Using the 547X as a PCI device - not controller

droidian — Thu, 01 Feb 2007 22:32:52 GMT

I have a functional 5474 design, running an RTOS, that communicates with a host computer using LAN, USB, or Serial. I have been asked convert this board into a conventional 32-bit, 33Mhz, PCI plug-in card. Because I knew I might be asked to do this, I used a multiplexed add/data bus and kept the PCI pins open. The card will NOT be the host or system controller. Initially, it will reside in a Windows box followed by support for Linux.

I am looking for guidance, warnings, drivers/code... basically help of any kind connecting the 5474 to the PCI bus and communicating with the system host.

I envision a simple protocol for communicating with the system controller. For example, the controller sends data (a few kbytes max, normally < 128 bytes) across the PCI bus which gets stuffed into the cards memory/fifo/? and then interrupts the Coldfire somehow to process the data. The Coldfire reads the data, does something, and replies by sending some data (normally < 128 bytes, could be 1Mbyte) across the PCI bus using a similar "write and interrupt" mechanism.

Any help would be greatly appreciated. My PCI knowledge is pretty basic. I know the host discovers the PCI devices, devices requests memory/io space, the host tells the device where to go (in memory that is ), and then the device is considered "configured". I have used the AMCC 5933 PCI MatchMaker in a previous 68k design so I familiar with the fifo/doorbell mechanism for a PCI device to communicate with a PCI host/master.

Re: Using the 547X as a PCI device - not controller

C_G_B_Spender — Tue, 19 Jun 2007 23:07:01 GMT

Has anyone ever done this before? That is has anyone ever used the 5475's PCI controller to create 5475 based PCI card?

The MBAR1 window being soo large (1 GB) does seem to be a limiting factor, but perhaps this would work in a 64-bit system?

ColdFire/68K Microcontrollers and ProcessorsのトピックRe: Using the 547X as a PCI device - not controller

Using the 547X as a PCI device - not controller

Re: Using the 547X as a PCI device - not controller