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Hello I am having a problem with the code below. The Delphi & BX-24 codes appears to work ok except for the following. I seem to be getting 0's sent to the BX-24 (or the BX-24 is picking up false data somewhere) which causes false data readings. I inserted "If Dat > 0 then" into the BX-24 code and all seemed to be ok. Here's the problem with the "If Dat > 0 then" in the BX-24 code when I need to send a legitimate 0 to the BX-24 I can no longer receive the 0 Does anyone know what is going on here and can you advise on a better way of doing this or cleaning up the code? Delphi Program--------------------------------- --------------------- procedure TForm1.Button1Click(Sender: TObject); var b : integer begin listbox1.clear; b := 255; ComPort.Write(b, 2); // Sent 255 to BX-24 - BX-24 sends back data end; procedure TForm1.Button2Click(Sender: TObject); var b : integer; begin If edit5.text <> '' then begin b := 254; ComPort.Write(b, 2); //Send 254 to BX-24, BX-24 waits for following data b := StrToInt(edit5.text); ComPort.Write(b, 2); //Data send to BX-24 stored in external eeprom end; end; procedure TForm1.ComPortRxChar(Sender: TObject; Count: Integer); var str : string; begin ComPort.ReadStr(Str, Count); //Data from BX-24 ListBox1.Items.Add(Str); end; BX-24 Program--------------------------------- -------------------- Dim ICom(1 to 30) As Byte Dim OCom(1 to 30) As Byte Dim Str As String Sub Main() Dim b as Byte 'Dim n as Integer Dim Dat as Byte Call OpenQueue(ICom, 30) Call OpenQueue(OCom, 30) Call OpenCom(1, 4800, ICom, OCom) Do 'BX-24 loops looking for 254 or 255 If StatusQueue(ICom) then 'data in ICom Call GetQueue(ICom, b, 1) 'get the data from ICom If b = 255 then '255 found Dat = SPIEEPROMRead(0) 'read data at ext eeprom address 0 into Dat Str = CStr(Dat) 'convert Dat to Str Call PutQueueStr(OCom, Str) 'send data (OCom) to PC (Delphi) Call ClearQueue(ICom) 'clear ICom End If If b = 254 then '254 found Call ClearQueue(ICom) 'clear ICom Do 'loop looking for next data If StatusQueue(ICom) then 'data in ICom Call GetQueue(ICom, Dat, 1) 'get the data from ICom If Dat > 0 then 'Inserted this to stop false 0's Call SPIEEPROMWrite(0, Dat) 'write Dat to ext eeprom at address 0 Exit Do 'data found and written, get out of loop End If End If Loop End If End If Loop End Sub Thank you William |
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BX-24 to and from Delphi problem
Started by ●March 22, 2004
Reply by ●March 22, 20042004-03-22
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Whoops The comments seem to cause a problem so here is the code again. Delphi Program---------- procedure TForm1.Button1Click(Sender: TObject); var b : integer begin listbox1.clear; b := 255; ComPort.Write(b, 2); end; procedure TForm1.Button2Click(Sender: TObject); var b : integer; begin If edit5.text <> '' then begin b := 254; ComPort.Write(b, 2); b := StrToInt(edit5.text); ComPort.Write(b, 2); end; end; procedure TForm1.ComPortRxChar(Sender: TObject; Count: Integer); var str : string; begin ComPort.ReadStr(Str, Count); ListBox1.Items.Add(Str); end; BX-24 Program------------------------------ Dim ICom(1 to 30) As Byte Dim OCom(1 to 30) As Byte Dim Str As String Sub Main() Dim b as Byte 'Dim n as Integer Dim Dat as Byte Call OpenQueue(ICom, 30) Call OpenQueue(OCom, 30) Call OpenCom(1, 4800, ICom, OCom) Do If StatusQueue(ICom) then Call GetQueue(ICom, b, 1) If b = 255 then Dat = SPIEEPROMRead(0) Str = CStr(Dat) Call PutQueueStr(OCom, Str) Call ClearQueue(ICom) End If If b = 254 then Call ClearQueue(ICom) Do If StatusQueue(ICom) then Call GetQueue(ICom, Dat, 1) If Dat > 0 then Call SPIEEPROMWrite(0, Dat) Exit Do End If End If Loop End If End If Loop End Sub Thank you William |
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Reply by ●March 22, 20042004-03-22
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Hi. I haven't used Delfi, but... What does the following statement do? ComPort.Write(b, 2); As b is defined as integer (normally 2 bytes) I wouldn't be suprised if it sends 00 FF (or FF 00) for 255 and 00 FE (or FE 00) for 254. Just a guess where the zero comes from. Rgds Ingvar |
Reply by ●March 22, 20042004-03-22
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Ingvar Talk about sleeping at the wheel! You hit it right on the head! Thanks very much! William ----- Original Message ----- From: "Ingvar Esk" <> To: <> Sent: Monday, March 22, 2004 1:37 PM Subject: [BasicX] Re: BX-24 to and from Delphi problem > Hi. > > I haven't used Delfi, but... > > What does the following statement do? > > ComPort.Write(b, 2); > > As b is defined as integer (normally 2 bytes) I wouldn't be suprised > if it sends 00 FF (or FF 00) for 255 and 00 FE (or FE 00) for 254. > > Just a guess where the zero comes from. > > Rgds > Ingvar > > > Yahoo! Groups Links |
