public static void Start(Handshake handshake)
{
int nWritten;
// Note: zeros must be sent first to help the receiver sync after the noise generated
// by the port initialization - don't send the important stuff right away...!
byte[] start = { 0 };
if (handshake == Handshake.None)
{
Debug.Print("***** Testing No Flow Control *****");
start = new byte[] { 0, 0, 0, 0, 0, (byte)'X', (byte)'2', (byte)'3', (byte)'\r', (byte)'\n', 0 };
}
else if (handshake == Handshake.XOnXOff)
{
Debug.Print("***** Testing SW Flow Control *****");
start = new byte[] { 0, 0, 0, 0, 0, (byte)'X', (byte)'2', (byte)'4', (byte)'\r', (byte)'\n', 0 };
}
else if (handshake == Handshake.RequestToSend)
{
Debug.Print("***** Testing HW Flow Control *****");
start = new byte[] { 0, 0, 0, 0, 0, (byte)'X', (byte)'2', (byte)'5', (byte)'\r', (byte)'\n', 0 };
}
SerialPortTest app = new SerialPortTest();
byte[] Record = new byte[c_BufferSize];
UInt32 uiRecordNumber = 0x1323; // Starting record number (pulled from a hat)
SerialPort hPort = new SerialPort("COM1", (int)BaudRate.Baudrate115200);
hPort.Handshake = handshake;
hPort.ReadTimeout = 500;
hPort.Open();
hPort.Flush();
while (0 < hPort.Read(Record, 0, Record.Length)) ;
// Note:
// When a hardware reset is issued to some targets prior to a deploy, the original deployed
// code begins to execute for a second or two before Visual Studio is able to gain control,
// halt the old deployed code and deploy the current program.
// The following two second delay is to prevent this app from issuing the start record prior
// to VS gaining control. Otherwise, the PC side app will get the signal to start before
// the target side app has even deployed. This will result in the loss of the first three
// or four data records and the test will fail.
Thread.Sleep(2000);
// Send out a simple signal to show the PC side test software that we're ready to go
hPort.Write(start, 0, start.Length);
// Test COM port handshake by flooding the port with testable sequential records
// and verifying that the records arrive correctly. The handshake is verified
// by causing 5 second pauses during reading which should translate to five
// second pauses in the transmit as well - unless the driver buffer is obviating
// the need for handshake - in which case, the buffer should be diminished or the
// volume of traffic should increase until handshake must be employed.
for (int i = 0; i < c_NumRecords; i++)
{
if (!app.ReceiveRecord(hPort, Record)) // If there were problems
{
Debug.Print("There were problems with test #1, record #" + toString(i + 1) + " of " + toString(c_NumRecords));
// return; // We may as well quit now
}
//Debug.Print(AsString(Record));
//Debug.Print(new string(System.Text.UTF8Encoding.UTF8.GetChars(Record)));
if (!app.CheckRecord(uiRecordNumber, Record)) // If there were problems
{
Debug.Print("There were problems with test #1, record #" + toString(i + 1) + " of " + toString(c_NumRecords));
//return; // We may as well quit now
}
uiRecordNumber++; // Next record
}
for (int i = 0; i < c_NumRecords; i++)
{
app.CreateRecord(uiRecordNumber, Record);
//Debug.Print("\nSending Record: " + uiRecordNumber);
//Debug.Print(new string(System.Text.UTF8Encoding.UTF8.GetChars(Record)));
if(!app.SendRecord(hPort, Record)) // If there were problems
{
Debug.Print("There were problems with test #2, record #" + toString(i + 1) + " of " + toString(c_NumRecords));
return; // We may as well quit now
}
uiRecordNumber++;
}
// This is just like the previous test - except that a gap of five seconds
// will be inserted before receiving the rest of the records which will
// hopefully hold off transmission due to a functioning handshake.
for (int i = 0; i < 5; i++)
{
if (!app.ReceiveRecord(hPort, Record)) // If there were problems
{
Debug.Print("There were problems with test #3, record #" + toString(i + 1) + " of 5");
return; // We may as well quit now
}
if (!app.CheckRecord(uiRecordNumber, Record)) // If there were problems
{
return; // We may as well quit now
}
uiRecordNumber++; // Next record
}
Thread.Sleep(5000); // Do not allow reception of characters for five seconds (simulate erasing FLASH or some such)
for (int i = 0; i < (c_NumRecords - 5); i++)
{
if (!app.ReceiveRecord(hPort, Record)) // If there were problems
{
Debug.Print("There were problems with test #4, record #" + toString(i + 1) + " of " + toString(c_NumRecords - 5));
return; // We may as well quit now
}
if (!app.CheckRecord(uiRecordNumber, Record)) // If there were problems
{
byte[] CRecord = new byte[c_BufferSize];
app.CreateRecord(uiRecordNumber, CRecord);
Debug.Print("got: " + AsString(Record));
Debug.Print("exp: " + AsString(CRecord));
Debug.Print("There were problems with test #4, record #" + toString(i + 1) + " of " + toString(c_NumRecords - 5));
return; // We may as well quit now
}
uiRecordNumber++; // Next record
}
// During this test, the receiving unit will hopefully hold off which will
// cause this transmission to also (hopefully) report the same holdoff
for (int i = 0; i < c_NumRecords; i++)
{
app.CreateRecord(uiRecordNumber, Record);
if (!app.SendRecord(hPort, Record)) // If there were problems
{
Debug.Print("There were problems with test #5, record #" + toString(i + 1) + " of " + toString(c_NumRecords));
return; // We may as well quit now
}
uiRecordNumber++;
}
Debug.Print("All records apparently sent and received as expected");
hPort.Dispose();
GC.WaitForPendingFinalizers();
}
public static void Start(Handshake handshake)
{
int nWritten;
// Note: zeros must be sent first to help the receiver sync after the noise generated
// by the port initialization - don't send the important stuff right away...!
