B4A Library UsbSerial library 2.0 - supports more devices

Scantech · Apr 10, 2013

Wow, Thank you Agraham.

This widens my option to play around with 9600 Baud even parity. I will give it shot. The other serial library did work with my Vag KKL but cannot change parity.

Erel · Apr 10, 2013

Great work Andrew. Thank you!

agraham · Apr 10, 2013

Hasty update to version 2.1 corrects a wrong parameter in SetParameters and exposes a new property, UsbTimeout, that may be useful in some circumstances.

skywalker34 · Apr 10, 2013

Hi Agraham,

In the description you said it is now compatible with silicon lab CP120x
isn't it better CP 210x serie you mean?

Rgds

Sky

agraham · Apr 10, 2013

Sorry, it's a typo that I will correct. It is the CP210x series that is supported - supposedly as I haven't been able to test it as I don't have any hardware.

skywalker34 · Apr 10, 2013

I try you sample code and replace "abcde" by "1" to test the firmware "Android-Arduino_Blink"

I saw the rx led on the UNO board blinking but this did'nt light on the led (pin13)

this mean that the UNO did receive something (rx blinking) for is not understand as char==49 ( ascii code for "1" in dec)

As we use serial I can't easily see what is received by the UNO board...any idea ? maybe coding UTF8 ?

agraham · Apr 10, 2013

As you can see the demo writes and reads bytes as UTF8 codes.

B4X:

Sub btnSend_Click
   astreams.Write("abcde".GetBytes("UTF8"))
End Sub

So if you substituted "1" for "abcde" I would have expected you to get 49 at the Arduino.

You can always send the bytes directly.to send a "1" as a character you would use.

B4X:

Sub btnSend_Click
   astreams.Write(Array As Byte( 49))
End Sub

Have you tried echoing back what you receive and seeing what the log shows and are you sure you got the baud rates matching? I've tested this library on my Arduino ADK through both the slave port (Atmel CDC ACM) and host port in ADK mode so I know those work with the new library, and user yog3xx is using it with an FTDI based device of some sort so it should work with those Arduinos with an FTDI slave port.

The sketch I use on the Arduino is dead simple. Try it with the original demo code.

B4X:

void setup() 
{ 
  Serial.begin(115200);
} 

void loop() 
{ 
  byte msg[64]; 
  int len;
  len = Serial.available();
  if (len > 0)
  {
    len = Serial.readBytes((char*)msg, sizeof(msg)); // readBytes seems to need a char* not a byte*
    Serial.write(msg, len);
  }
}

skywalker34 · Apr 10, 2013

I try to replace "utf8" by "ISO-8859-1" but result look same
So I place LCD and print received message on the LCD
if I send something using the "serial monitor apk" I found on play store and this print the correct code to LCD : A=>A on LCD and 1=>1 on LCD

if I use your sample code this give me dark block....

I change back to UTF8 coding......same result

I don't have the idea to send it back trough serial port and take time to wire the LCD, it was a good idea, I will try this way too

Scantech · Apr 10, 2013

The library connects fine to FTD, however no success in response from a microcontroller.

This USB Device I am using is Vag KKL. It is a interface for the Engine Controller. Requires 9600,e,8,1 which communicated fine and the Controller responded with vb6 Mscomm. In Android, I can see the echo bytes returned, but no data from Engine Controller. This particular Engine Controller requires inner byte delay with minimum 2ms.

Here is my Settings

B4X:

Sub btnOpen_Click
   If usb.UsbPresent = usb.USB_NONE Then
      Log("Msgbox - no device")
      Msgbox("No USB device or accessory detected!", "Error")
      Log("Msgbox - returned")
      Return
   End If
   Log("Checking permission")
   If (usb.HasPermission) Then
      Msgbox(usb.DeviceInfo, "Device Information")
      Dim dev As Int

      dev = usb.Open(9600)      
      If dev <> usb.USB_NONE Then
         Log("Connected successfully!")
         btnOpen.Enabled = False
         btnClose.Enabled = True
         btnSend.Enabled = True         
         astreams.Initialize(usb.GetInputStream, usb.GetOutputStream, "astreams")
         usb.SetParameters(9600, usb.DATABITS_8, usb.STOPBITS_1, usb.PARITY_EVEN)

