Hello everyone, I'm following with interest the development of the SPI driver as beagleboard to FPGA interface.
In my case, the OMAP35xx on a Gumstix OVERO connects to a Maxim/Dallas MAX2769 (GPS front-end) through a "DSP interface". This is a 4-wire serial bus with 1) data, 2) clock (most likely at about 20MHz), 3) a 16 bit word-sync signal, 4) a 128 words frame-sync signal. and (maybe) you can find a short snapshot of the timing in attach. As far as I understood from the Omap TRM, the SPI won't do the job. I'm quite sure that I need the MCBSP to receive that protocol. >From a preliminary study, I think receiving 20Mbit/sec (2.5MByte/sec) is possible using DMA. I think the latest kernel image with a custom U-BOOT (to change the pin mux to expose the MCBSP3) should do. Does anyone have any idea to share on this topic? With regards, Michele
<<attachment: max2769-dsp-1bits.JPG>>
