BUG: RobotC + EOPD in Long Range mode is broken

mightor · Fri Jan 04, 2013 1:16 pm

I'm nothing if not persistent, so here's another bug report.

The HT EOPD sensor has two modes, Short Distance and Long Distance. These modes are activated by configuring the port and a sensorLightInactive and sensorLightActive respectively.
The results I get with the sensor in short distance mode are totally consistent with what I see in NXT-G (see post here: viewtopic.php?p=6378#p6378).

However, when the port is configured as sensorLightActive, the readings are completely off. I did some testing with 3 programs, NXT-G, NXC and finally RobotC. The sensor was placed in the same position each time and the object that was measured against was moved along a delineated underground.


	Code: Dist NXC NXT RobotC 1 248 241 821 2 748 740 200 3 878 879 21 4 933 931 0 5 962 962 0 6 980 982 0 7 992 996 0 8 1001 1004 0 9 1007 1010 0 10 1012 1014 0 11 1014 1016 0 12 1015 1018 0 13 1017 1019 0 14 1017 1020 0 15 1019 1021 0

Above are the results of the distance vs raw value tests. These are the programs I used:
The NXC program:


	Code: task main() { int x = 0; SetSensorType(IN_1, IN_TYPE_LIGHT_ACTIVE); Wait(100); SetSensorMode(IN_1, SENSOR_MODE_RAW); Wait(100); while (true) { ClearScreen(); x = SensorRaw(IN_1); NumOut(0, LCD_LINE1, x); Wait(100); } }

The RobotC program:


	Code: task main() { int x = 0; SetSensorType(S1, sensorLightActive); wait1Msec(100); SetSensorMode(S1, modeRaw); wait1Msec(100); while(true) { eraseDisplay(); x = SensorRaw[S1]; nxtDisplayTextLine(0, "%4d", x); wait1Msec(100); } }

As you can see the programs are pretty much the same. However, the results are not as can be seen from the graph below:

Could one of the developers please respond to this? It is rendering the EOPD sensor unusable in Long Range mode.

Regards,
Xander

BUG: RobotC + EOPD in Long Range mode is broken

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