altos: Add bit-bang i2c driver

[fw/altos] / altoslib / AltosConvert.java

diff --git a/altoslib/AltosConvert.java b/altoslib/AltosConvert.java
index 63cdfa6092db2e30b2f70bb00491cde2c4ff47b5..099ea04859337bb14e0799df62d607eabc97f9d8 100644 (file)
--- a/altoslib/AltosConvert.java
+++ b/altoslib/AltosConvert.java
@@ -276,11 +276,15 @@ public class AltosConvert {
                return 3.3 * mega_adc(raw) * (5.1 + 10.0) / 10.0;
        }
 
-       static double easy_mini_2_adc(int raw) {
+       static double easy_timer_voltage(int sensor) {
+               return 3.3 * mega_adc(sensor) * (100.0 + 27.0) / 27.0;
+       }
+
+       static double easy_mini_2_adc(double raw) {
                return raw / 4095.0;
        }
 
-       static double easy_mini_1_adc(int raw) {
+       static double easy_mini_1_adc(double raw) {
                return raw / 32767.0;
        }
 
@@ -307,6 +311,26 @@ public class AltosConvert {
                return easy_mini_2_adc(sensor) * supply * 127/27;
        }
 
+       static double motor_pressure(double voltage) {
+               double  base = 0.5;
+               double  max = 4.5;
+               double  full_scale_pressure = psi_to_pa(1600);
+
+               if (voltage < base)
+                       voltage = base;
+               if (voltage > max)
+                       voltage = max;
+               return (voltage - base) / (max - base) * full_scale_pressure;
+       }
+
+       static double easy_motor_2_motor_pressure(int sensor, double ground_sensor) {
+               double  supply = 3.3;
+               double  ground_voltage = easy_mini_2_adc(ground_sensor) * supply * 15.6 / 10.0;
+               double  voltage = easy_mini_2_adc(sensor) * supply * 15.6 / 10.0;
+
+               return motor_pressure(voltage) - motor_pressure(ground_voltage);
+       }
+
        public static double radio_to_frequency(int freq, int setting, int cal, int channel) {
                double  f;