于 2013年04月23日 05:22, Brian Norris 写道:
You never sent a command to the chip. How can you expect to read from it?
It seems that you are writing this function with the assumption of a
particular calling context (a context in which the last command was
CMD_PARAM). IMO, it would make a lot more sense that this function
actually send its own CMD_PARAM followed by either X bytes of skipped
read_buf() or a change read column command. Then it doesn't need the
"last" argument, and its usage makes much more sense.
I finally find why i can not use the CHANGE READ COLUMN command:
When we detect the ONFI nand, we actually use the nand_command() to
issue the command which
does not works with CHANGE READ COLUMN command.
I use the nand_command_lp() to issue the CHANGE READ COLUMN command, it
works fine.
I can remove the "last" argument now.
thanks Brian.
Huang Shijie
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