Android NDKをつかってRETRONFREAK5でHello, Worldしてみます。
circuit-board.de
まずはAndroid NDK（android-ndk-r10e-windows-x86_64.zip）をダウンロードします。
developer.android.com
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;
}
