FreeBasic and RS232

Boas tardes, in recent times I've dedicated myself a little programming in FreeBasic (http://www.freebasic.net) and, one of the programs I did was to send messages through a GSM modem (mobile phone, Broadband stick, etc), but it had always a problem, If by chance the COM port that the program caused error, and as in most cases they use virtual ports, is a problem too often… I decided to try to solve the problem and there was light 🙂 !

Então aqui vai o programa:

Dim Shared RS232_MUTEX As Any Ptr Dim Shared RS232_IN As String Dim Shared RS232_OUT As String Dim Shared RS232_COMM As String Dim Shared RS232_STATUS As UByte Dim Shared RS232_FILE As Integer Dim Shared RS232_IN_SUB As Any Ptr Dim Shared RS232_OUT_SUB As Any Ptr Private Dim Shared done As UByte Private Sub rs232insub Dim temp As String = ""
RS232_MUTEX = Mutexcreate Sleep 20,1
While 1
If RS232_STATUS = 0 Then Exit Sub Line Input #RS232_FILE, temp If temp <> "" Then Mutexlock RS232_MUTEX RS232_IN = RS232_IN + temp Mutexunlock RS232_MUTEX temp = ""
End If Wend End Sub Private Sub rs232outsub Print #RS232_FILE, RS232_OUT done = 1
End Sub Function RS232_ERR_STR(err_n As UByte) As String Select Case err_n Case 0
Return "No error"
Case 1
Return "Can't Open - Its Open"
Case 2
Return "Invalid COMM Port - No COMM"
Case 3
Return "Invalid COMM Port - Can't Open"
Case 4
Return "Nothing to send"
Case 5
Return "Send Time-OUT"
Case 5
Return "Receive Time-OUT - Specific String"
Case 6
Return "Receive Specific String Found"         

Case Else Return "Unknown Error"
End Select End Function Function RS232_OPEN As UByte If RS232_STATUS = 1 Then Return 1
If RS232_COMM = "" Then Return 2  

RS232_FILE = Freefile Open Com (RS232_COMM)For Binary As #RS232_FILE If Err <> 0 Then Return 3

RS232_STATUS = 1

Rem start Input Sub RS232_IN_SUB = Threadcreate(@rs232insub)
End Function Sub RS232_CLOSE RS232_STATUS = 0
Threadwait ( RS232_IN_SUB )
RS232_IN = ""
RS232_OUT = ""
RS232_COMM = ""
delete RS232_IN_SUB delete RS232_OUT_SUB Mutexdestroy RS232_MUTEX End Sub Function RS232_SEND (timeout As Double) As UByte done = 0
If RS232_STATUS = 0 Then Return 1
If RS232_OUT = "" Then Return 4
RS232_OUT_SUB = Threadcreate(@rs232outsub)
Dim start As Double start = Timer Sleep 10,1
Do Sleep 1, 1
If done = 1 Then Rem delete RS232_OUT_SUB Return 0
End If Loop Until (Timer - Start) > timeout delete RS232_OUT_SUB Return 5
End Function Function RS232_GET As String Dim temp As String Mutexlock RS232_MUTEX temp = RS232_IN RS232_IN = ""
Mutexunlock RS232_MUTEX Return temp End Function Function RS232_GET_STR(fSTR As String,timeout As Double) As UByte If RS232_STATUS = 0 Then Return 1
If RS232_OUT = "" Then Return 4
Dim start As Double start = Timer Do If Instr(RS232_IN,fSTR) <> 0 Then Return 6
Sleep 50, 1
Loop Until (Timer - Start) > timeout Return 5
End Function Function RS232_GET_STR2(fSTR As String,fSTR1 As String,timeout As Double) As UByte If RS232_STATUS = 0 Then Return 1
If RS232_OUT = "" Then Return 4
Dim start As Double start = Timer Do If Instr(RS232_IN,fSTR) <> 0 Then Return 6
If Instr(RS232_IN,fSTR1) <> 0 Then Return 6
Sleep 50, 1
Loop Until (Timer - Start) > timeout Return 5
End Function

E a parte de teste:

