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Diffstat (limited to 'doc/README.fsl-ddr')
| -rw-r--r-- | doc/README.fsl-ddr | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/README.fsl-ddr b/doc/README.fsl-ddr index 3992640ba3..59583b3fcd 100644 --- a/doc/README.fsl-ddr +++ b/doc/README.fsl-ddr @@ -268,6 +268,13 @@ be activated by saving an environment variable "ddr_interactive". The value doesn't matter. Once activated, U-boot prompts "FSL DDR>" before enabling DDR controller. The available commands can be seen by typing "help". +Another way to enter debug mode without using environment variable is to send +a key press during boot, like one would do to abort auto boot. To save booting +time, no additioal delay is added so the window to send the key press is very +short. For example, user can send the key press using reset command followed by +hitting enter key twice. In case of power on reset, user can keep hitting any +key while applying the power. + The example flow of using interactive debugging is type command "compute" to calculate the parameters from the default type command "print" with arguments to show SPD, options, registers |