From: "Vishwanath" <vishwanath@mistralsoftware.com>
To: <linuxppc-embedded@lists.linuxppc.org>
Subject: I2C Device Register Read problem in 440GP
Date: Thu, 21 Nov 2002 19:08:13 +0530 [thread overview]
Message-ID: <001201c29163$3d2e9cd0$faffa8c0@VISHWANATH> (raw)
Hi all,
I have written custom driver for accessing a device sitting on the I2C bus
of IBM 440GP. I am operating in the master mode of I2C controller of 440GP.
I was able to write a particular value onto the device register. But when I
try to read the value back, it is returning 0. I have disabled the
interrupts.
When I was debugging, I found that data was arriving on the I2C bus. But
before I could read the Master Data Buffer Register of 440 GP, the register
is getting cleared. Does anyone no why?
Pls help me. I am stuck.
Thanks and regards,
vishwa
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reply other threads:[~2002-11-21 13:38 UTC|newest]
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