Hardware Block Diagram
I've done several searches on the wiki and I can't seem to find any block diagram of the Freerunner hardware. Is there any such thing? It would sure help to clarify how all this stuff is connected. -- Forwarded message -- From: Andy Green [EMAIL PROTECTED] Date: Thu, 05 Jun 2008 09:29:36 +0100 Subject: Re: Yummy new CPU/GPU combo ... We would rightly deserve to get our asses laughed at if we did that. You're likely thinking about the actual SD Card interface is now via the Glamo, which has an SD interface poking out of it. WIFI is hooked to the CPU SDIO bus and we don't otherwise use these buses. | If it's connected to the address/data bus, why is it so slow and why can't | DMA be used to copy data to it? DMA can be used, I seem to recall someone saying they did something with it in Xglamo, but PIO isn't where the problems are coming from. The Glamo offers normal async memory bus interface which we use, but it has a bunch of timing constraints. (There is a synchronous burst bus mode that we don't use because the CPU doesn't support it and adding a CPLD in there to translate will eat power and doesn't make sense.) ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Hardware Block Diagram
may be you're looking for something like this: http://wiki.openmoko.org/wiki/Image:SimpleComponentDiagram.jpg well it's quite simplified, but i just found that on the wiki.. On 6/5/08, Dale Schumacher [EMAIL PROTECTED] wrote: I've done several searches on the wiki and I can't seem to find any block diagram of the Freerunner hardware. Is there any such thing? It would sure help to clarify how all this stuff is connected. -- Forwarded message -- From: Andy Green [EMAIL PROTECTED] Date: Thu, 05 Jun 2008 09:29:36 +0100 Subject: Re: Yummy new CPU/GPU combo ... We would rightly deserve to get our asses laughed at if we did that. You're likely thinking about the actual SD Card interface is now via the Glamo, which has an SD interface poking out of it. WIFI is hooked to the CPU SDIO bus and we don't otherwise use these buses. | If it's connected to the address/data bus, why is it so slow and why can't | DMA be used to copy data to it? DMA can be used, I seem to recall someone saying they did something with it in Xglamo, but PIO isn't where the problems are coming from. The Glamo offers normal async memory bus interface which we use, but it has a bunch of timing constraints. (There is a synchronous burst bus mode that we don't use because the CPU doesn't support it and adding a CPLD in there to translate will eat power and doesn't make sense.) ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Hardware Block Diagram
Here is the detail spec of GTA02 http://wiki.openmoko.org/wiki/Neo_FreeRunner_GTA02_Hardware Dale Schumacher 提到: I've done several searches on the wiki and I can't seem to find any block diagram of the Freerunner hardware. Is there any such thing? It would sure help to clarify how all this stuff is connected. -- Forwarded message -- From: Andy Green [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] Date: Thu, 05 Jun 2008 09:29:36 +0100 Subject: Re: Yummy new CPU/GPU combo ... We would rightly deserve to get our asses laughed at if we did that. You're likely thinking about the actual SD Card interface is now via the Glamo, which has an SD interface poking out of it. WIFI is hooked to the CPU SDIO bus and we don't otherwise use these buses. | If it's connected to the address/data bus, why is it so slow and why can't | DMA be used to copy data to it? DMA can be used, I seem to recall someone saying they did something with it in Xglamo, but PIO isn't where the problems are coming from. The Glamo offers normal async memory bus interface which we use, but it has a bunch of timing constraints. (There is a synchronous burst bus mode that we don't use because the CPU doesn't support it and adding a CPLD in there to translate will eat power and doesn't make sense.) ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
