forked from Imagelibrary/rtems
479c86ddbd
Please find attached the two files that have been changed relative to
980921 . The changes here are in the handling of the counter-timer used
as the basis for the rtems executive clock. For the most part, these
are housekeeping changes.
The PSCLK frequency change in start.s... was a part of several
bug-fixes. The fix improves executive clock and timer accuracy.
changes :
start.s -- All timers are disabled by the initialization routine
-- PSCLK ( used by clock and timers ) frequency changed to 1MHz
The clock_initialize routine now assumes that the PSCLK frequency is
exactly 1 MHz.
ckinit.c
Clock_isr -- removed division by 1000. Now use 'static'
variable -- clock_intial_isr_value -- to reset Clock_isrs variable.
clock_initialize -- moved counter timer initialization here. Values
used to configure the timer are totally dependent on
BSP_configuration.microseconds_per_tick ( and the PSCLK assumption).
Initializes clock_initial_isr_value used by th Clock_isr to reset
Clock_isrs.
clock_on -- no longer configures the timer, just enables it.
Since altering the number of sections in the BSP, I decided to give it a
good "once over" . The clock handling is now cleaner.
#
# $Id$
#
This is the top level of the RTEMS directory structure. The following
is a description of the files and directories in this directory:
Makefile.in
The top-level Make command file used to build the C implementation
of RTEMS. [RTEMS assumes the use of GNU make.]
README
This file.
REQUIRES
A list of the other tools which are assumed to be installed
before RTEMS is built.
SUPPORT
Information on third-party support for RTEMS.
build-tools
This directory contains the source for various utilities
needed to build RTEMS.
make
Make command files "included" from those in the source distribution.
[RTEMS assumes the use of GNU make.]
patches
This directory contains patches for this release of RTEMS.
src
This directory contains the source code for the C
implementation of RTEMS as well as the test suites, sample
applications, Board Support Packages, Device Drivers, and
support libraries.