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Code Issues Wiki Activity

dmesg documentation

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Ray Morris 2025-04-29 00:31:43 -05:00
parent 826ec9d07d
commit bd80148c6a
2 changed files with 13 additions and 1 deletions
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1
docs/Cli.md
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@ -76,6 +76,7 @@ While connected to the CLI, all Logical Switches are temporarily disabled (5.1.0
| `bootlog` | Show boot events | | `bootlog` | Show boot events |
| `color` | Configure colors | | `color` | Configure colors |
| `defaults` | Reset to defaults and reboot | | `defaults` | Reset to defaults and reboot |
| `dmesg` | Show init logs from [serial_printf_debugging](./development/serial_printf_debugging.md) |
| `dfu` | DFU mode on reboot | | `dfu` | DFU mode on reboot |
| `diff` | List configuration changes from default | | `diff` | List configuration changes from default |
| `dump` | Dump configuration | | `dump` | Dump configuration |

13
docs/development/serial_printf_debugging.md
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@ -4,7 +4,9 @@
INAV offers a function to use serial `printf` style debugging. INAV offers a function to use serial `printf` style debugging.
This provides a simple and intuitive debugging facility. This facility is only available after the serial sub-system has been initialised, which should be adequate for all but the most hard-core debugging requirements. This provides a simple and intuitive debugging facility.
This facility is only available after the serial sub-system has been initialised, but logs generated prior to serial
initialization can be obtained via the `dmesg` functionality.
In order to use this feature, the source file must include `common/log.h`. In order to use this feature, the source file must include `common/log.h`.
@ -137,3 +139,12 @@ The output will be formatted as follows:
For the Configurator, debug messages are shown in the developer console log. For the Configurator, debug messages are shown in the developer console log.
Note: The numeric value in square brackets is the FC uptime in seconds. Note: The numeric value in square brackets is the FC uptime in seconds.
To see printf-style log messages generated prior serial initialization, reserve about 2KB-4KB RAM to buffer the
log) by defining DMESG_SIZE:
#define DMESG_SIZE 2048
Then `make clean` and `make`.
Then in the CLI you can run `dmesg` to see the buffered log.
Note dmesg also requires that a serial port be defined for serial debugging.