TDC-GPX acam messelectronic gmbh, TDC-GPX Datasheet - Page 44

• Manufacturer Part Number: TDC-GPX
• Description: Precision Time Interval Measurement
• Manufacturer: acam messelectronic gmbh

Task2: Typical application laser rangefinder
Given a Start signal with 10 kHz rate. To each Start there is an unknown number of Stops on channel 1. The
maximum range is 1 µs. The time between Stop and Start shall be measured with very high resolution, using the
LVPECL inputs.
Choice: R-Mode with quiet mode and internal Timer.
//****** R-Mode, Stop against Start **********
PuResN=Low;
PuResN=High;
StopDis1
StopDis2
StopDis3
StopDis4
_oupd( 0,0x000009F);
_oupd( 1,0x0620620);
_oupd( 2,0x0062004);
_oupd( 3,0x0000000);
_oupd( 4,0x6000100);
_oupd( 5,0x00004DA);
_oupd( 6,0x8000000);
_oupd( 7,0x0141FB4);
_oupd(11,0x7FF0000);
_oupd(12,0x2000000);
_oupd(14,0x0000000);
_oupd( 4,0x6400100);
StopDis1
StopDis2
StopDis3
StopDis4
do
{
} while(!quit)
while(IrFlag=Low);
Alutrigger
Alutrigger
wait(100ns);
while(EF1=Low)
{
}
_oupd( 4,0x6400100);
data = _inpd(8);
Time = (data & 0x7FFFFF);
Printf(Time);
acam-messelectronic gmbh - Am Hasenbiel 27 - D-76297 Stutensee-Blankenloch - Germany - www.acam.de
= High;
= High;
= High;
= High;
= Low;
= Low;
= Low;
= Low;
= High;
= Low;
// Power-up reset
// Disable inputs
// write configuration registers:
// Rising and falling edges, Start ringoscil.
// Channel adjust = 6 & 2
// G-Mode, channel adjust = 6 & 2
// Use LVPECL inpus
// EFlagHiZN, Quiet mode, Mtimer on Start
// StartOff1 = 100ns
// Power-on ECL
// Res = 27.4348ps, Mtimer = 1 µs
// Any error -> ErrFlag
// Mtimer -> Interrupt flag
// Master reset
// Enable inputs
44
// Check interrupt flag
// Trigger Alu
// Time to calculate first hit
// Check empty flag
// Read IFIFO1
// Get time Stop-Start
// Master reset
TDC-GPX