Android NDKをつかってRETRONFREAK5でHello, Worldしてみます。
まずはAndroid NDK（android-ndk-r10e-windows-x86_64.zip）をダウンロードします。
サンプルプログラムを書き換えます。
>cd \android-ndk-r10e\samples\hello-jni >..\..\ndk-build
RETRONFREAK5に転送して実行します。
>adb push \android-ndk-r10e\samples\hello-jni\libs\armeabi\hello-jni /hello-jni >adb shell #busybox chmod +x /hello-jni #/hello-jni Hello, World.
Application.mk
APP_ABI := armeabi
Android.mk
# Copyright (C) 2009 The Android Open Source Project # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := hello-jni LOCAL_SRC_FILES := hello-jni.c #include $(BUILD_SHARED_LIBRARY) include $(BUILD_EXECUTABLE)
hello-jni.c
/* * Copyright (C) 2009 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ #include <string.h> #include <jni.h> /* This is a trivial JNI example where we use a native method * to return a new VM String. See the corresponding Java source * file located at: * * apps/samples/hello-jni/project/src/com/example/hellojni/HelloJni.java */ jstring Java_com_example_hellojni_HelloJni_stringFromJNI( JNIEnv* env, jobject thiz ) { //#if defined(__arm__) // #if defined(__ARM_ARCH_7A__) // #if defined(__ARM_NEON__) // #if defined(__ARM_PCS_VFP) // #define ABI "armeabi-v7a/NEON (hard-float)" // #else // #define ABI "armeabi-v7a/NEON" // #endif // #else // #if defined(__ARM_PCS_VFP) // #define ABI "armeabi-v7a (hard-float)" // #else // #define ABI "armeabi-v7a" // #endif // #endifexit // #else #define ABI "armeabi" // #endif //#elif defined(__i386__) // #define ABI "x86" //#elif defined(__x86_64__) // #define ABI "x86_64" //#elif defined(__mips64) /* mips64el-* toolchain defines __mips__ too */ // #define ABI "mips64" //#elif defined(__mips__) // #define ABI "mips" //#elif defined(__aarch64__) // #define ABI "arm64-v8a" //#else // #define ABI "unknown" //#endif return (*env)->NewStringUTF(env, "Hello from JNI ! Compiled with ABI " ABI "."); } int main(void) { printf("Hello, World.\n"); return 0; }
RETRONFREAK5のSERIAL(DNA)を取得します。
/*
* RETROFREAK GETDNA
*/
#include <stdio.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#define RKNAND_SYS_STORGAE_DATA_LEN 512
#define SN_SECTOR_OP_TAG 0x41444E53 // SNDA
#define RKNAND_GET_SN_SECTOR _IOW('d', 3, unsigned int)
typedef struct tagRKNAND_SYS_STORGAE
{
unsigned long tag;
unsigned long len;
unsigned char data[RKNAND_SYS_STORGAE_DATA_LEN];
}RKNAND_SYS_STORGAE;
int main(void)
{
int i;
RKNAND_SYS_STORGAE sysData;
for (i=0; i<512; i++) sysData.data[i]=0xff;
int sys_fd = open("/dev/rknand_sys_storage",O_RDWR,0);
if(sys_fd < 0){
printf("rknand_sys_storage open fail\n");
return -1;
}
//sn
sysData.tag = SN_SECTOR_OP_TAG;
sysData.len = RKNAND_SYS_STORGAE_DATA_LEN;
int ret = ioctl(sys_fd, RKNAND_GET_SN_SECTOR, &sysData);
if(ret) {
printf("get sn fail\n");
return -1;
}
for (i=480; i<496; i++) printf("%02x", sysData.data[i]);
printf("\n");
return 0;
}
