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Diffstat (limited to 'docs/i2c-debugging.md')
| -rw-r--r-- | docs/i2c-debugging.md | 60 |
1 files changed, 33 insertions, 27 deletions
diff --git a/docs/i2c-debugging.md b/docs/i2c-debugging.md index a1a56db285..7ab84f9d8d 100644 --- a/docs/i2c-debugging.md +++ b/docs/i2c-debugging.md @@ -11,38 +11,44 @@ Tracing You can use the `i2ctrace` command to monitor (ranges of) addresses: - i2ctrace [list - | disable <id> - | enable <port> <address> - | enable <port> <address-low> <address-high>] +``` +i2ctrace [list + | disable <id> + | enable <port> <address> + | enable <port> <address-low> <address-high>] +``` For example: - > i2ctrace enable 0 0x10 0x30 - > i2ctrace enable 0 0x40 0x50 - > i2ctrace list - id port address - -- ---- ------- - 0 0 0x10 to 0x30 - 1 0 0x40 to 0x50 - ... debug spam may follow ... - i2c: write 0:0x50 A8 - i2c: read 0:0x50 00 02 00 06 00 44 - ... - > i2ctrace disable 1 - > i2ctrace list - id port address - -- ---- ------- - 0 0 0x10 to 0x30 +``` +> i2ctrace enable 0 0x10 0x30 +> i2ctrace enable 1 0x20 +> i2ctrace list +id port address +-- ---- ------- +0 0 0x10 to 0x30 +1 1 0x40 to 0x50 +... debug spam may follow ... +i2c: 1:0x20 wr 0x10 rd 0x01 0x00 +i2c: 1:0x20 wr 0x10 0x01 0x00 +... +> i2ctrace disable 1 +> i2ctrace list +id port address +-- ---- ------- +0 0 0x10 to 0x30 +``` A maximum of 8 debug entries are supported at a single time. Note that `i2ctrace enable` will merge debug entries when possible: - > i2ctrace enable 0 0x10 0x30 - > i2ctrace enable 0 0x40 0x50 - > i2ctrace enable 0 0x31 0x3f - > i2ctrace list - id port address - -- ---- ------- - 0 0 0x10 to 0x50 +``` +> i2ctrace enable 0 0x10 0x30 +> i2ctrace enable 0 0x40 0x50 +> i2ctrace enable 0 0x31 0x3f +> i2ctrace list +id port address +-- ---- ------- +0 0 0x10 to 0x50 +```
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