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<simon> |
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This file written by Hans Berglund, who developed the pcf driver included |
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in this directory. |
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</simon> |
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BACKGROUND |
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========== |
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This is an update to Simons i2c driver, based on his 19990214 version. |
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I do care about the PCF8584 part only, that means the following files: |
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algo_pcf.c - PCF8584 algorithm, no HW access here. |
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algo_pcf.h - Header file for the PCF algorithm. |
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pcf_isa.c - The Elektor ISA I2C board interface. The |
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I/O address, interrupt etc. is defined here. |
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pcf_isa.h - Header file for HW definitions |
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pcf8584.h - PCF8584 registers and bits. |
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I have always got plenty of warnings when compiling the i2c driver. The |
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warnings come from the C preprocessor complaining about '-' in variable |
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names. My suggestion is to avoid '-' and use '_' instead. |
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VERSIONS |
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======== |
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20000109 (Frodo Looijaard, frodol@dds.nl) |
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----------------------------------------- |
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- Hopefully fixed the horribly broken pcf_xfer function |
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- Added I2C_M_NOSTART and I2C_M_REV_DIR_ADDR support |
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19990218 |
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-------- |
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- Changed default clock setting to 0x1c |
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- Changes in pcf_isa.c to make interrupt work |
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- Added changes from Simons 19990214 version |
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19990202 (Changes from Simons 19990118) |
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--------------------------------------- |
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- Added algo_pcf.c |
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- Added algo_pcf.h |
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- Added pcf_isa.c |
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- Added pcf_isa.h |
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- Moved pcf8584.h from "old-code", and did minor changes. |
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- Changed detect/detect.c to give nicer output. |
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- Use i2c_debug in i2c-dev.c |
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LOCATIONS |
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========= |
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This driver: http://home.telia.no/hansb/I2C_page.htm |
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Additions to Simons driver to make it work with PCF8584. |
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Interrupthandling added. Some testing performed, but still |
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experimental version. |
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Simons driver: http://www.tk.uni-linz.ac.at/~simon/private/i2c/v4l/ |
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The baseline for further development. |
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Pybes driver: http://www.iae.nl/users/pybe/linux/index.htm |
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More advanced PCF8584 additions. Supports message passing on |
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module level |
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