//Test reading GPS.
public static void Main6()
{
//SerialPort port = new SerialPort("COM7", 9600, Parity.None, 8, StopBits.One);
//SerialPort port = new SerialPort("COM7", 250000, Parity.None, 8, StopBits.One);
SerialPort port = new SerialPort("COM12", 57600, Parity.None, 8, StopBits.One);
SerialPortInterface portInterface = new SerialPortInterface(port);
portInterface.Open();
GraphForm lat = new GraphForm("Latitude");
GraphForm lon = new GraphForm("Longitude");
lat.Visible = true;
lon.Visible = true;
byte var = 0;
int counter = 0;
byte[] bytes = new byte[80];
port.DiscardInBuffer();
while (true)
{
List<byte> bts = new List<byte>();
while (true)
{
// bts.Add(portInterface.ReadByte());
/*
byte[] buff = new byte[34];
for (int i = 0; i < 34; i++)
{
buff[i] = portInterface.ReadByte();
}
int a = 0;
a++;
*/
/**
* This is needed to prevent getting out of synch. After a restart
* the system could have already transmitted half of the data, so the first message
* after a restart will be junk. Then this will snychronize the messages after the first
* transmit.
*/
while (portInterface.ReadByte() != 'T')
{
}
//byte bb = 0;
//bb = portInterface.ReadByte();
//bb = portInterface.ReadByte();
//bb = portInterface.ReadByte();
int latitude = portInterface.ReadInt();
int longitude = portInterface.ReadInt();
int positionAcc = portInterface.ReadInt();
short fixStatus = portInterface.ReadShort();
int x = portInterface.ReadInt();
int y = portInterface.ReadInt();
int z = portInterface.ReadInt();
int b = 0;
Console.WriteLine("lat: " + latitude.ToString() + " long: " + longitude.ToString() + " pos acc " + positionAcc.ToString() + " fixStatus " + fixStatus.ToString() + " x: " + x.ToString() + " y: " + y.ToString() + " z " + z.ToString());
}
}
// /*
// bytes = new byte[80];
// for (int i = 0; i < 80; i++)
// {
// var = portInterface.ReadByte();
// bytes[i] = var;
// }
// byte b = 2;
// */
// /*
// var = portInterface.ReadByte();
// if (var == 'S')
// {
// counter = 0;
// System.Diagnostics.Debug.WriteLine("Counter " + (bytes[0] << 24 | bytes[1] << 16 | bytes[2] << 8 | bytes[3]));
// }
// else if (var == 'B')
// {
// System.Diagnostics.Debug.WriteLine("Timeout " + ((int)portInterface.ReadByte()).ToString());
// }
// else
// {
// bytes[counter++] = var;
// }
// * */
// counter++;
// /*byte[] bytes2 = new byte[28];
// for (int i = 0; i < 28; i++)
// {
// var = portInterface.ReadByte();
// bytes2[i] = var;
// }
// int b = 3;
// System.Diagnostics.Debug.WriteLine("Counter " + (bytes2[13] << 24 | bytes2[12] << 16 | bytes2[11] << 8 | bytes2[10]));
// */
// /*
// bytes [counter++] = var;
// if (counter == 3)
// {
// counter = 0;
// System.Diagnostics.Debug.WriteLine("Counter " + (bytes[0] <<24 | bytes[1] <<16 | bytes[2] << 8 | bytes[3]));
// }
// */
// /*
// if (var == 0xB5)
// {
// System.Diagnostics.Debug.WriteLine("Counter" + counter);
// counter = 1;
// }
// if (counter == 11 | counter == 12 | counter == 13 | counter == 14)
// {
// bytes[14 - counter] = var;
// bytes[counter - 11] = var;
// }
// if (counter == 15)
// {
// System.Diagnostics.Debug.WriteLine("Number" + BitConverter.ToInt32(bytes,0));
// }
// System.Diagnostics.Debug.Write((char)var);
// */
// /*
// if (var == 'S')
// {
// int bb = portInterface.ReadInt();
// System.Diagnostics.Debug.WriteLine(" Int: " + bb.ToString());
// }*/
// }
// while (var != 'S')
// {
// var = portInterface.ReadByte();
// }
// Note:The status value might come back as a large value because after restart, the value S gets sent as one of the bytes ruining the synchronization
// /*
// Read raw lat/long
// System.Diagnostics.Debug.WriteLine(portInterface.ReadInt(portInterface));
// int rwLat = portInterface.ReadInt(portInterface);
// lat.AddValueToGraph(rwLat);
// int rwLon = portInterface.ReadInt(portInterface);
// lon.AddValueToGraph(rwLon);*/
// Read raw messages
// var = 0;
// short status = portInterface.ReadShort();
// System.Diagnostics.Debug.WriteLine("status: " + status); // status
// while (var != 'S')
// {
// var = portInterface.ReadByte();
// System.Diagnostics.Debug.Write((char)var);
// }
// Read xned
// System.Diagnostics.Debug.WriteLine(portInterface.ReadFloat().ToString());
// Application.DoEvents();
//}
}
//Test reading barometer.
