On Thu, Aug 13, 2009 at 9:29 AM, Elvis Dowson<elvis.dowson@xxxxxxx> wrote: > Hi John, > > On Aug 13, 2009, at 5:14 PM, John Sarman wrote: > >> >> >> <snip from omap 35xx page> >> General Purpose Memory Controller (GPMC) >> >> * 16-bit Wide Multiplexed Address/Data Bus >> * Up to 8 Chip Select Pins With 128M-Byte Address Space per Chip Select >> Pin >> * Glueless Interface to NOR Flash, NAND Flash (With ECC Hamming >> Code Calculation), SRAM and Pseudo-SRAM >> * Flexible Asynchronous Protocol Control for Interface to Custom >> Logic (FPGA, CPLD, ASICs, etc.) >> * Nonmultiplexed Address/Data Mode (Limited 2K-Byte Address Space) >> </snip from omap 35xx page> > > Thanks for the info, I've read that section on the GPMC. I'm going to > attempt this in stages. First I'll implement a simple protocol between the > OMAP and the FPGA, e.g. use GPIOs to signal read and write operations, and > the serial UART0 to transfer data to a memory location for the FPGA to > process and return the result. > > Since the TI OMAP uses 1.8v signalling, I can directly interface it with the > Virtex-5 and get a simple prototype up and running. > > After that, create a TI OMAP GPMC to PLB v4.6 Bus Bridge, to make the GPMC > requests appear in the FPGA PLB bus, so that it can access the FPGA devices > and peripherals connected to the PLB bus. I'm using the gumstix Overo for > these tests, and the GPMC signals are not available on the Palo43 or summit > expansion boards. It is available on the Overo J4/J6 connector though, but > that needs a custom board to bring those signals out. > > Do you know if any other TI OMAP 35xx development board exposes the GPMC > connectors? I just want to finish the software/firmware part before starting > work on a custom expansion board. I had to build a custom board for my project, I would recommend taking that approach if possible. > > Best regards, > > Elvis > > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
