X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=altosui%2FAltosConvert.java;h=c2ae9a507897079970036ebef8cca8505b306e66;hp=8cc1df277ecd1da2041d9c6b2d23223249635026;hb=81bb6f42d8b859195ea5a35806c42d98ba82e8e1;hpb=51c7741040d95c5deece939dae5e4136cc04afc4

diff --git a/altosui/AltosConvert.java b/altosui/AltosConvert.java
index 8cc1df27..c2ae9a50 100644
--- a/altosui/AltosConvert.java
+++ b/altosui/AltosConvert.java
@@ -189,4 +189,35 @@ 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;
+	}
 }