RS232_COMM = "COM11: 57600,N,8,1,BIN,DS0"
Print "a tentar abrir a com11"
Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET RS232_OUT = " ATZ0 "   Chr (13,10) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET Print " desliga o usb " Sleep RS232_OUT = "AT"   Chr (10,13) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",10)) Sleep rs232_close Sleep Skriv RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv utförs ut RS232_GET RS232_OUT = "ATZ0"   Chr (13,10) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv ut görs Skriv RS232_GET Skriv ut "desliga o usb" Sleep RS232_OUT = "AT"   Chr (10,13) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 10)) Sleep rs232_close Sleep(RS232_OPEN)
RS232_OUT = "AT" + Chr(10,13)
Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET RS232_OUT = " ATZ0 "   Chr (13,10) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET Print " desliga o usb " Sleep RS232_OUT = "AT"   Chr (10,13) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",10)) Sleep rs232_close Sleep Skriv RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv utförs ut RS232_GET RS232_OUT = "ATZ0"   Chr (13,10) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv ut görs Skriv RS232_GET Skriv ut "desliga o usb" Sleep RS232_OUT = "AT"   Chr (10,13) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 10)) Sleep rs232_close Sleep(RS232_SEND(20))
Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET RS232_OUT = " ATZ0 "   Chr (13,10) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET Print " desliga o usb " Sleep RS232_OUT = "AT"   Chr (10,13) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",10)) Sleep rs232_close Sleep Skriv RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv utförs ut RS232_GET RS232_OUT = "ATZ0"   Chr (13,10) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv ut görs Skriv RS232_GET Skriv ut "desliga o usb" Sleep RS232_OUT = "AT"   Chr (10,13) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 10)) Sleep rs232_close Sleep(RS232_GET_STR("OK",1))
Print done Print RS232_OUT = RS232_GET "ATZ0"  + Chr(13,10)
Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET RS232_OUT = " ATZ0 "   Chr (13,10) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET Print " desliga o usb " Sleep RS232_OUT = "AT"   Chr (10,13) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",10)) Sleep rs232_close Sleep Skriv RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv utförs ut RS232_GET RS232_OUT = "ATZ0"   Chr (13,10) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv ut görs Skriv RS232_GET Skriv ut "desliga o usb" Sleep RS232_OUT = "AT"   Chr (10,13) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 10)) Sleep rs232_close Sleep(RS232_SEND(20))
Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET RS232_OUT = " ATZ0 "   Chr (13,10) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET Print " desliga o usb " Sleep RS232_OUT = "AT"   Chr (10,13) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",10)) Sleep rs232_close Sleep Skriv RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv utförs ut RS232_GET RS232_OUT = "ATZ0"   Chr (13,10) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv ut görs Skriv RS232_GET Skriv ut "desliga o usb" Sleep RS232_OUT = "AT"   Chr (10,13) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 10)) Sleep rs232_close Sleep(RS232_GET_STR("OK",1))
Print done Print RS232_GET Print "turn off usb"
Sleep RS232_OUT = "AT" + Chr(10,13)
Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET RS232_OUT = " ATZ0 "   Chr (13,10) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET Print " desliga o usb " Sleep RS232_OUT = "AT"   Chr (10,13) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",10)) Sleep rs232_close Sleep Skriv RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv utförs ut RS232_GET RS232_OUT = "ATZ0"   Chr (13,10) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv ut görs Skriv RS232_GET Skriv ut "desliga o usb" Sleep RS232_OUT = "AT"   Chr (10,13) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 10)) Sleep rs232_close Sleep(RS232_SEND(20))
Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET RS232_OUT = " ATZ0 "   Chr (13,10) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",1)) Print done Print RS232_GET Print " desliga o usb " Sleep RS232_OUT = "AT"   Chr (10,13) Print RS232_ERR_STR ( RS232_SEND (20)) Print RS232_ERR_STR ( RS232_GET_STR (" OK ",10)) Sleep rs232_close Sleep Skriv RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv utförs ut RS232_GET RS232_OUT = "ATZ0"   Chr (13,10) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 1)) Skriv ut görs Skriv RS232_GET Skriv ut "desliga o usb" Sleep RS232_OUT = "AT"   Chr (10,13) Skriv ut RS232_ERR_STR (RS232_SEND (20)) Print RS232_ERR_STR (RS232_GET_STR ("OK", 10)) Sleep rs232_close Sleep(RS232_GET_STR("OK",10))
Sleep rs232_close Sleep

Also are here: http://www.freebasic.net/forum/viewtopic.php?t=15449

And both works in windows as in linux.

Any questions do not hesitate to ask 🙂