1.pick up对比

pick up 也就是手机中的抬起亮屏。

物理陀螺仪版本的pick up 底层驱动pickup.c                    （陀螺仪辅助精度高）
虚拟陀螺仪版本的pick up 不使用陀螺仪，驱动文件 acc_pickup.c  （没有陀螺仪辅助精度低）

移植三部分： HAL----Kernel----SCP

2.SCP

1.添加驱动文件

路径：
vendor/mediatek/proprietary/tinysys/freertos/source/middleware/contexthub/VIRT_Driver

2.添加编译环境(打开开关)

路径：
vendor/mediatek/proprietary/tinysys/freertos/source/project/CM4_A/平台/机型/ProjectConfig.mk

CFG_MOTION_SUPPORT = yes
CFG_PICKUP_SUPPORT = yes            //定义的开关（该注释不能添加进代码）
CFG_WIN_ORIENTATION_SUPPORT = yes

路径：
vendor/mediatek/proprietary/tinysys/freertos/source/project/CM4_A/平台/platform/feature_config/chre.mk

######## pickup ########
ifeq ($(CFG_PICKUP_SUPPORT),yes)
C_FILES  += $(SOURCE_DIR)/middleware/contexthub/VIRT_Driver/pickup.c
endif

注：编译过程中如果显示内存不够

路径：
vendor/mediatek/proprietary/tinysys/freertos/source/project/CM4_A/平台/platform/Setting.ini

pedometer:9600
pickup:9500             //扩大pickup的内存大小
stationary:2898

3.修改底层数据上报方式

路径：vendor/mediatek/proprietary/tinysys/freertos/source/middleware/contexthub/contexthub_fw.c

static void initSensorReportingInfo(void)
{
    ....
    sensorReportingMode[SENSOR_TYPE_PICK_UP_GESTURE] = onChange;            //修改为onchange的模式
    sensorAccurancyMode[SENSOR_TYPE_PICK_UP_GESTURE] = SENSOR_STATUS_ACCURACY_HIGH;
    ...
}
 
static void contextHubTransferOnChangeSensor(uint8_t mtk_type, const struct mtkActiveSensor *sensor)
{
    ...
     case SENSOR_TYPE_PICK_UP_GESTURE:  //新增
          //osLog(LOG_INFO, "mtk_type: %d send flush action\n", mtk_type);
          dummy.value[0] = (int32_t)(sensor->buffer.single[numSamples].idata);
          ret = contextHubSramFifoWrite(&dummy);
          if (ret == SRAM_FIFO_FULL)
               contextHubSramFifoRead();
          break;
    ...
}

3.Kernel层设置

1.打开开关

路径1：
kernel-4.14/arch/arm64/configs/$project_defconfig

路径2：
kernel-4.14/arch/arm64/configs/$project_debug_defconfig

CONFIG_MTK_TILTDETECTHUB=y
CONFIG_MTK_PICKUPHUB=y              //打开这个开关
CONFIG_CUSTOM_KERNEL_SENSORHUB=y

2.修改上报方式

路径：
kernel-4.14/drivers/misc/mediatek/sensors-1.0/sensorHub/SCP_nanoHub/SCP_nanoHub.c

mSensorState[SENSOR_TYPE_PICK_UP_GESTURE].sensorType =
        SENSOR_TYPE_PICK_UP_GESTURE;
    mSensorState[SENSOR_TYPE_PICK_UP_GESTURE].rate = SENSOR_RATE_ONCHANGE;      //onchange类型
    mSensorState[SENSOR_TYPE_PICK_UP_GESTURE].timestamp_filter = false;

3.修改数据上报方式

路径：
kernel-4.14/drivers/misc/mediatek/sensors-1.0/situation/pickup_gesture/pickup_gesture.c

static int pickup_gesture_recv_data(struct data_unit_t *event,
    void *reserved)
{
    int err = 0;
 
    if (event->flush_action == FLUSH_ACTION)
        pr_debug("pickup_gesture do not support flush\n");
    else if (event->flush_action == DATA_ACTION)
        err = situation_data_report_t(ID_PICK_UP_GESTURE,
                (uint32_t)event->data[0], (int64_t)event->time_stamp);    //report的方式
    return err;
}

4.HAL层

1.修改sensor信息

路径：
vendor/mediatek/proprietary/hardware/sensor/sensors-1.0/SensorList.cpp

#ifdef CUSTOM_KERNEL_PICK_UP_SENSOR
    memset(&sensor, 0, sizeof(struct sensor_t));
    sensor.name = "XXXXXX";                          //X代表自定义
    sensor.vendor = "XXXXX";                         //X代表自定义
    sensor.version = PICK_UP_VERSION;
    sensor.handle = ID_PICK_UP_GESTURE + ID_OFFSET;
    sensor.type =  XXXXXXXX;                         //X代表传感器类型
    sensor.maxRange = PICK_UP_RANGE;
    sensor.resolution = PICK_UP_RESOLUTION;
    sensor.power = PICK_UP_POWER;
    sensor.minDelay = PICK_UP_MAXDELAY;
    sensor.fifoReservedEventCount = PICK_UP_FIFO_RESERVE_COUNT;
    sensor.fifoMaxEventCount = PICK_UP_FIFO_MAX_COUNT;
    sensor.stringType = "XXXXXXX";                  //X代表自定义
    sensor.maxDelay = PICK_UP_MAXDELAY;
    sensor.flags = SENSOR_FLAG_ON_CHANGE_MODE|SENSOR_FLAG_WAKE_UP;
    mSensorList.push_back(sensor);
#endif

2.定义宏开关

路径：
device/xiaomi/机型/ProjectConfig.mk

CUSTOM_KERNEL_PICK_UP_SENSOR = yes          //打开pickup的，这里因为将这个增加到上面的AUTO_ADD_GLOBAL_DEFINE_BY_NAME里面了，所以不需要在.mk中再定义了！
...
CUSTOM_KERNEL_WAKE_GESTURE_SENSOR = no          //关闭谷歌原生