구차니의 잡동사니 모음

$ gcc -v

Using built-in specs.

COLLECT_GCC=gcc

COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabihf/4.9/lto-wrapper

Target: arm-linux-gnueabihf

Configured with: ../src/configure -v --with-pkgversion='Raspbian 4.9.2-10' --with-bugurl=file:///usr/share/doc/gcc-4.9/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.9 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.9 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libitm --disable-libquadmath --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.9-armhf/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.9-armhf --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.9-armhf --with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-sjlj-exceptions --with-arch=armv6 --with-fpu=vfp --with-float=hard --enable-checking=release --build=arm-linux-gnueabihf --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf

Thread model: posix

gcc version 4.9.2 (Raspbian 4.9.2-10) 

~/tools/arm-bcm2708/arm-bcm2708hardfp-linux-gnueabi/bin $ arm-linux-gnueabihf-gcc -v

Using built-in specs.

COLLECT_GCC=arm-linux-gnueabihf-gcc

COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabihf/4.9/lto-wrapper

Target: arm-linux-gnueabihf

Configured with: ../src/configure -v --with-pkgversion='Raspbian 4.9.2-10' --with-bugurl=file:///usr/share/doc/gcc-4.9/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.9 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.9 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libitm --disable-libquadmath --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.9-armhf/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.9-armhf --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.9-armhf --with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-sjlj-exceptions --with-arch=armv6 --with-fpu=vfp --with-float=hard --enable-checking=release --build=arm-linux-gnueabihf --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf

Thread model: posix

gcc version 4.9.2 (Raspbian 4.9.2-10)

~/tools/arm-bcm2708 $ ll

total 20

drwxr-xr-x 7 pi pi 4096 Sep 26 23:28 arm-bcm2708hardfp-linux-gnueabi

drwxr-xr-x 7 pi pi 4096 Sep 26 23:26 arm-bcm2708-linux-gnueabi

drwxr-xr-x 8 pi pi 4096 Sep 26 23:28 arm-rpi-4.9.3-linux-gnueabihf

drwxr-xr-x 7 pi pi 4096 Sep 26 23:30 gcc-linaro-arm-linux-gnueabihf-raspbian

drwxr-xr-x 7 pi pi 4096 Sep 26 23:29 gcc-linaro-arm-linux-gnueabihf-raspbian-x64 

    //

    // The I2C0 peripheral must be enabled before use.

    //

    SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C0);

    //

    // For this example I2C0 is used with PortB[3:2].  The actual port and

    // pins used may be different on your part, consult the data sheet for

    // more information.  GPIO port B needs to be enabled so these pins can

    // be used.

    // TODO: change this to whichever GPIO port you are using.

    //

    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);

    //

    // Configure the pin muxing for I2C0 functions on port B2 and B3.

    // This step is not necessary if your part does not support pin muxing.

    // TODO: change this to select the port/pin you are using.

    //

    GPIOPinConfigure(GPIO_PB2_I2C0SCL);

    GPIOPinConfigure(GPIO_PB3_I2C0SDA);

    //

    // Select the I2C function for these pins.  This function will also

    // configure the GPIO pins pins for I2C operation, setting them to

    // open-drain operation with weak pull-ups.  Consult the data sheet

    // to see which functions are allocated per pin.

    // TODO: change this to select the port/pin you are using.

    //

    GPIOPinTypeI2CSCL(GPIO_PORTB_BASE, GPIO_PIN_2);

    GPIOPinTypeI2C(GPIO_PORTB_BASE, GPIO_PIN_3); 

$ cat /etc/init.d/cpufrequtils

#!/bin/sh

### BEGIN INIT INFO

# Provides:       cpufrequtils

# Required-Start: $remote_fs loadcpufreq

# Required-Stop:

# Default-Start:  2 3 4 5

# Default-Stop:

# Short-Description: set CPUFreq kernel parameters

# Description: utilities to deal with CPUFreq Linux

#       kernel support

### END INIT INFO

#

DESC="CPUFreq Utilities"

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

CPUFREQ_SET=/usr/bin/cpufreq-set

CPUFREQ_INFO=/usr/bin/cpufreq-info

CPUFREQ_OPTIONS=""

# use lsb-base

. /lib/lsb/init-functions

# Which governor to use. Must be one of the governors listed in:

#   cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors

#

# and which limits to set. Both MIN_SPEED and MAX_SPEED must be values

# listed in:

#   cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

# a value of 0 for any of the two variables will disabling the use of

# that limit variable.

#

# WARNING: the correct kernel module must already be loaded or compiled in.

#

# Set ENABLE to "true" to let the script run at boot time.

#

# eg:   ENABLE="true"

#       GOVERNOR="ondemand"

#       MAX_SPEED=1000

#       MIN_SPEED=500

ENABLE="true"

GOVERNOR="ondemand"

MAX_SPEED="0"

MIN_SPEED="0"

check_governor_avail() {

        info="/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors"

        if [ -f $info ] && grep -q "\<$GOVERNOR\>" $info ; then

                return 0;

        fi

        return 1;

}

[ -x $CPUFREQ_SET ] || exit 0

if [ -f /etc/default/cpufrequtils ] ; then

        . /etc/default/cpufrequtils

fi

# if not enabled then exit gracefully

[ "$ENABLE" = "true" ] || exit 0

if [ -n "$MAX_SPEED" ] && [ $MAX_SPEED != "0" ] ; then

        CPUFREQ_OPTIONS="$CPUFREQ_OPTIONS --max $MAX_SPEED"

fi

if [ -n "$MIN_SPEED" ] && [ $MIN_SPEED != "0" ] ; then

        CPUFREQ_OPTIONS="$CPUFREQ_OPTIONS --min $MIN_SPEED"

fi

if [ -n "$GOVERNOR" ] ; then

        CPUFREQ_OPTIONS="$CPUFREQ_OPTIONS --governor $GOVERNOR"

fi

CPUS=$(cat /proc/stat|sed -ne 's/^cpu\([[:digit:]]\+\).*/\1/p')

RETVAL=0

case "$1" in

        start|force-reload|restart|reload)

                log_action_begin_msg "$DESC: Setting $GOVERNOR CPUFreq governor"

                if check_governor_avail ; then

                        for cpu in $CPUS ; do

                                log_action_cont_msg "CPU${cpu}"

                                $CPUFREQ_SET --cpu $cpu $CPUFREQ_OPTIONS 2>&1 > /dev/null || \

                                        RETVAL=$?

                        done

                        log_action_end_msg $RETVAL ""

                else

                        log_action_cont_msg "disabled, governor not available"

                        log_action_end_msg $RETVAL

                fi

                ;;

        stop)

                ;;

        *)

                echo "Usage: $0 {start|stop|restart|reload|force-reload}"

                exit 1

esac

exit 0