Mindboards

Hi Folks,

Please forgive the noob-ness of this question.
I drive linux and have just managed to install the NXC firmware (128) and use nexttool to /COM=usb -download=showgyro.rxe ... the source for which is:

task main() {
unsigned int gyro = 5555;
repeat(100) {
gyro = SensorRaw(S1);
NumOut(0, 0, gyro);
Wait(1000);
}
}

I only see "0" on the screen ... ie: the SensorRaw(S1) is apparently only ever returning 0.
I have the HiTechnic gyro plugged into my brick's port #1.
I'm hoping this is easy for someone who knows what they're doing to spot.

Thanks in advance,
tc.

I don't have a gyro sensor, so I'm just winging it here. However, the NXC Programmer's Guide (which you should get familiar with) has the following example that my apply to your situation.
Two things to note: you need to initialize the sensor with SetSensorHTGyro and you need to supply and offset to get the sensor value.

Thanks for the reply Morton.
I was following code from the HiTechnic site: http://www.hitechnic.com/cgi-bin/commer ... ey=NGY1044
which reads:
The output of the Gyro Sensor can read from NXC by reading the sensor as shown in the following example.
NXC Example code
#define GYRO_PORT IN_3 //Gyro on port 3
#define GYRO_Offset 602 //offset value to apply to the output value
long Gyro_value;
..
Gyro_value=SensorRaw(GYRO_PORT)-GYRO_Offset; //read the gyro sensor
..
I don't know why they use "IN_3" as the port address to send to SensorRaw because the NXC documentation seems to suggest that it is expecting a (#define) value like S1-S4.
I note that your example uses the "SetSensorHTGyro" call. I was thinking that I wouldn't have to do that sort of thing because I'm trying to read the raw value and because I don't understand where why NXC would know about the HT Gyro natively, but I'm excited that it does.
I was in fact looking at the 1900 page NXC programmer's guide, but it didn't occur to me that it would know about the HT Gyro, so I only searched for SensorRaw ... Now I see the calls you reference, so I'll try using them.

Thanks,
tc.