yaojin liu wrote: > hi: > dm9000a works as 16bit bus width. however, i have not seen any init code for > the dm355's chipselect. > and by default ,the cs1 is 8bit bus width at reset. how doew it work?
I think the setup is done by the UBL provided by TI. U-boot is a 3-rd stage bootloader for DM355. The RBL (Rom Bootloader) loads the UBL from storage, that sets up the required peripherals (RAM / AEMIF), and then loads u-boot. u-boot does not set the a2cr register in the AEMIF interface, but the UBL has already configured it for 16-bit access. Best regards, Stefano Babic -- ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: off...@denx.de ===================================================================== _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
