Le 15/02/2011 09:21, Ran a écrit : > Albert ARIBAUD<albert.aribaud<at> free.fr> writes: > >> >> Hi Ran, >> >> Le 15/02/2011 07:35, Ran Shalit a écrit : >>> Hello, >>> >>> I'm working on OMAPL138 EVM board, with the U-BOOT. >>> I'm trying to access and write into the register (which have write bits), >>> but I always read 0 in all the map space of the mcBSP0 and mcBSP1. >>> (0x01d10000 - 0x1d10800, 0x01d11000 - 0x1d11800). >>> I wonder what I missed here. any ideas are welcomed. >> >> Many SoCs have "base address registers" that allow remapping internal or >> peripheral registers anywhere in the address space, which means the >> actual address you're trying to get at might not be the right one. Did >> you check the BAR(s) and make sure the mcBsp address you're targetting >> is the right one for your board? >> >>> Thank you very much, >>> >>> Ran >> >> Amicalement, > > Hello Albert, > > Thank you very much for your reply. > I've checked the datasheet but I see no reference to base address registers > for the mcBSP. > > mcBSP: http://www.ti.com/litv/pdf/sprugj6c > OMAPL138: http://www.ti.com/lit/gpn/omap-l138
Evidently the mcBsp specs won't tell you how the device is mapped within a given SoC. As for the OMAPL138 SoC, it looks more like an overview. You would need to refer to a detailed spec, one with register level description of the module. > thanks again, > > Ran Amicalement, -- Albert. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
