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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2021/12/29 13:55:57 UTC

[GitHub] [incubator-nuttx] jlaitine opened a new pull request #5111: boards/m100pfsevp: Decrease DDR lane temination values to 40 ohm and …

jlaitine opened a new pull request #5111:
URL: https://github.com/apache/incubator-nuttx/pull/5111


   …increase BCLKSCLK_OFFSET
   
   This fixes problems with DDR training sequence on aries m100pfs board
   
       - Set LIBERO_SETTING_RPC_ODT_* to 6, which matches 40 ohm. Originally it was 120 ohm (2)
       - Set BCLKSCLK_OFFSET value to 5, which matches icicle board setting
   
   Signed-off-by: Jukka Laitinen <ju...@ssrc.tii.ae>
   
   ## Summary
   
   This fixes some DDR training / boot problems on aries m100pfs risc-v board. It seems that the DDR lane termination values were just wrong
   
   ## Impact
   
   Increases boot stability
   
   ## Testing
   
   Tested on Aries M100PFS board; no more DDR training errors/re-tries observed
   


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[GitHub] [incubator-nuttx] xiaoxiang781216 merged pull request #5111: boards/m100pfsevp: Decrease DDR lane temination values to 40 ohm and …

Posted by GitBox <gi...@apache.org>.

xiaoxiang781216 merged pull request #5111:
URL: https://github.com/apache/incubator-nuttx/pull/5111


   


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