Basic stamp tokenizer

k lee · 2009-09-24 07:56

I have tried to make a compiler with c# for the BS2 Basic Stamp. I was able
to get the Tokenizer working and the port control working but I do
not know what format to send the data down to the BS2 controller.

Unsoundcode · 2009-09-24 12:44

Hi, you say you have the Tokenizer working so if you have a tokenized version of your Stamp program you have probably done the hardest part.

The Tokenizer documents describe how to download the tokenized program and it consists of a reset , Stamp identification and then writing the tokenized code to the Stamp's EEPROM.

Each write is an eighteen byte packet which consists of a 1 byte EEPROM address , 16 byte data and 1 byte checksum.

Here is an example of something I have used for the reset and the ID routines using VB

Private Sub reset()
        _port.DtrEnable = True
        Thread.Sleep(2)
        _port.DtrEnable = False
        _port.BreakState = True
        Thread.Sleep(52)
        _port.BreakState = False
        Thread.Sleep(50)
        _port.ReadExisting()
End Sub

  Private Sub ID_BS2()
        _port.Write("B")
       / Wait for 2 byte reply
        _port.Write("S")
       / Wait for 2 byte reply
        _port.Write(2)
       / Wait for 2 byte reply
        _port.Write(Chr(0))

       / Wait for 2 byte reply

 End Sub

That is followed by the write routine , I believe I had a 50 mSec pause between each write , I'm not sure whether thats neccessary or not.

Jeff T.

k lee · 2009-09-26 03:28

Thank you Jeff T.
Actually, I made reset and ID check program.
How can I make eighteen byte packet?
[noparse][[/noparse]Each write is an eighteen byte packet which consists of a 1 byte EEPROM address , 16 byte data and 1 byte checksum.]
do I have to send EEPROM data to BS2 controller?
I tryied to send Packetbuffer to BS2 controller.
give me a advice.

Unsoundcode · 2009-09-27 19:41

Hi , the application that I use does not use the tokenizer dll , I take a Stamp *.obj file , parse it and download.

Jeff T.

·

Tracy Allen · 2009-09-27 20:43

k lee,
Here is PBASIC code snippet that shows how to form the packet. That's right, one BASIC Stamp can be used to program another one. The formation of the packet would be the same in C#
You can find more information here.

      FOR ix=0 TO 127 ' send 128 blocks of 16 bytes
                        ' total 2048 bytes
                        ' can be modified to send only
                        ' occupied blocks (per ALT-M).
        cksm=ix+128     ' initialize checksum
                        ' first block is adrs 128.
        SEROUT td,$4054,[noparse][[/noparse]ix+128]  ' send block adrs.
        FOR jx=0 TO 15  ' 16 bytes per block.
           READ ix*16+jx,bite      ' get byte from adrs.
           cksm=cksm+bite          ' update checksum.
           SEROUT td,$4054,[noparse][[/noparse]bite]  ' xmit byte to clone.
        NEXT            ' next byte.
        SEROUT td,$4054,[noparse][[/noparse]-cksm//256]    ' xmit checksum, note the math twos comp mod 256
                ' now, target programs this eeprom block
                ' which usually takes 3-4 milliseconds.
                ' It returns a 0-1-0 pulse (ascii null, high pulse 0.9375 millisecond)
                ' when it is ready for next block.
        PULSIN rd,1,handshake        ' wait for handshake, 9 bit periods 0.9375 milisecond high, could wait for ascii null
        IF handshake=0 THEN failed   ' failed if no handshake, communication error,

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Tracy Allen
www.emesystems.com

k lee · 2009-09-28 01:50

According to 'Using the PBASIC Tokenizer Library(ver 1.23)' from Parallax,
Packetbuffer is actual packet data to download to the BASIC stamp. and this data begins at element 0 and
constists of packets of 18 bytes each.
ELEMENT 0...17 : Packet number 1
...
ELEMENT 2286...2303 : Packet number 128

This means I should donwload packetbuffer to Basic stamp.
If it is correct, I have some question.

PBASIC program ;

' {$STAMP BS2}
' {$PORT COM3}
' {$PBASIC 2.5}

x var word
here:
for x = 1 to 100
pulsout 8, 500
pause 10
next
pause 500
for x = 1 to 100
pulsout 8, 1000
pause 10
next

pause 500
goto here

And I programmed c# as follows, it just download part, and Packetcount was 4;

unsafe void Compile_button_Click(object sender, EventArgs e)
{

bool ret;

TModuleRec tModRec = new TModuleRec();

string s = richTextBox1.Text;

tModRec.SourceSize = (int)(s.Length);

ret = tokenizer_compile(&tModRec, s, false, true, null);

MessageBox.Show(ret.ToString());

SerialPort SP = new SerialPort("COM3", 9600, Parity.None, 8, StopBits.One);

SP.Open();
SP.DtrEnable = true;
SP.BreakState = true;
Thread.Sleep(2);
SP.DtrEnable = false;
Thread.Sleep(36);
SP.BreakState = false;
Thread.Sleep(20);
SP.DiscardInBuffer();

SP.WriteLine("B");
SP.DiscardInBuffer();
SP.ReadLine();
Console.WriteLine(SP.ReadByte());
SP.WriteLine("S");
SP.DiscardInBuffer();
SP.ReadLine();
Console.WriteLine(SP.ReadByte());
SP.WriteLine("2");
SP.DiscardInBuffer();
SP.ReadLine();
Console.WriteLine(SP.ReadByte());
SP.WriteLine("0");
SP.DiscardInBuffer();
SP.ReadByte();
Console.WriteLine(SP.ReadByte());

byte[noparse]/noparse p0 = new byte[noparse][[/noparse]72];

for (i = 0; i < 72; i++)
{
richTextBox2.Text += "$" + System.Convert.ToString(tModRec.PacketBuffer, 16);
p0[noparse][[/noparse]i] += tModRec.PacketBuffer[noparse][[/noparse]i];
}

SP.Write(p0, 0, 18);
SP.DiscardInBuffer();
SP.ReadByte();
Console.WriteLine(SP.ReadByte());

SP.Write(p0, 18, 18);
SP.DiscardInBuffer();
SP.ReadByte();
Console.WriteLine(SP.ReadByte());

SP.Write(p0, 36, 18);
SP.DiscardInBuffer();
SP.ReadByte();
Console.WriteLine(SP.ReadByte());

SP.Write(p0, 54, 18);
SP.DiscardInBuffer();
SP.ReadByte();
Console.WriteLine(SP.ReadByte());

SP.WriteLine("0");

MessageBox.Show(SP.ReadExisting());
SP.Close();
}

motor dosn't work and console shows as follows;
190
173
206
0
64
232
51

Please, give me an advice.

Post Edited (k lee) : 9/28/2009 2:04:41 AM GMT

Basic stamp tokenizer

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