[GitHub] ccollins476ad opened a new pull request #1375: [DO NOT MERGE] I2C retries - Driver

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ccollins476ad opened a new pull request #1375: [DO NOT MERGE] I2C retries - Driver
URL: https://github.com/apache/mynewt-core/pull/1375
 
 
   (dev list discussion: https://lists.apache.org/thread.html/bd2b854cbf7d6e0811fff33177c85fa1435dff7f1fb3c8baab6061e0@%3Cdev.mynewt.apache.org%3E)
   
   This PR implements I2C retries at the "driver level".  This is an alternative to the "HAL level" implementation here: https://github.com/apache/mynewt-core/pull/1373
   
   This PR contains the following changes:
   
   1. Define a common set of error code for the I2C HAL.
   2. Modify the nRFxxx HAL I2C implementation so that it uses the new set of error codes.
   3. Define a new library: `hw/drivers/i2c/i2cn` (I2C-n, as in "n retries").
   4. Update the drivers in `apache-mynewt-core` to use i2cn with retries.
   
   *Note:* The only HAL implementation modified by this PR is nRFxxx. This PR does not break the other implementations, but they are continue to return inconsistent error codes.

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