AN #197 - Additional PC Multimedia USB-keyboard/Bascom 2.0.7

i.dobson

Hi,

I'm currently playing with a quick and dirty USB mini Keyboard using the code from AN #197.

When I compile the code under 2.0.7.7 I get a large number of errors/warnings

albertsm · Joined: 09 Apr 2004 Posts: 4975 Location: Holland

it is not a good idea to use arrays like shown in the AN. When passing an array, use array(). As you can see the compiler checks if you reference an array, if an array was passed.
ignoring the error is not a good idea in this case. you can add $notypecheck to the code. In that case, the compiler ignores these kind of errors. I would recommend to update the code. But as a quick 'fix' adding $notypecheck will do the trick as well.

i.dobson · Posted: Thu Mar 27, 2014 9:57 pm Post subject:

Hi,

Thanks for the answer, I'll try patching the code when I get the time/when I know the Hardware is working. until then I'll just use $notypecheck.

Regards
Ian Dobson

i.dobson · Posted: Fri Mar 28, 2014 7:34 pm Post subject:

Hi,

OK, I've banged up a simple board and unfortunatly it's not working very well. When I plug the board into an USB port a new device is seen but it's almost always "unknown". I've checked the board/fuse Settings and all the usual things and evyrthing Looks OK. The only thing I can see is that the voltage on D+ and D- is only about 2.2-2.4Volt. I would expect it to be about 3.6Volt (Over the zener diode). I'm using BZV85C3V6 zener diodes (http://www.datasheets360.com/pdf/5667260554674975242).

I have a feeling the zeners I'm using are incorrect but I can't understand why. I used these zeners as that's what I found first in my "junk box".
The board layout is the same as the AN.

Regards
Ian Dobson

Petr_ · Joined: 24 Mar 2010 Posts: 66

Fixed code and it compiles without errors in version 2.0.7.7.

But there is little strange behavior of the compiler in this piece of code (file Descriptors.inc, lines 288 and 289).

albertsm · Joined: 09 Apr 2004 Posts: 4975 Location: Holland

thanks for the update.
the error you get is because passed arrays do not pass their length and the bit range error check reports an error. i changed it.

i.dobson · Posted: Sat Mar 29, 2014 9:29 am Post subject:

Hi Petr_,

Thanks for the code. I'll try it out once I've found more sutable zener diodes.

Regards
Ian Dobson

i.dobson · Posted: Sat Mar 29, 2014 4:12 pm Post subject:

Hi,

OK I've loaded the code from petr_ and it's working Smile

Thankyou Petr_

As I couldn't find any zener diodes with 3.6Volt I went back to the original AN and used 2 diodes is series to produce 3.6Volt.

Regards
Ian Dobson

cicos · Joined: 14 Mar 2015 Posts: 1

Hi,
Does anyone have an explanation Why the compiler reports errors:

Error : 261 Line: 140 Array expected [_USB_TX_STATUS] , in File; C:\USB_Key-Petr_\Multimedia keyboard.bas
Error : 261 Line: 149 Array expected [_USB_TX_STATUS] , in File; C:\USB_Key-Petr_\Multimedia keyboard.bas
Error : 7 Line: 149 IF THEN expected [474] , in File; C:\USB_Key-Petr_\Multimedia keyboard.bas
Error : 123 Line: 149 END IF expected [474] , in File; C:\USB_Key-Petr_\Multimedia keyboard.bas

I tried to compile the source who sent Petr_ and on this occasion we report mentioned error.
I only 6 buttons and the ability to activate an LED so I wanted to slightly modify the program.
I hope you do not mind because the topic of restarting after a year.

I hope that you have the patience to answer.
I apologize to my bad English - Google translator
Regards
Miroslav