diff options
author | norly <ny-git@enpas.org> | 2019-02-22 15:14:17 +0100 |
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committer | norly <ny-git@enpas.org> | 2019-02-22 15:14:17 +0100 |
commit | e9e7dd19ccd4d7a28637348f2d3609ad250aba28 (patch) | |
tree | 900b360417353373ba7dfaebb0505db9502114ef | |
parent | 7cb931ffb44a39c9b6b8c16e3aba7a61d808ddb3 (diff) |
readme.rst: Add note on termination, minor fixes
-rw-r--r-- | readme.rst | 16 |
1 files changed, 15 insertions, 1 deletions
@@ -26,7 +26,7 @@ This driver is an effort to turn abundant ELM327 based OBD interfaces into full-fledged (as far as possible) CAN interfaces. Since the ELM327 was never meant to be a stand-alone CAN controller, -the driver has to switch between its modes asa quickly as possible in +the driver has to switch between its modes as quickly as possible in order to approximate full-duplex operation. As such, elmcan is a best-effort driver. However, this is more than @@ -308,9 +308,23 @@ Rationale behind the chosen configuration +A note on CAN bus termination +------------------------------ + +Your adapter may have resistors soldered in which are meant to terminate +the bus. This is correct when it is plugged into a OBD-II socket, but +not helpful when trying to tap into the middle of an existing CAN bus. + +If communications don't work with the adapter connected, check for the +termination resistors on its PCB and try removing them. + + + To Do list for future development ---------------------------------- - DMA capable rx/tx buffers + (is this relevant for this driver?) - flushing of ``tx_work`` is too late in ``ldisc_close()`` + (is this still the case?) |