public static void Main44()
{
double baseAltitudeFeet = 0.0;
int counter2 = 0;
double alpha = .15;
double previousAltitudeFeet = 0.0;
bool isReady = false;
SerialPort port = new SerialPort("COM7", 9600, Parity.None, 8, StopBits.One);
SerialPortInterface portInterface = new SerialPortInterface(port);
portInterface.Open();
GraphForm rawTemp = new GraphForm("RawTemp");
GraphForm rawPress = new GraphForm("RawPress");
GraphForm temp = new GraphForm("Temp");
GraphForm press = new GraphForm("Pressure");
GraphForm alt = new GraphForm("altitude");
rawTemp.Visible = true;
rawPress.Visible = true;
temp.Visible = true;
press.Visible = true;
alt.Visible = true;
while (true)
{
int var = 0;
while (var != 'S')
{
var = portInterface.ReadByte();
}
uint rwTemp = portInterface.ReadUInt();
rawTemp.AddValueToGraph(rwTemp);
uint rwPress = portInterface.ReadUInt();
rawPress.AddValueToGraph(rwPress);
int temperature = portInterface.ReadInt();
temp.AddValueToGraph(temperature);
int pressure = portInterface.ReadInt();
//press.AddValueToGraph(pressure);
float pressure2 = portInterface.ReadFloat();
//press.AddValueToGraph(pressure2);
float zned = portInterface.ReadFloat();
press.AddValueToGraph(zned);
Application.DoEvents();
//altitude equation from: http://www.barnardmicrosystems.com/L4E_FMU_sensors.htm#Pressure
double altitudemeters = (288.15 / (6.5 / 1000.0)) * (1 - (Math.Pow((pressure / 101325.0), (6.5 / 1000.0) * (287.052 / 9.78))));
double altitudefeet = altitudemeters * 3.28084;
//*******note the barometer appears to need more time to settle
if (counter2 == 40)
{
baseAltitudeFeet = altitudefeet;
counter2 = 80;
}
else if (counter2 == 80)
{
//do nothing
}
else
{
counter2++;
}
if (isReady)
{
//Danger *** This algorithm drifts. Sometimes it takes like 10 seconds
//or more to stabalize. So you have to wait a long time before you should
//read the altitude and set it as the base altitude because of how long it takes.
//Also, as the barometer heats up, the altitude changes. This isn't good as the barometer's
//temperature will probably change throughout the flight
double altitudefeettemp = (double)(altitudefeet - baseAltitudeFeet);
altitudefeet = alpha * (altitudefeettemp) + (1 - alpha) * previousAltitudeFeet;
previousAltitudeFeet = altitudefeet;
alt.AddValueToGraph(altitudefeet);
}
else
{
altitudefeet = (double)(altitudefeet - baseAltitudeFeet);
}
if (altitudefeet < 20 && altitudefeet != 0)
{
isReady = true;
}
}
}