TDC-GPX datasheet(37/54 Pages) AMSCO

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TDC-GPX

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

3.12 Measurement Flow

In the following we shows a typical example of register settings and measurement flow in G-Mode.

Task: Typical application laser rangefinder

Measuring Stops on 2 channels, rising and falling edge, within a window of 1 µs from Start.

//****** G-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( 0,0x00000FF);

// Rising and falling edges, Start ringoscil.

_oupd( 1,0x5050500);

// Channel adjust = 5 for each second stop channel

_oupd( 2,0x0050001);

// G-Mode, channel adjust = 5

_oupd( 3,0x0000000);

// Use differential inputs

_oupd( 4,0x6000000);

// Mtimes trig. by Start, EFlagHiZN

_oupd( 5,0x0E00080);

//StopDisStart, StartDisStart, StartOff1 = 10ns, MasterAluTrig

_oupd( 6,0x0100000);

// StartOff2 = 20ns

_oupd( 7,0x0141FB4);

// Res = 41.1523ps, Mtimer = 1µs

_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 = 1;

// Channel#

Edge = ((data & 0x0400000)>>26) + 1;

// Get edge

Time = (data & 0x3FFFFF);

// Get time Stop-Start

Printf(Chan,Edge,Time);

}

if (EF2=Low)

// Data on IFIFO2?

{

data = _inpd(9);

// Read IFIFO2

Chan = 2;

// Channel#

Edge = ((data & 0x0400000)>>26) + 5;

// Get edge

Time = (data & 0x3FFFFF);

// Get time Stop-Start

Printf(Chan,Edge,Time);

}

Alutrigger = High;

// Master reset

Alutrigger = Low;

} while(!quit)

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