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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2021/01/13 16:40:35 UTC

[GitHub] [incubator-nuttx] raiden00pl commented on pull request #2674: nrf52_i2c: add support for I2C_M_NOSTOP and I2C_M_NOSTART flags

raiden00pl commented on pull request #2674:
URL: https://github.com/apache/incubator-nuttx/pull/2674#issuecomment-759572116


   I don't see how "list mode" can help in this case. 
   Each TASKS_STARTTX trigger causes a START byte to be sent. EasyDMA can only update the data pointer (TXD.PTR), but we still need to trigger TASKS_START to send data.
   
   We need contiguous buffer in memory to send it with a single TASKS_STARTTX to prevent HW from sending multiple START bytes between messages. 
   
   Agree it looks bad but unfortunately I haven't found any other working solution.


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