altosui: Add configuration UI for beeper tone

[fw/altos] / altoslib / AltosConvert.java

diff --git a/altoslib/AltosConvert.java b/altoslib/AltosConvert.java
index 8f214c8b40c7a80fc6778a3b6806e471b76b7ad6..4ed45c6869a045c0b7df6025fd9cd1daa36751e6 100644 (file)
--- a/altoslib/AltosConvert.java
+++ b/altoslib/AltosConvert.java
@@ -224,10 +224,21 @@ public class AltosConvert {
                return sensor / 32767.0 * supply * 127/27;
        }
 
-       static double easy_mini_voltage(int sensor) {
-               double  supply = 3.0;
+       static double easy_mini_voltage(int sensor, int serial) {
+               double  supply = 3.3;
+               double  diode_offset = 0.0;
 
-               return sensor / 32767.0 * supply * 127/27;
+               /* early prototypes had a 3.0V regulator */
+               if (serial < 1000)
+                       supply = 3.0;
+
+               /* Purple v1.0 boards had the sensor after the
+                * blocking diode, which drops about 150mV
+                */
+               if (serial < 1665)
+                       diode_offset = 0.150;
+
+               return sensor / 32767.0 * supply * 127/27 + diode_offset;
        }
 
        public static double radio_to_frequency(int freq, int setting, int cal, int channel) {
@@ -348,4 +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);
+       }
 }