On 2010/07/19 1:50 PM, Stefan Roese wrote: >> This is quite odd, though. >> >> DNS323B1> mw.w 0xff800555 00aa >> >> .. never returns. It seems to hang up the board for some reason. > > Ahh, unaligned 16bit access on ARM. > > Please give these commands another try: > > => mw.w ff800aaa 00aa > => mw.w ff800554 0055 > => mw.w ff800aaa 0090 > => md.w ff800000 > > > Cheers, > Stefan
DNS323B1> mw.w ff800aaa 00aa DNS323B1> mw.w ff800554 0055 DNS323B1> mw.w ff800aaa 0090 DNS323B1> md.w ff800000 ff800000: 0000 0000 0000 0000 0000 0000 0000 0000 ................ ff800010: 0000 0000 0000 0000 0000 0000 0000 0000 ................ ff800020: 0000 0000 0000 0000 0000 0000 0000 0000 ................ ff800030: 0000 0000 0000 0000 0000 0000 0000 0000 ................ ff800040: 0000 0000 0000 0000 0000 0000 0000 0000 ................ ff800050: 0000 0000 0000 0000 0000 0000 0000 0000 ................ ff800060: 0000 0000 0000 0000 0000 0000 0000 0000 ................ ff800070: 0000 0000 0000 0000 0000 0000 0000 0000 ................ I also tried various permutations of mw.w ff8000aa 00aa, etc, as well as mw.w 0xff800554 5500 (rather than 0055), since we are writing to a different address, and none of them gave anything other than 0000 results. This is the procedure for entering QRY mode, though, from my original email: > For this particular chip, the command is: > > mw.w 0xff8000aa 9800 (rather than 9898) > > (FWIW mw.b 0xff8000aa 98 also works fine to enter QRY mode) > > Having done that, the QRY results are present at 0xff800020: > > md.b ff800020 20 > ff800020: 51 51 52 52 59 59 02 02 00 00 40 40 00 00 00 00 QQRRYY....@@.... > ff800030: 00 00 00 00 00 00 27 27 36 36 00 00 00 00 04 04 ......''66...... Does that help? Rogan _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
