Hello
Have a look at my CDC USB Stack which is based on the Nuts&Volts article
about USB HID stack using sdcc. Its somewhere down on this page
http://pic-o-rama.org/index.php?option=com_content&view=article&id=2:simple-usb-board&catid=1:evaluation-boards&Itemid=3
Best Regards,
Jan
Am 09.02.2010 08:46, schrieb Vaclav Peroutka:
> Hi Kusti,
>
> I changed Alexander Enzmann's stack to support CDC. I am still planning to
> put it somewhere on the web (maybe some SVN).
>
> Anyway, here is the initial version which worked for me during tests.
>
> Vaclav
>
>> ------------ Původní zpráva ------------
>> Od: Kustaa Nyholm <kustaa.nyh...@.....>
>> Předmět: [Sdcc-user] PIC (18F) code generation tips...
>> Datum: 08.2.2010 21:07:50
>> ----------------------------------------
>> Hi,
>>
>> I'm converting a USB CDC sample that I found in the net to run on my
>> 18F4550.
>>
>> At preset the code is too big to fit into my memory, so I need to squeeze it
>> a bit. On inspecting the source code and generated code I noticed
>> quite a bit of code gets emitter because of the use of generic pointers.
>>
>> For example there is:
>>
>> static unsigned char *out_ptr; // Data to send to the host
>> static unsigned char *in_ptr; // Data from the host
>>
>> which gets used like:
>>
>> for (i=0;i<bufferSize;i++)
>> {
>> *in_ptr++ = *out_ptr++;
>> }
>>
>>
>> and like:
>>
>> code config_struct config_descriptor = {
>>
>> <snip>
>>
>> out_ptr = (unsigned char *)&config_descriptor;
>> count = *(out_ptr + 2);
>>
>> So the data pointed to is sometimes in ROM/code (the USB descriptors)
>> and some times in RAM.
>>
>> Quite a lot of code and some library calls gets emitted for all this.
>>
>> What would be my best strategy to rework this?
>>
>> br Kusti
>>
>>
>>
>> ------------------------------------------------------------------------------
>> The Planet: dedicated and managed hosting, cloud storage, colocation
>> Stay online with enterprise data centers and the best network in the business
>> Choose flexible plans and management services without long-term contracts
>> Personal 24x7 support from experience hosting pros just a phone call away.
>> http://p.sf.net/sfu/theplanet-com
>>
>>
>> _______________________________________________
>> Sdcc-user mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/sdcc-user
------------------------------------------------------------------------------
SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
http://p.sf.net/sfu/solaris-dev2dev
_______________________________________________
Sdcc-user mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/sdcc-user
