RK3288|RK3288 android7.1 mlx90640温度传感器调试 RK3288android7.1mlx90640温度传感器

(1) 驱动调试：
1.1） dts 配置：

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1.2 添加kconfig

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1.3 修改makefile
1.4 添加tmp_mlx90640.c
#include
#include
#include
#include
#include
#include
#include
#include
#ifdef CONFIG_OF_GPIO
#include
#endif
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define DRIVER_NAME “mlx90640”
#define MLX90640_IOCTL_MAGIC ‘m’
#define MLX90640_GET_DATA _IOR(MLX90640_IOCTL_MAGIC, 1, int *)
#define MLX90640_SET_DATA _IOR(MLX90640_IOCTL_MAGIC, 2, int *)
#define DATA_LENGTH 1664
struct mlx90640_chip {
struct mutex i2c_lock;
struct i2c_client *client;
const char *names;
};
struct MLX90640_R_DATA{
uint16_t reg;
uint16_t size;
uint16_t buff[DATA_LENGTH];
};
struct MLX90640_W_DATA{
uint16_t reg;
uint16_t size;
uint16_t data;
};
struct mlx90640_chip *gchip = NULL;
static int mlx90640_open(struct inode *inode, struct file *filp)
{
return 0;
}
int mlx90640_release(struct inode *inode, struct file *filp)
{
return 0;
}
static int i2c_master_recv_(struct i2c_client *client,char *msgbuf,uint16_t *data,uint16_t nMemAdddressRead)
{
struct i2c_msg msgs[2];
struct i2c_adapter *adap = client->adapter;
int ret;
uint16_t bytesRemaining = nMemAdddressRead * 2;
int cnt = 0;
int i = 0;
uint16_t *p = data;
char i2cData[DATA_LENGTH];

msgs[0].addr = client->addr; msgs[0].flags = I2C_M_TEN; /* write */ msgs[0].len = 2; msgs[0].buf = msgbuf; msgs[1].addr = client->addr; msgs[1].flags = I2C_M_RD | I2C_M_NOSTART; msgs[1].len = bytesRemaining; msgs[1].buf = i2cData; memset(i2cData,0,bytesRemaining); ret = i2c_transfer(adap,&msgs[0],2); for(cnt = 0; cnt < nMemAdddressRead; cnt++){ i = cnt << 1; *p++ = ((uint16_t)i2cData[i] << 8) | i2cData[i+1]; } return 0;

}
static int mlx90640_write_data(struct i2c_client *client,uint16_t reg,uint16_t buf)
{
int ret = 0;
u8 abuf[4];
abuf[0] = reg >> 8;
abuf[1] = reg;
abuf[2] = buf >> 8;
abuf[3] = buf;
ret = i2c_master_send(client,abuf,4);
return ret;
}
static int mlx90640_read_data(struct i2c_client *client,uint16_t reg,uint16_t *data,uint16_t nMemAdddressRead)
{
int rc;
u8 msgbuf[2];
msgbuf[0] = reg >> 8;
msgbuf[1] = reg;
rc = i2c_master_recv_(client,msgbuf,data,nMemAdddressRead);
return 0;
}
static long mlx90640_ioctl(struct file file, unsigned int cmd,unsigned long arg)
{
struct MLX90640_R_DATA data;
struct MLX90640_W_DATA w_data;
mutex_lock(&gchip->i2c_lock);
switch(cmd){
case MLX90640_GET_DATA:
if(copy_from_user((void)&data,(void __user*)arg,sizeof(struct MLX90640_R_DATA))){
printk(“MLX90640_ioctl SE_IOC_GET_DATA copy_from_user error\n”);
mutex_unlock(&gchip->i2c_lock);
return -EFAULT;
}
if(mlx90640_read_data(gchip->client,data.reg,&data.buff[0],data.size) != 0){
printk(“MLX90640_ioctl read data failed,reg:0x%x ,size:%d \n”,data.reg,data.size);
mutex_unlock(&gchip->i2c_lock);
return -EFAULT;
}
if(copy_to_user((void __user*)arg,(void*)&data,sizeof(struct MLX90640_R_DATA))){
printk(“MLX90640_ioctl SE_IOC_GET_DATA copy_to_user error\n”);
mutex_unlock(&gchip->i2c_lock);
return -EFAULT;
}
break;
case MLX90640_SET_DATA:
if(copy_from_user((void*)&w_data,(void __user*)arg,sizeof(struct MLX90640_W_DATA))){
printk(“MLX90640_ioctl SE_IOC_SET_DATA copy_from_user error\n”);
mutex_unlock(&gchip->i2c_lock);
return -EFAULT;
}
mlx90640_write_data(gchip->client,w_data.reg,w_data.data);
break;
default:
printk(“MLX90640_ioctl cmd:0x%x error\n”,cmd);
break;
}
mutex_unlock(&gchip->i2c_lock);
return 0;
}
static struct file_operations mlx90640_fops =
{
.owner = THIS_MODULE,
.open = mlx90640_open,
.release = mlx90640_release,
.unlocked_ioctl = mlx90640_ioctl,
};
static struct miscdevice mlx90640_dev = {
.minor = MISC_DYNAMIC_MINOR,
.name = “mlx90640”,
.fops = &mlx90640_fops,
};
static int mlx90640_probe(struct i2c_client *client,const struct i2c_device_id *id)
{
struct mlx90640_chip *chip;
struct MLX90640_R_DATA data;
struct i2c_adapter *adapter = client->adapter;
int ret;

