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From: 向宇 <noname1.c@hotmail.com>
To: <linuxppc-dev@ozlabs.org>
Subject: Confusing of using SPIE register in MPC8377E
Date: Fri, 27 Feb 2009 22:41:12 +0800	[thread overview]
Message-ID: <BLU127-W16625432C3103A605192F9B5AA0@phx.gbl> (raw)

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I'm writing a spi driver for MPC8377E.

I use a GPIO as the chip select signal.

I'm tring to use the NE or NF bits to decide when to read or when the transmit is over.

But I found that I have just write the command,the NE is set.Also I found that the transmit is not over the GPIO has been pulled up.

 

So I don't know what the real meaning of these two bits.Or it just indicates that the register can be write but not the operation has been over.

 

Can anyone give me a help?

Or anyone who has ever written the spi driver can give a source code for reference.

 

Thank you!

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                 reply	other threads:[~2009-02-27 14:46 UTC|newest]

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