spiritedRunning

export PATH="$PATH:/home/rockchip/android-studio/bin"

alias ..="cd .."
alias ..2="cd ../.."
alias ..3="cd ../../.."
alias ..4="cd ../../../../"
alias ..5="cd ../../../../.."

spiritedRunning

/* stb_image - v2.29 - public domain image loader - http://nothings.org/stb
                                  no warranty implied; use at your own risk

   Do this:
      #define STB_IMAGE_IMPLEMENTATION
   before you include this file in *one* C or C++ file to create the implementation.

   // i.e. it should look like this:
   #include ...
   #include ...

spiritedRunning

// generate random MAC address
public static String randomMACAddress() {
    Random rand = new Random();
    byte[] macAddr = new byte[6];
    rand.nextBytes(macAddr);

    macAddr[0] = (byte) (macAddr[0] & (byte) 254);

    StringBuilder sb = new StringBuilder(18);
    for (byte b : macAddr) {

spiritedRunning

// 按分辨率压缩
public Bitmap compressBitmap(Bitmap tmpBitmap) {
    int w = tmpBitmap.getWidth() ;
    int h = tmpBitmap.getHeight() ;
    Matrix matrix = new Matrix();
    float scaleWidth = 800f / w;
    float scaleHeight = 600f / h;
    matrix.postScale(scaleWidth , scaleHeight);
    Bitmap endBitmap = Bitmap. createBitmap( tmpBitmap, 0 , 0 , tmpBitmap.getWidth() , tmpBitmap.getHeight() , matrix, true ) ;
    return endBitmap ;

spiritedRunning

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := binder_client.cpp
LOCAL_SHARED_LIBRARIES := liblog libcutils libbinder libutils
LOCAL_MODULE := binder_client
include $(BUILD_EXECUTABLE)


include $(CLEAR_VARS)
LOCAL_SRC_FILES := binder_server.cpp

spiritedRunning

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)

LOCAL_SRC_FILES := unix_server.c

LOCAL_MODULE := unixServer
LOCAL_SHARED_LIBRARIES := liblog

LOCAL_PRELINK_MODULE := false

spiritedRunning

a. Download
http://datahammer.de/downloads.html
7yuv_2.5_amd64.tar.gz

issue1:
error while loading shared libraries: libQtOpenGL.so.4: cannot open shared object file: No such file or directory
Solve:
sudo add-apt-repository ppa:rock-core/qt4
sudo apt-get update
sudo apt-get install libqtcore4   #optional

spiritedRunning

[
    "configurations": [
        {
            "name": "Linux",
            "includePath": [
                "${workspaceFolder}/**"
            ],
            "defines": [],
            "compilerPath": "/usr/bin/gcc",
            "cStandard": "c17",

spiritedRunning

#include <stdio.h>
#include <dirent.h>
#include <string.h>

void get_cpu_load() {
    FILE* fp = popen("uptime | awk '{print $(NF-2)}'", "r");
    if (fp == NULL) {
        printf("Failed to get CPU load.\n");
        return;
    }

spiritedRunning

// Step 1

interface ISerialPort {
  oneway tx(uint8_t data);
  rx() generates (uint8_t data);
};

// SerialPort.h - generated by hidl-gen
struct SerialPort : public V1_0::ISerialPort {
  // Methods from ::vendor:: labworks::serialport::V1 0::ISerialPort follow.