byte[] start = { 0 };
if (handshake == Handshake.None)
{
Debug.Print("***** Testing No Flow Control *****");
start = new byte[] { 0, 0, 0, 0, 0, (byte)'X', (byte)'2', (byte)'3', (byte)'\r', (byte)'\n', 0 };
}
else if (handshake == Handshake.XOnXOff)
{
Debug.Print("***** Testing SW Flow Control *****");
start = new byte[] { 0, 0, 0, 0, 0, (byte)'X', (byte)'2', (byte)'4', (byte)'\r', (byte)'\n', 0 };
}
else if (handshake == Handshake.RequestToSend)
{
Debug.Print("***** Testing HW Flow Control *****");
start = new byte[] { 0, 0, 0, 0, 0, (byte)'X', (byte)'2', (byte)'5', (byte)'\r', (byte)'\n', 0 };
}
SerialPortTest app = new SerialPortTest();
byte[] Record = new byte[c_BufferSize];
UInt32 uiRecordNumber = 0x1323; // Starting record number (pulled from a hat)
SerialPort hPort = new SerialPort("COM1", (int)BaudRate.Baudrate115200);
hPort.Handshake = handshake;
hPort.ReadTimeout = 500;
hPort.Open();
hPort.Flush();
while (0 < hPort.Read(Record, 0, Record.Length))
{
;
}
// Note:
// When a hardware reset is issued to some targets prior to a deploy, the original deployed
// code begins to execute for a second or two before Visual Studio is able to gain control,
// halt the old deployed code and deploy the current program.
// The following two second delay is to prevent this app from issuing the start record prior
// to VS gaining control. Otherwise, the PC side app will get the signal to start before
// the target side app has even deployed. This will result in the loss of the first three
// or four data records and the test will fail.
Thread.Sleep(2000);
// Send out a simple signal to show the PC side test software that we're ready to go
hPort.Write(start, 0, start.Length);
// Test COM port handshake by flooding the port with testable sequential records
// and verifying that the records arrive correctly. The handshake is verified
// by causing 5 second pauses during reading which should translate to five
// second pauses in the transmit as well - unless the driver buffer is obviating
// the need for handshake - in which case, the buffer should be diminished or the
// volume of traffic should increase until handshake must be employed.
for (int i = 0; i < c_NumRecords; i++)
{
if (!app.ReceiveRecord(hPort, Record)) // If there were problems
{
Debug.Print("There were problems with test #1, record #" + toString(i + 1) + " of " + toString(c_NumRecords));
// return; // We may as well quit now
}
//Debug.Print(AsString(Record));
//Debug.Print(new string(System.Text.UTF8Encoding.UTF8.GetChars(Record)));
if (!app.CheckRecord(uiRecordNumber, Record)) // If there were problems
{
Debug.Print("There were problems with test #1, record #" + toString(i + 1) + " of " + toString(c_NumRecords));
//return; // We may as well quit now
}
uiRecordNumber++; // Next record
}
for (int i = 0; i < c_NumRecords; i++)
{
app.CreateRecord(uiRecordNumber, Record);
//Debug.Print("\nSending Record: " + uiRecordNumber);
//Debug.Print(new string(System.Text.UTF8Encoding.UTF8.GetChars(Record)));
if (!app.SendRecord(hPort, Record)) // If there were problems
{
Debug.Print("There were problems with test #2, record #" + toString(i + 1) + " of " + toString(c_NumRecords));
return; // We may as well quit now
}
uiRecordNumber++;
}
// This is just like the previous test - except that a gap of five seconds
// will be inserted before receiving the rest of the records which will
// hopefully hold off transmission due to a functioning handshake.
for (int i = 0; i < 5; i++)
{
if (!app.ReceiveRecord(hPort, Record)) // If there were problems
{
Debug.Print("There were problems with test #3, record #" + toString(i + 1) + " of 5");
return; // We may as well quit now
}
if (!app.CheckRecord(uiRecordNumber, Record)) // If there were problems
{
return; // We may as well quit now
}
uiRecordNumber++; // Next record
}
Thread.Sleep(5000); // Do not allow reception of characters for five seconds (simulate erasing FLASH or some such)
for (int i = 0; i < (c_NumRecords - 5); i++)
{
if (!app.ReceiveRecord(hPort, Record)) // If there were problems
{
Debug.Print("There were problems with test #4, record #" + toString(i + 1) + " of " + toString(c_NumRecords - 5));
return; // We may as well quit now
}
if (!app.CheckRecord(uiRecordNumber, Record)) // If there were problems
{
byte[] CRecord = new byte[c_BufferSize];
app.CreateRecord(uiRecordNumber, CRecord);
Debug.Print("got: " + AsString(Record));
Debug.Print("exp: " + AsString(CRecord));
Debug.Print("There were problems with test #4, record #" + toString(i + 1) + " of " + toString(c_NumRecords - 5));
return; // We may as well quit now
}
uiRecordNumber++; // Next record
}
// During this test, the receiving unit will hopefully hold off which will
// cause this transmission to also (hopefully) report the same holdoff
for (int i = 0; i < c_NumRecords; i++)
{
app.CreateRecord(uiRecordNumber, Record);
if (!app.SendRecord(hPort, Record)) // If there were problems
{
Debug.Print("There were problems with test #5, record #" + toString(i + 1) + " of " + toString(c_NumRecords));
return; // We may as well quit now
}
uiRecordNumber++;
}
Debug.Print("All records apparently sent and received as expected");
hPort.Dispose();
GC.WaitForPendingFinalizers();
}