Android Basic Alternative

[spcw1234]

I can't get this to work Hoping you can help me! When I run this very simple android program with prefix I get an almost immediate error "Unfortunately, Bluetooth Example has stopped" and the program closes. I am using the Bluetooth chat example to simply display my data in the chat window. I have very limited serial communication experience. With the prefix disabled I get the data as expected, so the communication is good.

This is the Android routine where I switch between prefix or no prefix mode.

Sub Activity_Create(FirstTime As Boolean)
	Activity.LoadLayout("2")
	If AStream.IsInitialized = False Then	
		AStream.InitializePrefix(Main.serial1.InputStream, True, Main.serial1.OutputStream, "AStream")
'		AStream.Initialize(Main.Serial1.InputStream, Main.Serial1.OutputStream, "AStream") 'NO PREFIX MODE
	End If
	txtLog.Width = 100%x
End Sub

I tried a few variations here with no luck

Sub AStream_NewData (Buffer() As Byte)
	LogMessage("You", BytesToString(Buffer, 0, Buffer.Length, "UTF8"))
'	Incoming= BytesToString(Buffer, 0, Buffer.Length, "ISO8859_1")
'	LogMessage("You", BytesToString(Buffer, 0, Buffer.Length, "ISO8859_1"))
End Sub

My code on an 18F4620 with internal 8mhz osc. I assume I have the prefix correct.

define DEBUG_REG PORTC
define DEBUG_BIT 6
define DEBUG_BAUD 9600
define DEBUG_MODE 0

A1          var byte
A2          var byte
A3          var byte
A4          var byte
prefix1     var byte    
prefix2     var byte
prefix3     var byte
prefix4     var byte

  A1=11
  A2=22
  A3=33
  A4=44
  
  Prefix1=23 'http://mothereff.in/byte-counter  11,22,33,44,11,22,33,44
  Prefix2=0
  Prefix3=0
  Prefix4=0

main:
 pause 1000
 debug Prefix1,Prefix2,Prefix3,Prefix4,dec2 A1,",",dec2 A2,",",dec2 A3,",",dec2 A4,",",dec2 A1,",",dec2 A2,",",dec2 A3,",",dec2 A4
 pause 1000 
goto main

end

[Tobias]

Use this line

AStream.InitializePrefix(serial1.InputStream, False, serial1.OutputStream, "AStream")

instead of

AStream.InitializePrefix(Main.serial1.InputStream, True, Main.serial1.OutputStream, "AStream")

The False part I bet fixes your problem.

[spcw1234]

Use this line

AStream.InitializePrefix(serial1.InputStream, False, serial1.OutputStream, "AStream")

I finally found time this weekend to play with this some more and did get it working! Thanks for your help Tobias!

[spcw1234]

My very simple working code:

OSCCON=%01110000            ' SET TO 8 MHZ internal oscillator
DEFINE OSC 08               ' 8MHZ clock speed 
DEFINE HSER_BAUD  9600      ' Set baud rate
DEFINE HSER_RCSTA 90h
DEFINE HSER_CLROERR 1       ' Clear overrun error upon
DEFINE HSER_TXSTA 24h       ' Set transmit status and control register
DEFINE HSER_SPBRG 51        ' 9600 Bauds

RPM      var word
SPEED    var word
TPS      var byte
volts    var byte
adc1     var word
adc2     var word
prefix1  var byte    
prefix2  var byte
prefix3  var byte
prefix4  var byte

rpm     = 3800
speed   = 60
tps     = 10
volts   = 122
ADC1    = 512
ADC2    = 200
Prefix1 = 22  
Prefix2 = 0
Prefix3 = 0
Prefix4 = 0

main:
  pause 500
  hserout [Prefix1,Prefix2,Prefix3,Prefix4,dec5 rpm, dec3 speed, dec3 TPS, dec3 volts, dec4 adc1, dec4 adc2] 
goto main  

end

Sub Process_Globals
	Dim AStream As AsyncStreams	
	Dim Incoming As String
	Dim RPM As Int 
	Dim SPEED As Int 
	Dim TPS	As Double 
	Dim VOLTS As Int 
	Dim ADC1 As Int
	Dim ADC2 As Int 
End Sub

Sub Activity_Create(FirstTime As Boolean)
	Activity.LoadLayout("2")
	  If AStream.IsInitialized = False Then	
		AStream.InitializePrefix(Main.Serial1.InputStream, False, Main.Serial1.OutputStream, "AStream") 
	  End If
	Update_Display 
End Sub

Sub AStream_NewData (Buffer() As Byte)
	Log( BytesToString(Buffer, 0, Buffer.Length, "ISO8859_1"))
	Incoming = BytesToString(Buffer, 0, Buffer.Length, "ISO8859_1")
	
	RPM   = (Incoming.SubString2(0,5))
	SPEED = (Incoming.SubString2(5,8))
	TPS   = (Incoming.SubString2(8,11))
	VOLTS = (Incoming.SubString2(11,14))	
	ADC1  = (Incoming.SubString2(14,18))
	ADC2  = (Incoming.SubString2(18,22))

	Update_Display 
End Sub

[Demon]

Thanks for the working example. Can you explain the complete setup? That HSEROUT goes to what, an external bluetooth module?

This would make an excellent article with some narrative explaining what is going on, hardware/software requirements, etc.

Robert

[spcw1234]

The hserout goes to a RN42 bluetooth modem. Could be done with debug as shown in an earlier post. Once paired it isn't much different than any other serial connection, but the Android side of things takes some time to wrap your head around. The prefix is a pain, but works very well once working. It is basically just a 32 bit header detailing the number of bytes in the serial string.

[Demon]

Can we control to what device we want to talk to via that header?

Let's say to transmit one thing to my cell phone and another to my daughter's?

[Tobias]

Good to hear you got it sorted out.

I have to say if you are turning 3800 at 60MPH, you might need to look at changing rear gears

I finally found time this weekend to play with this some more and did get it working! Thanks for your help Tobias!

[Charlie]

Just thought I should bring this thread up to date... In the end I gave up on the alternatives, and I broke down and bought Basic4Android since it seems to be the most mature thing out there. If anybody is interested in a 50% off coupon code, you can use this " dqqshs " You go to their purchase page and hit the "Plimus" button, then enter the code.

[Demon]

I'm debating which version to get, Enterprise $99 at 50%?

Bang for buck looks good.

Which are you getting?

(Just checking so I can copy your code )

Robert