fixing voltage read problem

afsk/main.c

@@ -117,8 +117,11 @@ struct SensorData read_sensor_data(struct SensorConfig sensor) {
     int twos = twosToInt(valuec1, 16);  // currently doesn't read negative currents correctly
     float valuec3  = (float)(twos);
     data.current  = valuec3 / (float)sensor.currentDivider;
-    uint16_t value2 = (uint16_t)wiringPiI2CReadReg16(sensor.fd, INA219_REG_BUSVOLTAGE);
-    data.voltage  =  ((double)(value2 >> 3) * 4) / 1000;
+//    uint16_t value2 = (uint16_t)wiringPiI2CReadReg16(sensor.fd, INA219_REG_BUSVOLTAGE);
+//    data.voltage  =  ((double)(value2 >> 3) * 4) / 1000;
+    valuec1 = wiringPiI2CReadReg16(sensor.fd, INA219_REG_BUSVOLTAGE);
+    data.voltage  =  ((double)((uint16_t)valuec1 >> 3) * 4) / 1000;
+
     data.power   = (float)((uint16_t)wiringPiI2CReadReg16(sensor.fd, INA219_REG_POWER)) * (float)sensor.powerMultiplier;	
 
     return data;