From: JamesAng <ang...@gm...> - 2011-10-24 04:34:20
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Hi Philip, Philip Balister wrote: > > On 10/02/2011 10:16 PM, JamesAng wrote: >> >> Hi Philip, >> >> >> Philip Balister wrote: >>> >>> On 09/28/2011 03:14 AM, JamesAng wrote: >>>> >>>> Hi all, >>>> >>>> I know there are past discussions on the use of GPMC with FPGA but the >>>> Nabble's search-engine is getting erratic results. >>>> >>>> Does anyone have a simple tutorial or documented guide on the use of a >>>> simple GPMC driver& user-land application to communicate (read/write) >>>> to >>>> FPGA using Overo? i.e. assuming the FPGA is another memory-storage like >>>> the >>>> NAND. >>>> >>>> I want to know if the GPMC resource can be shared for both Ethernet/LAN >>>> and >>>> other devices. >>> >>> Yes, it shares fine. >>> >>> This is probably more complex than you want :) >>> >>> https://github.com/balister/linux-omap-philip/commits/e100-2.6.38-2 >>> >>> Philip >>> >> >> Thanks in adv for pointing me to your share on the topic. >> >> Do you have some guides/wiki/documentations for newbies like me to start >> reading from on using the GPMC with simple read/write to FPGA? >> > > No :) > >> In that git repo, where should I start looking at to understand the >> relevant >> parts of the code used? > > > arch/arm/mach-omap2/board-overo.c has the gpmc configuration code. > drivers/misc/usrp_e.c has the actual driver code. > I'm reading the files and would if you have some documentation such as the timing diagram, the data-flow, diagrams etc that I can use to x-reference to the codes to understand it in detail? Is there a user-land test application that is using the driver? Many thanks in adv. James. -- View this message in context: http://old.nabble.com/Sharing-the-GPMC-Bus-with-other-devices.-e.g.-FPGA-tp32548305p32708003.html Sent from the Gumstix mailing list archive at Nabble.com. |