I am trying to read an analog pin with java on the Beaglebone (A6 - running Angstrom). When I type “cat /sys/devices/platform/omap/tsc/ain6” when ssh-ed in I get a number. But when I compile the code below on the Beaglebone and run it I get NULLs. Am I opening or reading from the location in the wrong way?
I additionally want to be able to set some digital pins (as I can in cloud9) so as to control a multiplexer. I have searched and found very little information for Java that reads/writes the pins on Beaglebone. Is there anywhere with examples of doing this sort of thing?
import java.io.*;
class matrix_test {
//AnalogRead: /sys/devices/platform/omap/tsc/ain6
public static void main(String[] args) {
System.out.println(“Starting matrix_test”);
try {
FileInputStream analog = new FileInputStream("/sys/devices/platform/omap/tsc/ain6");
DataInputStream in = new DataInputStream(analog);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;
//Read File Line By Line
while (true) {
strLine = br.readLine();
// Print the content on the console
System.out.println(strLine);
}
}
catch (Exception e) { //Catch exception if any
System.err.println("Error: " + e.getMessage());
}
//Close the input stream
//in.close();
}
}