u-boot/board/trab
Wolfgang Denk 52b1bf2c5c Make linking against libgcc configurable
Many (especially ARM) tool chains seem to come with broken or
otherwise unusable (for the purposes of builing U-Boot) run-time
support libraries `libgcc.a'. By using the "USE_PRIVATE_LIBGCC"
setting we allow to use alternative libraries instead.

"USE_PRIVATE_LIBGCC" can either be set as an environment variable in
the shell, or as a command line argument when running "make", i. e.
	$ make USE_PRIVATE_LIBGCC=yes
or
	$ USE_PRIVATE_LIBGCC=yes
	$ export USE_PRIVATE_LIBGCC
	$ make

The value of "USE_PRIVATE_LIBGCC" is the name of the directory which
contains the alternative run-time support library `libgcc.a'. The
special value "yes" selects the directory $(OBJTREE)/lib_$(ARCH) .

Note that not all architectures provide an alternative `libgcc.a' in
their lib_$(ARCH) directories - so far, only ARM does.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Prafulla Wadaskar <prafulla@marvell.com>
cc: Stefan Roese <sr@denx.de>
2009-07-27 00:11:32 +02:00
..
auto_update.c Fix e-mail address of Gary Jennejohn. 2009-05-15 22:11:59 +02:00
cmd_trab.c General help message cleanup 2009-06-12 20:47:16 +02:00
config.mk arm: unify linker script 2009-06-12 20:39:52 +02:00
flash.c Redundant Environment: protect full sector size 2009-06-04 00:16:16 +02:00
lowlevel_init.S Fix e-mail address of Gary Jennejohn. 2009-05-15 22:11:59 +02:00
Makefile Make linking against libgcc configurable 2009-07-27 00:11:32 +02:00
memory.c board/trab/memory.c: Fix compile problems. 2008-12-16 22:32:25 +01:00
Pt1000_temp_data.h * Patch by Martin Krause, 11 Sep 2003: 2003-09-11 23:06:34 +00:00
README.kbd Initial revision 2002-11-03 00:24:07 +00:00
rs485.c Fix e-mail address of Gary Jennejohn. 2009-05-15 22:11:59 +02:00
rs485.h Fix e-mail address of Gary Jennejohn. 2009-05-15 22:11:59 +02:00
trab.c General help message cleanup 2009-06-12 20:47:16 +02:00
trab_fkt.c trab: make trab_fkt standalone code independent of libgcc 2008-12-16 16:22:50 +01:00
tsc2000.c ARM: Use do_div() instead of division for "long long". 2008-09-09 02:14:41 +02:00
tsc2000.h Big white-space cleanup. 2008-05-21 00:14:08 +02:00
u-boot.lds Fix e-mail address of Gary Jennejohn. 2009-05-15 22:11:59 +02:00
vfd.c stdio/device: rework function naming convention 2009-07-18 00:27:46 +02:00

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.