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48 lines
1.5 KiB
48 lines
1.5 KiB
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Kernel driver i2c-taos-evm |
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========================== |
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Author: Jean Delvare <[email protected]> |
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This is a driver for the evaluation modules for TAOS I2C/SMBus chips. |
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The modules include an SMBus master with limited capabilities, which can |
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be controlled over the serial port. Virtually all evaluation modules |
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are supported, but a few lines of code need to be added for each new |
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module to instantiate the right I2C chip on the bus. Obviously, a driver |
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for the chip in question is also needed. |
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Currently supported devices are: |
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* TAOS TSL2550 EVM |
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For additional information on TAOS products, please see |
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http://www.taosinc.com/ |
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Using this driver |
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----------------- |
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In order to use this driver, you'll need the serport driver, and the |
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inputattach tool, which is part of the input-utils package. The following |
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commands will tell the kernel that you have a TAOS EVM on the first |
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serial port:: |
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# modprobe serport |
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# inputattach --taos-evm /dev/ttyS0 |
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Technical details |
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----------------- |
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Only 4 SMBus transaction types are supported by the TAOS evaluation |
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modules: |
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* Receive Byte |
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* Send Byte |
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* Read Byte |
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* Write Byte |
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The communication protocol is text-based and pretty simple. It is |
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described in a PDF document on the CD which comes with the evaluation |
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module. The communication is rather slow, because the serial port has |
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to operate at 1200 bps. However, I don't think this is a big concern in |
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practice, as these modules are meant for evaluation and testing only.
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