      Else
         Log("Error opening USB port")
      End If
   Else
      usb.RequestPermission
   End If
End Sub

Here is how I send the data

B4X:

Sub btnSend_Click
   'astreams.Write("abcde".GetBytes("UTF8"))
   Dim Data, Temp As String: Data = spnCommand.GetItem(spnCommand.SelectedIndex)
   
      
   Dim x As Int
   For x = 0 To Data.Length Step 2
      If x = Data.Length Then Exit
      Temp = Data.SubString2(x, x + 2)
      Log(Temp)
      astreams.Write(Temp.GetBytes("UTF8"))
      tr.Sleep(5)
   Next
End Sub

Only Echo bytes returned. No Data from ECM. Anyone can confirm the SetParameters function is working properly? Perhaps Parity problems?

Thank you

UPDATE: It works fine. I was not sending the bytes correctly. Should not be using UTF8.

skywalker34 · Apr 10, 2013

Agraham,

Sorry, I must go to bed and have a long rest......:sign0137:
it was the usb speed....you set it a 115kb all examples and the arduino code was at 9600 baud !

So this is working GREAT !!!!!:sign0060::sign0060::sign0060:

I will investigate your lib further more but this sound really great

Scantech · Apr 10, 2013

It seems to have few unwanted extra bytes slipping through. I am still investigating the matter. Anyone have any ideas how the ffffff is slipping by?? look at the log below. The Engine controller shows 0x2e = length byte which is 46 data bytes. it shows 52 with 6 bytes slipping in.

This is how I decode the incoming data to a viewable hex format

B4X:

Sub Astreams_NewData (Buffer() As Byte)
   Dim temp As String
      
   Dim y As Int
   For y = 0 To Buffer.Length -1
      temp = Buffer(y)
      temp = Bit.ToHexString(temp)
      If temp.Length = 1 Then temp = "0" & temp
      temp = temp.ToUpperCase
      Log("RECEIVE: " & temp)
      txtLog.Text = txtLog.Text & temp
   Next

End Sub

This is how I send the data

B4X:

Sub btnSend_Click
   txtLog.Text = txtLog.Text & Chr(10)
   'DataResult = ""

   Dim Data As String: Data = spnCommand.GetItem(spnCommand.SelectedIndex)
   Data = "12040016"
   Dim len As Int: len = Data.Length /2
   Log("LEN = " & len)
   Dim b(len) As Byte
   
   'GET THE DATA FROM SPINNER AND PARSE IT TO INT
   Dim x, y As Int
   y = 0
   Dim temp As String
   For x = 0 To Data.Length Step 2
      If x = Data.Length Then Exit
      temp = Data.SubString2(x, x+2)
      Log("TEMP: " & temp)
      b(y) = Bit.ParseInt(temp, 16)
      Log("PARSE: " & b(y))
      y = y + 1
   Next 
   
   
   Dim DataByte(1) As Byte
   For x = 0 To b.Length -1
      Log("SEND: " & b(x))
      DataByte(0) = b(x)
      astreams.Write(DataByte)
      tr.Sleep(5)
   Next
End Sub

Check the Log. ffffffa0 ??? should be A0 only and ffffff9f should be 9f only

B4X:

** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
Checking permission
Connected successfully!
LEN = 4
TEMP: 12
PARSE: 18
TEMP: 04
PARSE: 4
TEMP: 00
PARSE: 0
TEMP: 16
PARSE: 22
SEND: 18
SEND: 4
SEND: 0
SEND: 22
RECEIVE: 12
RECEIVE: 04
RECEIVE: 00
RECEIVE: 16
RECEIVE: 12
RECEIVE: 2e
RECEIVE: ffffffa0
RECEIVE: 31
RECEIVE: 34
RECEIVE: 33
RECEIVE: 37
RECEIVE: 38
RECEIVE: 30
RECEIVE: 34
RECEIVE: 31
RECEIVE: 31
RECEIVE: 30
RECEIVE: 31
RECEIVE: 38
RECEIVE: 30
RECEIVE: 32
RECEIVE: 31
RECEIVE: 32
RECEIVE: 37
RECEIVE: 39
RECEIVE: 38
RECEIVE: 30
RECEIVE: 30
RECEIVE: 30
RECEIVE: 30
RECEIVE: 31
RECEIVE: 31
RECEIVE: 35
RECEIVE: 38
RECEIVE: 35
RECEIVE: 32
RECEIVE: 38
RECEIVE: 35
RECEIVE: 30
RECEIVE: 30
RECEIVE: 39
RECEIVE: 38
RECEIVE: 32
RECEIVE: 37
RECEIVE: 34
RECEIVE: 33
RECEIVE: 39
RECEIVE: 34
RECEIVE: 39
RECEIVE: ffffff9f
LEN = 4
TEMP: 12
PARSE: 18
TEMP: 04
PARSE: 4
TEMP: 00
PARSE: 0
TEMP: 16
PARSE: 22
SEND: 18
SEND: 4
SEND: 0
SEND: 22
RECEIVE: 12
RECEIVE: 04
RECEIVE: 00
RECEIVE: 16
RECEIVE: 12
RECEIVE: 2e
RECEIVE: ffffffa0
RECEIVE: 31
RECEIVE: 34
RECEIVE: 33
RECEIVE: 37
RECEIVE: 38
RECEIVE: 30
RECEIVE: 34
RECEIVE: 31
RECEIVE: 31
RECEIVE: 30
RECEIVE: 31
RECEIVE: 38
RECEIVE: 30
RECEIVE: 32
RECEIVE: 31
RECEIVE: 32
RECEIVE: 37
RECEIVE: 39
RECEIVE: 38
RECEIVE: 30
RECEIVE: 30
RECEIVE: 30
RECEIVE: 30
RECEIVE: 31
RECEIVE: 31
RECEIVE: 35
RECEIVE: 38
RECEIVE: 35
RECEIVE: 32
RECEIVE: 38
RECEIVE: 35
RECEIVE: 30
RECEIVE: 30
RECEIVE: 39
RECEIVE: 38
RECEIVE: 32
RECEIVE: 37
RECEIVE: 34
RECEIVE: 33
RECEIVE: 39
RECEIVE: 34
RECEIVE: 39
RECEIVE: ffffff9f
LEN = 4
TEMP: 12
PARSE: 18
TEMP: 04
PARSE: 4
TEMP: 00
PARSE: 0
TEMP: 16
PARSE: 22
SEND: 18
SEND: 4
SEND: 0
SEND: 22
RECEIVE: 12
RECEIVE: 04
RECEIVE: 00
RECEIVE: 16
RECEIVE: 12
RECEIVE: 2e
RECEIVE: ffffffa0
RECEIVE: 31
RECEIVE: 34
RECEIVE: 33
RECEIVE: 37
RECEIVE: 38
RECEIVE: 30
RECEIVE: 34
RECEIVE: 31
RECEIVE: 31
RECEIVE: 30
RECEIVE: 31
RECEIVE: 38
RECEIVE: 30
RECEIVE: 32
RECEIVE: 31
RECEIVE: 32
RECEIVE: 37
RECEIVE: 39
RECEIVE: 38
RECEIVE: 30
RECEIVE: 30
