X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=altosui%2FAltosConvert.java;h=db7039ec5294a5dc16b8e99248a6612360fb3a0a;hb=ca036c5616c3e745c0b878ed90618d4ff710c0e5;hp=8cc1df277ecd1da2041d9c6b2d23223249635026;hpb=51c7741040d95c5deece939dae5e4136cc04afc4;p=fw%2Faltos

diff --git a/altosui/AltosConvert.java b/altosui/AltosConvert.java
index 8cc1df27..db7039ec 100644
--- a/altosui/AltosConvert.java
+++ b/altosui/AltosConvert.java
@@ -189,4 +189,67 @@ public class AltosConvert {
 	{
 		return ignite / 32767 * 15.0;
 	}
+
+	static double radio_to_frequency(int setting, int cal, int channel) {
+		double	f;
+
+		if (setting <= 0)
+			setting = cal;
+		f = 434.550 * setting / cal;
+		/* Round to nearest 50KHz */
+		f = Math.floor (20.0 * f + 0.5) / 20.0;
+		return f + channel * 0.100;
+	}
+
+	static int radio_frequency_to_setting(double frequency, int cal) {
+		double	set = frequency / 434.550 * cal;
+
+		return (int) Math.floor (set + 0.5);
+	}
+
+	static int radio_frequency_to_channel(double frequency) {
+		int	channel = (int) Math.floor ((frequency - 434.550) / 0.100 + 0.5);
+
+		if (channel < 0)
+			channel = 0;
+		if (channel > 9)
+			channel = 9;
+		return channel;
+	}
+
+	static double radio_channel_to_frequency(int channel) {
+		return 434.550 + channel * 0.100;
+	}
+
+	static int[] ParseHex(String line) {
+		String[] tokens = line.split("\\s+");
+		int[] array = new int[tokens.length];
+
+		for (int i = 0; i < tokens.length; i++)
+			try {
+				array[i] = Integer.parseInt(tokens[i], 16);
+			} catch (NumberFormatException ne) {
+				return null;
+			}
+		return array;
+	}
+
+	static double meters_to_feet(double meters) {
+		return meters * (100 / (2.54 * 12));
+	}
+
+	static double meters_to_mach(double meters) {
+		return meters / 343;		/* something close to mach at usual rocket sites */
+	}
+
+	static double meters_to_g(double meters) {
+		return meters / 9.80665;
+	}
+
+	static int checksum(int[] data, int start, int length) {
+		int	csum = 0x5a;
+		for (int i = 0; i < length; i++)
+			csum += data[i + start];
+		return csum & 0xff;
+	}
 }