B4J Question Reading a file to list

[saunwin]

Good morning,

I have a HEX file that I've chosen with file chooser and read into a list.

Dim List1 As List
    List1.Initialize
        List1 = File.ReadList(File.GetFileParent(filename), File.GetName(filename))
            For i = 0 To List1.Size - 1
            Log(List1.Get(i))
            Next

Next step is to transmit this list/hex file to a microcontroller (over an opened com port). How would I do this ?
Hints, tips, advice, gratefully received - Many thanks in advance

 

[stevel05]

Have you seen this? https://www.b4x.com/android/forum/threads/jserial-library.34762/

 

[saunwin]

Hi Steve, Yes I have comms between the PC and the micro, it's getting the list into a byte array suitable from transmission (I think) I'm struggling with.

 

[stevel05]

Then you should probably use the jRandomAccessFile Library and it's Read as bytes Method.

 

[Erel]

You can read a file to an array of bytes with:

Dim bytes() As Byte = Bit.InputStreamToBytes(File.OpenInput(...)) 'InputStreamToBytes closes the stream

 

[saunwin]

Hi Erel,
Thanks for the advice. I seem to be missing some bytes.
The code is below and the log will log b.length correctly as 36133
the loop will only log 603 values ?

Any idea what's happening here.
Many thanks in advance.

Dim b() As Byte = Bit.InputStreamToBytes(File.OpenInput(File.GetFileParent(filename), File.GetName(filename)))
   Log (b.Length)
        For x =0 To b.Length
            Log (x &" - " & b(x))
    Next

 

[Erel]

Don't you see an error with this code?

It should be b.Length - 1.

 

[DonManfred]

Don't you see an error with this code?

It should be b.Length - 1.

Then it ill be one byte less

But 36133 (b.length) - 603 (log output in lines) = 35530 missing bytes.

Or did i miss something? ;-)

 

[saunwin]

Don't you see an error with this code?

It should be b.Length - 1.

No Error's Erel, The sub just completes after 603 loops (it doesn't reach the end of the array, so wouldn't throw the error)

 

[Erel]

Please upload a small project with this file and code.

 

[saunwin]

Hi Erel,

I Think I've done this correctly.

 

[Erel]

It is an IDE issue. The logger becomes overflown and then dismisses the items. It will be fixed in v4.20 (non-beta).

The data is there. It will also show if you put a breakpoint in this sub.