if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)){ return -ENODEV; } chip = devm_kzalloc(&client->dev,sizeof(struct mlx90640_chip), GFP_KERNEL); if (chip == NULL) return -ENOMEM; chip->names = DRIVER_NAME; chip->client = client; mutex_init(&chip->i2c_lock); gchip = chip; data.reg = 0x8000; data.size = 1; mlx90640_read_data(gchip->client,data.reg,&data.buff[0],data.size);

#if 0
struct MLX90640_W_DATA w_data;
w_data.reg = 0x800D;
w_data.size = 1;
w_data.data = https://www.it610.com/article/0x1291;
MLX90640_write_data(gchip->client,w_data.reg,w_data.data);
#endif
data.reg = 0x800D;
mlx90640_read_data(gchip->client,data.reg,&data.buff[1],data.size);
printk(“harris mlx90640_probe read 0x8000->0x%x 0x800D->0x%x\n”,data.buff[0],data.buff[1]);

ret = misc_register(&mlx90640_dev); return 0;

}
static int mlx90640_remove(struct i2c_client *client)
{
return 0;
}
static const struct i2c_device_id mlx90640_dt_id[] = {
{“mlx90640”, 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, mlx90640_dt_id);
static const struct of_device_id mlx90640_dt_ids[] = {
{ .compatible = “mlx90640”, },
{ }
};
MODULE_DEVICE_TABLE(i2c, mlx90640_dt_ids);
static struct i2c_driver mlx90640_driver = {
.probe = mlx90640_probe,
.remove = mlx90640_remove,
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(mlx90640_dt_ids),
},
.id_table = mlx90640_dt_id,
};
static int __init mlx90640_init(void)
{
return i2c_add_driver(&mlx90640_driver);
}
static void __exit mlx90640_exit(void)
{
i2c_del_driver(&mlx90640_driver);
}
subsys_initcall(mlx90640_init);
module_exit(mlx90640_exit);
MODULE_AUTHOR(“xxx”);
MODULE_DESCRIPTION(“i2c driver for mlx90640”);
MODULE_LICENSE(“GPL”);
(2) jni 部分：
2.1 修改frameworks/base/Android.mk 文件，添加需要编译的aidl文件

RK3288|RK3288 android7.1 mlx90640温度传感器调试

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2.2 在frameworks/base/core/java/android/os/目录下添加ITempMlsSensor.aidl

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2.3 添加aidl 文件后，编译后会生成ITempMlsSensor.java 重写里面的方法。
frameworks/base/services/core/java/com/android/server 目录下添加TempMlsSensor.java文件。内容如下：
package com.android.server;
import android.util.Slog;
import android.os.ITempMlsSensor;
import android.content.Context;
public class TempMlsSensor extends ITempMlsSensor.Stub{
private static final String TAG = “TempMlsSensor”;

private final Context mContext; public static final String TEMPMLSSENSOR_STATS_SERVICE = "TempMlsSensor"; public TempMlsSensor(Context context) { Slog.d(TAG,"TempMlsSensor"); mContext = context; }@Override public int TempMlsSensorOpen() throws android.os.RemoteException { return nativeTempMlsSensorOpen(); }@Override public int TempMlsSensorWrite(int value) throws android.os.RemoteException { return nativeTempMlsSensorWrite(value); }@Override public int TempMlsSensorReadValue() throws android.os.RemoteException { return nativeTempMlsSensorReadValue(); }@Override public byte[] TempMlsSensorRead(int length) throws android.os.RemoteException{return nativeTempMlsSensorRead(length); }@Override public int TempMlsSensorIoctl(int cmd, int value) throws android.os.RemoteException { return nativeTempMlsSensorIoctl(cmd,value); }@Override public int TempMlsSensorClose() throws android.os.RemoteException { return nativeTempMlsSensorClose(); }public static native int nativeTempMlsSensorOpen(); public static native int nativeTempMlsSensorWrite(int value); public static native byte[] nativeTempMlsSensorRead(int length); public static native int nativeTempMlsSensorReadValue(); public static native int nativeTempMlsSensorIoctl(int cmd,int value); public static native int nativeTempMlsSensorClose();

