Re: [oc] Get OCIDEC working

[Marcos Lois Bermúdez <marcos.lois@securez.org>]

Well, my bus system are only 16bit , i see that i need to make a warper for 
the ocidec register taht are all of 32bit, the ATA register are all of 16Bit.

I'm very newbye, but i read a bit more of vhdl, and try to make the warper.

Thks a lot.
At 14:52 14/10/2002 +0200, you wrote:

>Hi Marcos,
>
>Depends on what you mean by your system is 16bit.
>The IDE interface is 16bit. Whereas the OCIDEC uses 32bit registers.
>When you access the IDE drive through the 32bit host interface, only the 
>lower
>16bits are valid. The upper 16bits are garbage.
>So the 16bit IDE interface is mapped to the 16bit LSBs of the 32bit host
>interface.
>
>
>However if your host interface is only 16bits, then you need to write a
>wrapper so you can access the 32bit registers using a 16bit databus.
>
>Richard
>
>
>
> > Hello i'm a newbye in vhdl programming.
> >
> > I'm making a proyect that have a fpga chip, this proyect is the dragonix
> > board ( http://www.openhardware.net/Dragonix ), in the FPGA implement a I2C
> > core and a SPI core to control some devices on the board, i want to
> > implement the OCIDEC-1 to drive the IDE bus that are connected to the FPGA,
> > my problem is that the bus system are 16Bit width, and the OCIDEC-1 have
> > 32bit registers, how i can adapt it to work under my design,i very
> > confused.
> >
> > Any help will be apeciated.
> >
> > Regards.

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