altosui: Add configuration UI for beeper tone

[fw/altos] / altoslib / AltosConvert.java

diff --git a/altoslib/AltosConvert.java b/altoslib/AltosConvert.java
index 35923ec3c3dbd1308e2f6d75b1959fcc760efa71..4ed45c6869a045c0b7df6025fd9cd1daa36751e6 100644 (file)
--- a/altoslib/AltosConvert.java
+++ b/altoslib/AltosConvert.java
@@ -359,4 +359,16 @@ public class AltosConvert {
                        csum += data[i + start];
                return csum & 0xff;
        }
+
+       public static double beep_value_to_freq(int value) {
+               if (value == 0)
+                       return 4000;
+               return 1.0/2.0 * (24.0e6/32.0) / (double) value;
+       }
+
+       public static int beep_freq_to_value(double freq) {
+               if (freq == 0)
+                       return 94;
+               return (int) Math.floor (1.0/2.0 * (24.0e6/32.0) / freq + 0.5);
+       }
 }