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8devices Community - View topic - "True" I2C driver
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View unanswered posts | View active topics It is currently 28 Apr 2024, 06:55



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 "True" I2C driver 
Author Message

Joined: 26 Dec 2012, 16:31
Posts: 50
Hi!

Please find attached the first draft of a "true" I2C driver that uses the I2C controller. The advantage of this driver over the already existing one is that it i.e. takes only 8% CPU whereas the bit-banging I2C driver takes 31% for the same application (reading gyro and accelerometer data at 100 Hz).

Please check the included README.txt file for compilation instructions and how to use the driver.

regards

Bernhard


Attachments:
i2c-ramips-20130122-1.tgz [16.07 KiB]
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22 Jan 2013, 19:55
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Joined: 04 Oct 2012, 11:57
Posts: 21
Hi Bernhard,

thank you very much for your work on this driver!

One question regarding the old bit-banging I2C driver mentioned in your README:
Would it be possible to change the pio pins the old driver uses to get two independent i2c ports? If yes - where is the right place to configure them?

Regards
Michael


22 Jan 2013, 21:34
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Joined: 26 Dec 2012, 16:31
Posts: 50


23 Jan 2013, 00:32
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Joined: 26 Dec 2012, 16:31
Posts: 50


23 Jan 2013, 00:57
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Joined: 04 Oct 2012, 11:57
Posts: 21
Hi Bernhard,

thanks a lot for your help on that!

Michael


23 Jan 2013, 11:29
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Joined: 07 Dec 2011, 16:01
Posts: 525
Location: Lithuania
Need to put this to WIKI


23 Jan 2013, 11:39
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Joined: 04 Oct 2012, 11:57
Posts: 21
Hi Bernhard,

do you mean in mach-carambola.c ?
I can't find this struct in spi-ramips.c: static struct i2c_gpio_platform_data carambola_i2c_gpio_data

Regards
Michael


23 Jan 2013, 11:41
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Joined: 18 Mar 2012, 19:06
Posts: 52


23 Jan 2013, 13:12
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Joined: 26 Dec 2012, 16:31
Posts: 50


23 Jan 2013, 14:30
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Joined: 26 Dec 2012, 16:31
Posts: 50


Attachments:
i2c-ramips-20130122-2.tgz [16.31 KiB]
Downloaded 334 times
23 Jan 2013, 15:34
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