RECEIVE: 30
RECEIVE: 30
RECEIVE: 31
RECEIVE: 31
RECEIVE: 35
RECEIVE: 38
RECEIVE: 35
RECEIVE: 32
RECEIVE: 38
RECEIVE: 35
RECEIVE: 30
RECEIVE: 30
RECEIVE: 39
RECEIVE: 38
RECEIVE: 32
RECEIVE: 37
RECEIVE: 34
RECEIVE: 33
RECEIVE: 39
RECEIVE: 34
RECEIVE: 39
RECEIVE: ffffff9f
LEN = 4
TEMP: 12
PARSE: 18
TEMP: 04
PARSE: 4
TEMP: 00
PARSE: 0
TEMP: 16
PARSE: 22
SEND: 18
SEND: 4
SEND: 0
SEND: 22
RECEIVE: 12
RECEIVE: 04
RECEIVE: 00
RECEIVE: 16
RECEIVE: 12
RECEIVE: 2e
RECEIVE: ffffffa0
RECEIVE: 31
RECEIVE: 34
RECEIVE: 33
RECEIVE: 37
RECEIVE: 38
RECEIVE: 30
RECEIVE: 34
RECEIVE: 31
RECEIVE: 31
RECEIVE: 30
RECEIVE: 31
RECEIVE: 38
RECEIVE: 30
RECEIVE: 32
RECEIVE: 31
RECEIVE: 32
RECEIVE: 37
RECEIVE: 39
RECEIVE: 38
RECEIVE: 30
RECEIVE: 30
RECEIVE: 30
RECEIVE: 30
RECEIVE: 31
RECEIVE: 31
RECEIVE: 35
RECEIVE: 38
RECEIVE: 35
RECEIVE: 32
RECEIVE: 38
RECEIVE: 35
RECEIVE: 30
RECEIVE: 30
RECEIVE: 39
RECEIVE: 38
RECEIVE: 32
RECEIVE: 37
RECEIVE: 34
RECEIVE: 33
RECEIVE: 39
RECEIVE: 34
RECEIVE: 39
RECEIVE: ffffff9f
LEN = 4
TEMP: 12
PARSE: 18
TEMP: 04
PARSE: 4
TEMP: 00
PARSE: 0
TEMP: 16
PARSE: 22
SEND: 18
SEND: 4
SEND: 0
SEND: 22
RECEIVE: 12
RECEIVE: 04
RECEIVE: 00
RECEIVE: 16
RECEIVE: 12
RECEIVE: 2e
RECEIVE: ffffffa0
RECEIVE: 31
RECEIVE: 34
RECEIVE: 33
RECEIVE: 37
RECEIVE: 38
RECEIVE: 30
RECEIVE: 34
RECEIVE: 31
RECEIVE: 31
RECEIVE: 30
RECEIVE: 31
RECEIVE: 38
RECEIVE: 30
RECEIVE: 32
RECEIVE: 31
RECEIVE: 32
RECEIVE: 37
RECEIVE: 39
RECEIVE: 38
RECEIVE: 30
RECEIVE: 30
RECEIVE: 30
RECEIVE: 30
RECEIVE: 31
RECEIVE: 31
RECEIVE: 35
RECEIVE: 38
RECEIVE: 35
RECEIVE: 32
RECEIVE: 38
RECEIVE: 35
RECEIVE: 30
RECEIVE: 30
RECEIVE: 39
RECEIVE: 38
RECEIVE: 32
RECEIVE: 37
RECEIVE: 34
RECEIVE: 33
RECEIVE: 39
RECEIVE: 34
RECEIVE: 39
RECEIVE: ffffff9f
Error: (IOException) java.io.IOException: Expected at least 2 bytes
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = true **
Connected to B4A-Bridge (Wifi)
sending message to waiting queue (CallSubDelayed - UpdateStatus)
Ignoring event (too many queued events: CallSubDelayed - UpdateStatus)

