'[C-13] Hi3719C'에 해당되는 글 3건

  1. 2014.02.06 [Hi3719C] Setting the CPU Frequency
  2. 2014.02.05 [Hi3719C] DVFS 설정
  3. 2014.01.15 [Hi3719C] Development Compilation

The current SDK has five default CPU profiles (400 MHz, 600 MHz, 800 MHz, 1000 MHz,

and 1200 MHz).


To manually set the CPU frequency, disable dynamic CPU frequency and voltage scaling by

running the following command:

$ echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor


Then set the CPU frequency by running the following command:

$ echo 400000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed


Where, 400000 is in kHz. That is, the CPU frequency is set to 400 MHz. Note that the CPU

voltage is also synchronized to the preset stable voltage that supports this frequency.

'[C-13] Hi3719C' 카테고리의 다른 글

[Hi3719C] DVFS 설정  (0) 2014.02.05
[Hi3719C] Development Compilation  (0) 2014.01.15
Posted by eoseontaek


DVFS (Dynamic Voltage and Frequency Scaling )


Enable dynamic CPU frequency and voltage scaling

$ echo interactive > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

file : \device\hisilicon\Hi3719CV100\etc\init.Hi3719CV100.sh


Disable dynamic CPU frequency and voltage scaling

$ echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor



'[C-13] Hi3719C' 카테고리의 다른 글

[Hi3719C] Setting the CPU Frequency  (0) 2014.02.06
[Hi3719C] Development Compilation  (0) 2014.01.15
Posted by eoseontaek

Configuring the Environment


$ source build/envsetup.sh

$ lunch Hi3719CV100-eng


[All Images]

Run the following command in the code root directory

$ cd ~/Android-K/src

$ make bigfish -j16 2>&1 | tee bigfish.log


[Kernel Image]

Kernel Directory : 

./device/hisilicon/bigfish/sdk/source/kernel/linux-3.4.y


Run the following command in the code root directory

$ make kernel –j16 2>&1 | tee kernel.log


Modifying Android Kernel Configuration :

$ make kernel_menuconfig


[System Image]

Run the following command in the code root directory:

$ make ext4fs -j16 2>&1 | tee ext4fs.log


[Fastboot Image]

fastboot directory : 

./device/hisilicon/bigfish/sdk/source/boot/fastboot


Run the following command in the code root directory:

$ make hiboot -j16 2>&1 | tee hiboot.log


Deleting Compilation Results


Run the following command in the code root directory:

$ make clean



Modifying the HiSilicon SDK Configuration File


The SDK configuration file is stored in the following directory:

device/hisilicon/bigfish/sdk/configs/


Go to the SDK directory by running the following command:

$ cd device/hisilicon/bigfish/sdk


Run the following command to modify the corresponding configuration file:

$ make menuconfig SDK_CFGFILE=configs/hi3719cdmo1b_hi3719cv100_android_cfg.mak






'[C-13] Hi3719C' 카테고리의 다른 글

[Hi3719C] Setting the CPU Frequency  (0) 2014.02.06
[Hi3719C] DVFS 설정  (0) 2014.02.05
Posted by eoseontaek
이전버튼 1 이전버튼