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Timestamp:
01/09/00 17:00:48 (9 years ago)
Author:
frodo
Message:

Petr's patches and more

* Removed compile warning about /* use
* Added I2C_M_NOSTART and I2C_M_REV_DIR_ADDR flags
* Added I2C_FUNC_PROTOCOL_MANGLING flag corresponding to both flags above
* Added support for these flags for bit and pcf algorithms
* Documented the flags within doc/i2c-protocol

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  • i2c/trunk/doc/i2c-protocol

    r3384 r3428  
    4545 
    4646  S Addr Rd [A] [Data] NA S Addr Wr [A] Data [A] P 
     47 
     48 
     49Modified transactions 
     50===================== 
     51 
     52We have found some I2C devices that needs the following modifications: 
     53 
     54  Flag I2C_M_NOSTART:  
     55    In a combined transaction, no 'S Addr' is generated at some point. 
     56    For example, setting I2C_M_NOSTART on the second partial message 
     57    generateds something like: 
     58      S Addr Rd [A] [Data] NA Wr [A] Data [A] P 
     59    If you set the I2C_M_NOSTART variable for the first partial message, 
     60    we do not generate Addr, but we do generate the startbit S. This will 
     61    probably confuse all other clients on your bus, so don't try this. 
     62 
     63  Flags I2C_M_REV_DIR_ADDR 
     64    This toggles the Rd/Wr flag. That is, if you want to do a write, but 
     65    need to emit an Rd instead of a Wr, or vice versa, you set this 
     66    flag. For example: 
     67      S Addr Rd [A] Data [A] Data [A] ... [A] Data [A] P 
     68