Update: I believe it is parse error and have something to do with byte. Above 0x80 is reported as negative value in java if I am correct

agraham · Apr 11, 2013

Scantech said:
. Above 0x80 is reported as negative value in java if I am correct

Yes. Bytes are regarded as signed in Java so get sign extended when cast to a wider type like Int. You can mask the result with Bit.And. Try

B4X:

 b(y) = Bit.ParseInt(Bit.And(temp, 255), 16)

agraham · Apr 11, 2013

Version 2.2 now posted adds the SetCustomDevice method.

There are four individual USB drivers in the library and it recognises which driver to use for a device by looking in a list of VendorID and ProductID pairs. This list is part of the source code and so is compiled into the library. However it is possible that a device might be known to be compatible with one of the drivers but will not be recognised as it is not in the list. This is especially likely for ADC ACM (Communications Device Class Abstract Control Model) devices which implement a vendor-independent publicly documented protocol. Some Arduino and Roboclaw devices implement this protocol and are known to the library but other devices that might also implement ADC ACM will not be recognised even though they may be compatible.

SetCustomDevice allows you to specify which driver a device unknown to the library might support and its VendorID and ProductID so allowing the device to be recognised by the library. Note that this does not guarantee that the device will work correctly as it must exactly implement what the specified driver expects.

michw · Apr 12, 2013

USB to AVR UART

hi guys!
Is the library USBSerial2.2 and cable PL2303 will allow me to connect to the AVR microcontroller UART?
I have a tablet GO CLEVER TAB A73 Android 4.0.4 and after installation of the program from this post on and connected PL2303 get the message "No USB device or accessory detected."
Do I need ROOT on my tablet?
I need a solution that will allow you to transfer data between the tablet and the AVR.
Please help!

greetings!
Michal

Quaki · Apr 13, 2013

michw to determine is your goclever capable of working with this library go to the google market and install "usb host diagnostics".
If it will show you that the otg host works fine and your golcvere dont recognize the serial chip then you will probably have to try the solution mentioned in here
http://www.b4x.com/forum/additional...03-usb-rs232-adaptor-driver-5.html#post120979
everything depends on your ROM and the configuration of your Goclever
I have done this on my GC A93 and it work with FT232 but

I have got problem with this library it snends data to AVR it recives data from AVR but the recived data are choped and the worst thing is that they are choped randomly, usualy there are two parts with difrent part of the sended string, some times the string is sended as a full mesage.
I have tried everything from althering the usbtime (cannot set lower then 30ms), to change the method of sending from avr (I use the hardware UART) but the results are the same. In the BT_serial library it looked the same way until, I canged the async to the ordinary serial method without async. Now it work fine under the BT so I presume the the problem is between AVR and the async method.
Best regards

agraham · Apr 13, 2013

@michw Check this post http://www.b4x.com/forum/additional...03-usb-rs232-adaptor-driver-5.html#post121125

agraham · Apr 13, 2013

@Quaki This is not a problem, it is expected behaviour on many networks. You will have to reassemble your messages yourself or use AsyncStreams if you have control over both ends of the link. Read this thread http://www.b4x.com/forum/basic4andr...47-bluetooth-astreams-problem.html#post162540

Erel · Apr 13, 2013

If you are working with text then you should check AsyncStreamsText class:
[class] AsyncStreamsText - Useful when working with streams of text

Scantech · Apr 13, 2013

What is minimum API for this library?

I wanted to see what happens if I start usb with older api (OS 2.3.6).

Is there any way to trap the error and prevent the app from force close everytime you click open on older device?

B4X:

java.lang.NoSuchMethodError: android.hardware.usb.UsbManager.getDeviceList
   at anywheresoftware.b4a.objects.UsbSerial.UsbPresent(UsbSerial.java:341)
   at scantech.bmcom.main._btnopen_click(main.java:521)
   at java.lang.reflect.Method.invokeNative(Native Method)
   at java.lang.reflect.Method.invoke(Method.java:507)
   at anywheresoftware.b4a.BA.raiseEvent2(BA.java:167)
   at anywheresoftware.b4a.BA.raiseEvent2(BA.java:155)
   at anywheresoftware.b4a.BA.raiseEvent(BA.java:151)
   at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:59)
   at android.view.View.performClick(View.java:2538)
   at android.view.View$PerformClick.run(View.java:9152)
   at android.os.Handler.handleCallback(Handler.java:587)
   at android.os.Handler.dispatchMessage(Handler.java:92)
   at android.os.Looper.loop(Looper.java:130)
   at android.app.ActivityThread.main(ActivityThread.java:3691)
   at java.lang.reflect.Method.invokeNative(Native Method)
   at java.lang.reflect.Method.invoke(Method.java:507)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
   at dalvik.system.NativeStart.main(Native Method)

B4A Library UsbSerial library 2.0 - supports more devices

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