[Mono-list] Invalid data from CP2102 USB device

[Steve Ricketts]

This was actually posted by leblanc but I copied it here because the thread
was moved.

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> to be consistent, same data every time the same key is pressed, but not
> the

It is because your losing the sign bit. (all except 213/184 )  Make sure
your saving to unsigned byte


// 1 - 186 90
10111010
01011010


// 2 - 133 5
10000101
00000101


//3 - 213 184
11010101
10111000


//4 - 128 0
10000000
00000000


//5 - 130 2
10000010
00000010

//7 - 145 17
10010001
00010001




On Mon, 12 Apr 2010 04:27:51 -0800 (PST), Steve Ricketts
<[hidden email]> wrote:
>
> I used BackgroundWorker to set up a thread to continually look at
> BytesToRead
> and grab the data.  It does that ok, but the data is not correct.  It
> seems
> to be consistent, same data every time the same key is pressed, but not
> the
> correct values.  The USB device is an RF receiver that listens to
wireless

> remote controls.  When I press a button on the wireless remote, I get the
> proper packet size (8) but the values are off.  An example below with the
> results from the program in Windows:
>
> Linux      Windows (correct values)
> 0 - 255   255
> 1 - 186   90
> 2 - 133   5
> 3 - 213   184
> 4 - 128   0
> 5 - 130   2
> 6 - 128   0
> 7 - 145   17
>
> Using the same baud rate on Linux that I do with Windows (128000) I get
> nothing from the receiver.  Switching to 115200 I get the data but as I
> said, it's incorrect.  No other baud rate gives me any response at all.
>
> Has anyone had any similar issues or know what else I could try?
> --
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