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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2011-02-17 13:25:10 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2011-02-17 13:25:10 +0000 |
| commit | f383c6df9a3fcd7421725732edf7c3c1e47951af (patch) | |
| tree | d78b325ef0344cf3dbe684092ce8df7790392b55 /c/src/lib/libbsp/m68k/uC5282/startup/linkcmds | |
| parent | 2011-02-17 Sebastian Huber <sebastian.huber@embedded-brains.de> (diff) | |
| download | rtems-f383c6df9a3fcd7421725732edf7c3c1e47951af.tar.bz2 | |
2011-02-17 Till Straumann <strauman@slac.stanford.edu>
PR 1738/bsps
* README, startup/bspstart.c, startup/linkcmds: Add support for dynamic
clock speed determination. This algorithm is described in the README
file. The output of the RTEMS Timing Tests was moved to TIMES to
signicantly shrink the README.
* TIMES: New file.
Diffstat (limited to 'c/src/lib/libbsp/m68k/uC5282/startup/linkcmds')
| -rw-r--r-- | c/src/lib/libbsp/m68k/uC5282/startup/linkcmds | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/c/src/lib/libbsp/m68k/uC5282/startup/linkcmds b/c/src/lib/libbsp/m68k/uC5282/startup/linkcmds index 58e3c6155f..47ea80d8d6 100644 --- a/c/src/lib/libbsp/m68k/uC5282/startup/linkcmds +++ b/c/src/lib/libbsp/m68k/uC5282/startup/linkcmds @@ -30,8 +30,17 @@ _DownloadLocation = 0x40000; /* * System clock speed + * + * If autodetection of the system clock pased on the PLL ref. clock + * (AFAIK 8MHz for both 64MHz and 80MHz boards) doesn't work then + * you can: + * - define (nonzero) system clock speed from app- linkflags (or here) + * - use a uCbootloader env. var: SYS_CLOCK_SPEED to define it. + * You can also redefine the PLL reference clock speed from linkflags + * or here... */ -_CPUClockSpeed = DEFINED(_CPUClockSpeed) ? _CPUClockSpeed : 64000000 ; +_CPUClockSpeed = DEFINED(_CPUClockSpeed) ? _CPUClockSpeed : 0 ; +_PLLRefClockSpeed = DEFINED(_PLLRefClockSpeed) ? _PLLRefClockSpeed : 8000000; /* * Location of on-chip devices |