(9);

// Read IFIFO2

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

// Get channel#

Time = (data & 0x1FFFF);

// Get time Stop-Start

Printf(Chan,time);

}

Alutrigger = High;

// Master reset

Alutrigger = Low;

} while(!quit)

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