I've been going round and round on this for a couple of days. I have a
logic analyzer (cheap USB, that is why come edges are not quite synced)
attached to the gpmc pins on a logicpd dev board. The read cycle timings
are what I expect.
The write cycle seems to do one cycle OK, then thing go into the weeds.
Here are the values I write into the registers:
GPMC_CONFIG1 reg: 1200
GPMC_CONFIG2 reg: 40400
GPMC_CONFIG3 reg: 20201
GPMC_CONFIG4 reg: 4030403
GPMC_CONFIG5 reg: 1040505
GPMC_CONFIG6 reg: 4030000
and here is a screen shot of the logic analyzer:
http://balister.dyndns.org:8008/~balister/gpmc-write.png
Philip
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