}
2.4 修改frameworks/base/service/core/jni/Android.mk

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2.5 添加com_android_server_TempMlsSensor.cpp
\frameworks\base\services\core\jni\在这目录下
内容如下：
/*

Copyright ? 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.
*/

#define LOG_TAG “TempMlsSensor”
#include “jni.h”
#include “JNIHelp.h”
#include “android_runtime/AndroidRuntime.h”
#include
#include
#include
#include
#include
#include
#include
#define MLX90640_IOCTL_MAGIC ‘m’
#define MLX90640_GET_DATA _IOR(MLX90640_IOCTL_MAGIC, 1, int *)
#define MLX90640_SET_DATA _IOR(MLX90640_IOCTL_MAGIC, 2, int *)
int mlx_fd=-1 ;
namespace android
{
static mlx90640_device_t *g_device;
static int init_native(mlx90640_device_t **device)
{
int ret ;
hw_module_t *module;
mlx90640_device_t *mlx90640_device;
ret=hw_get_module(MLX90640_HARDWARE_MODULE_ID,(hw_module_t const **)&module);
if(ret)
{

return -1;

}
ret = module->methods->open(module,NULL,(hw_device_t **)&mlx90640_device);
if(ret<0)
return -1;

*device=mlx90640_device;

return 0;
}
static jint TempMlsSensorOpen_native(JNIEnv* /* env /, jobject / clazz */)
{

init_native(&g_device); g_device->mlx90640_open(g_device); return 0;

}
static jint TempMlsSensorWrite_native(JNIEnv* /* env /, jobject / clazz */,jint value)
{

return 0;

}
static jbyteArray TempMlsSensorRead_native(JNIEnv* env , jobject /* clazz */,jint length)
{
jbyteArray byteArray = env->NewByteArray(768);

return byteArray;

}
static jint TempMlsSensorRead_native_value(JNIEnv* /* env /, jobject / clazz */)
{

return g_device->mlx90640_read(g_device);

}
//*/
static jint TempMlsSensorIoctl_native(JNIEnv* /* env /, jobject / clazz */,jint cmd ,jint value)
{
return 0;
}
static jint TempMlsSensorClose_native(JNIEnv* /* env /, jobject / clazz */)
{

//close(mlx_fd); return 0;

}
static const JNINativeMethod method_table[] = {
{ “nativeTempMlsSensorOpen”, “()I”, (void*)TempMlsSensorOpen_native },
{ “nativeTempMlsSensorWrite”, “(I)I”, (void*)TempMlsSensorWrite_native },
{ “nativeTempMlsSensorRead”, “(I)[B”, (void*)TempMlsSensorRead_native },
{ “nativeTempMlsSensorReadValue”, “()I”, (void*)TempMlsSensorRead_native_value },
{ “nativeTempMlsSensorIoctl”, “(II)I”, (void*)TempMlsSensorIoctl_native },
{ “nativeTempMlsSensorClose”, “()I”, (void*)TempMlsSensorClose_native },
};
int register_android_server_TempMlsSensor(JNIEnv *env)
{
return jniRegisterNativeMethods(env, “com/android/server/TempMlsSensor”,
method_table, NELEM(method_table));
}
};
(3) hal 部分：
3.1 添加mlx90640.h文件
hardware/libhardware/include/hardware/mlx90640.h
#ifndef HARDWARE_MLX90640_HAL_H
#define HARDWARE_MLX90640_HAL_H
#define MLX90640_HARDWARE_MODULE_ID “mlx90640”
#define MLX90640_API_VERSION HARDWARE_MODULE_API_VERSION(1,0)
struct mlx90640_device_t {
struct hw_device_t common;

int fd; int (*mlx90640_open)(struct mlx90640_device_t *device); int (*mlx90640_ioctl)(struct mlx90640_device_t *device, int which, int status); void (*mlx90640_close)(struct mlx90640_device_t *device); int (*mlx90640_read)(struct mlx90640_device_t *device);

};
【RK3288|RK3288 android7.1 mlx90640温度传感器调试】#endif /HARDWARE_LED_HAL_H/
3.2 修改hardware/libhardware/modules/Android.mk