From c609719b8d1b2dca590e0ed499016d041203e403 Mon Sep 17 00:00:00 2001 From: wdenk Date: Sun, 3 Nov 2002 00:24:07 +0000 Subject: Initial revision --- board/trab/README.kbd | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 board/trab/README.kbd (limited to 'board/trab/README.kbd') diff --git a/board/trab/README.kbd b/board/trab/README.kbd new file mode 100644 index 000000000..3db00bcce --- /dev/null +++ b/board/trab/README.kbd @@ -0,0 +1,44 @@ + +The TRAB keyboard implementation is similar to that for LWMON and +R360MPI boards. The only difference concerns key naming. There are 4 +keys on TRAB: 1, 2, 3, 4. + +1) The "kbd" command provides information about the current state of + the keys. For example, + + TRAB # kbd + Keys: 1 0 1 0 + + means that keys 1 and 3 are pressed. The keyboard status is also + stored in the "keybd" environment variable. In this example we get + + keybd=1010 + +2) The "preboot" variable is set according to current environment + settings and keys pressed. This is an example: + + TRAB # setenv magic_keys XY + TRAB # setenv key_magicX 12 + TRAB # setenv key_cmdX echo ## Keys 1 + 2 pressed ##\;echo + TRAB # setenv key_magicY 13 + TRAB # setenv key_cmdY echo ## Keys 1 + 3 pressed ##\;echo + + Here "magic_keys=XY" means that the "key_magicX" and "key_magicY" + variables will be checked for a match. Each variable "key_magic*" + defines a set of keys. In the our example, if keys 1 and 3 are + pressed during reset, then "key_magicY" matches, so the "preboot" + variable will be set to the contents of "key_cmdY": + + preboot=echo ## Keys 1 + 3 pressed ##;echo + +3) The TRAB board has optional modem support. When a certain key + combination is pressed on the keyboard at power-on, the firmware + performs the necessary initialization of the modem and allows for + dial-in. The key combination is specified in the + "include/configs/trab.h" file. For example: + + #define CONFIG_MODEM_KEY_MAGIC "23" + + means that modem will be initialized if and only if both keys 2, 3 + are pressed. Note that the format of this string is similar to the + format of "key_magic*" environment variables described above. -- cgit v1.2.3