default i/o. Serial console can be forced with
environment 'console=serial'.
- When CONFIG_SILENT_CONSOLE is defined, all console
- messages (by U-Boot and Linux!) can be silenced with
- the "silent" environment variable. See
- doc/README.silent for more information.
-
CONFIG_SYS_CONSOLE_BG_COL: define the backgroundcolor, default
is 0x00.
CONFIG_SYS_CONSOLE_FG_COL: define the foregroundcolor, default
must be defined, to setup the maximum idle timeout for
the SMC.
-- Pre-Console Buffer:
- Prior to the console being initialised (i.e. serial UART
- initialised etc) all console output is silently discarded.
- Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to
- buffer any console messages prior to the console being
- initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ
- bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is
- a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ
- bytes are output before the console is initialised, the
- earlier bytes are discarded.
-
- Note that when printing the buffer a copy is made on the
- stack so CONFIG_PRE_CON_BUF_SZ must fit on the stack.
-
- 'Sane' compilers will generate smaller code if
- CONFIG_PRE_CON_BUF_SZ is a power of 2
-
- Autoboot Command:
CONFIG_BOOTCOMMAND
Only needed when CONFIG_BOOTDELAY is enabled;
instead.
- Video support:
- CONFIG_VIDEO
-
- Define this to enable video support (for output to
- video).
-
CONFIG_VIDEO_CT69000
Enable Chips & Technologies 69000 Video chip