OpenHarmony设备开发 轻量带屏解决方案之恒玄芯片移植案例

device
└── <device_company>
    └── <device_name>
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device
├── board                                --- 单板厂商目录
│   └── fnlink                           --- 单板厂商名字：欧智通
│       └── v200zr                       --- 单板名：v200zr
└── soc									 --- SoC厂商目录
    └── bestechnic                       --- SoC厂商名字：恒玄
        └── bes2600						 --- SoC Series名：bes2600是一个系列，里面包含bes2600w等SoC名
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vendor
└── bestechnic							 --- 开发产品样例厂商目录，恒玄开发的带屏样例，因此以bestechnic命名
    └── display_demo         			 --- 产品名字：以智能开关面板的带屏显示样例
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{
  "product_name": "display_demo",       --- 用于hb set进行选择时，显示的产品名称
  "type": "mini",                       --- 构建系统的类型，mini/small/standard
  "version": "3.0",                     --- 构建系统的版本，1.0/2.0/3.0
  "device_company": "fnlink",           --- 单板厂商名，用于编译时找到/device/board/fnlink目录
  "board": "v200zr",                    --- 单板名，用于编译时找到/device/board/fnlink/v200zr目录
  "kernel_type": "liteos_m",            --- 内核类型，因为OpenHarmony支持多内核，一块单板可能适配了多个内核，所以需要指定某个内核进行编译
  "kernel_version": "3.0.0",            --- 内核版本，一块单板可能适配了多个linux内核版本，所以需要指定某个具体的内核版本进行编译
  "subsystems": [ ]                     --- 选择所需要编译构建的子系统
}
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# Kernel type, e.g. "linux", "liteos_a", "liteos_m".
kernel_type = "liteos_m"                --- 内核类型，跟config.json中kernel_type对应

# Kernel version.
kernel_version = "3.0.0"                --- 内核版本，跟config.json中kernel_version对应
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 	通过`hb env`可以查看选择出来的预编译环境变量。
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$(foreach line,$(shell hb env | sed 's/\[OHOS INFO\]/ohos/g;s/ /_/g;s/:_/=/g' || true),$(eval $(line)))
ifneq ($(ohos_kernel),liteos_m)
$(error The selected product ($(ohos_product)) is not a liteos_m kernel type product)
endif
--- 将hb env的每一行输出转化为变量形式，例如将[OHOS INFO] device company: fnlink转换为ohos_device_company=fnlink

……

ifeq ($(BOARD_COMPANY),)
BOARD_COMPANY:=$(ohos_device_company)
endif
……
export BOARD_COMPANY
--- 将ohos_device_company转化为BOARD_COMPANY环境变量
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config SOC_COMPANY
    string "SoC company name to locate soc build path"
    help
      This option specifies the SoC company name, used to locate the build path for soc. This option is set by the
      SoC's Kconfig file, and should be exactly the same with SoC company path, and the user should generally avoid
       modifying it via the menu configuration.

orsource "../../device/board/*/Kconfig.liteos_m.shields"                                 --- 将所有扩展板配置信息加载进来，因为单板厂商A提供扩展板可以给单板厂商B使用，所以这里使用*匹配所有的扩展板，而非BOARD_COMPANY。另外由于OpenHarmony支持多内核设计，Kconfig文件采用liteos_m作为后缀，在进行单板适配过程中，其他内核在适配过程中，可以使用对应的内核名作为后缀名进行扩展。

orsource "../../device/board/$(BOARD_COMPANY)/Kconfig.liteos_m.defconfig.boards"         --- 加载BOARD_COMPANY的所有单板预定义配置

choice
    prompt "Board Selection"

orsource "../../device/board/$(BOARD_COMPANY)/Kconfig.liteos_m.boards"                   --- 提供Board选择列表

endchoice

orsource "../../device/soc/*/Kconfig.liteos_m.defconfig"                                 --- 加载所有SoC的默认配置定义

choice
    prompt "SoC Series Selection"

orsource "../../device/soc/*/Kconfig.liteos_m.series"                                    --- 提供所有SoC Series选择列表

endchoice

orsource "../../device/soc/*/Kconfig.liteos_m.soc"                                       --- 加载所有SoC配置
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.
├── v200zr                                       --- v200zr单板配置目录
│   ├── Kconfig.liteos_m.board                   --- 提供v200zr单板的配置选项
│   ├── Kconfig.liteos_m.defconfig.board         --- 提供v200zr单板的默认配置项
│   └── liteos_m
│       └── config.gni
├── Kconfig.liteos_m.boards                      --- 提供fnlink单板厂商下Boards配置信息
├── Kconfig.liteos_m.defconfig.boards			 --- 提供fnlink单板厂商下Boards默认配置信息
├── Kconfig.liteos_m.shields					 --- 提供fnlink单板厂商下扩展板配置信息
└── shields										 --- fnlink单板厂商的扩展板目录
    ├── v200zr-t0								 --- fnlink单板厂商的扩展板v200zr-t0
    │   ├── Kconfig.liteos_m.defconfig.shield	 --- 扩展板v200zr-t0默认配置
    │   └── Kconfig.liteos_m.shield				 --- 扩展板v200zr-t0配置信息
    ├── v200zr-t1
    │   ├── Kconfig.liteos_m.defconfig.shield
    │   └── Kconfig.liteos_m.shield
    └── Kconfig.liteos_m.shields
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config BOARD_v200zr
    bool "select board v200zr"
    depends on SOC_BES2600W		 --- v200zr单板用的bes2600w的SoC，只有 bes2600w的SoC被选择后，v200zr单板配置选项才可见，可以被选择。
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if BOARD_v200zr
config BOARD
    string		 --- string后没有带提示，因此用户不可见
    default "v200zr"

endif # BOARD_v200zr
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.
├── bes2600									 --- bes2600 SoC系列
│   ├── Kconfig.liteos_m.defconfig.bes2600w	 --- bestechnic芯片厂商bes2600w SoC Series配置
│   ├── Kconfig.liteos_m.defconfig.series	 --- bestechnic芯片厂商bes2600默认配置
│   ├── Kconfig.liteos_m.series				 --- bestechnic芯片厂商bes2600 SoC Series配置
│   └── Kconfig.liteos_m.soc				 --- bestechnic芯片厂商bes2600 SoC配置
├── Kconfig.liteos_m.defconfig				 --- bestechnic芯片厂商SoC默认配置
├── Kconfig.liteos_m.series					 --- bestechnic芯片厂商SoC Series配置
└── Kconfig.liteos_m.soc					 --- bestechnic芯片厂商 SoC配置
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config SOC_SERIES_BES2600			 --- 提供bes2600 SoC Series选项
    bool "Bestechnic 2600 Series"
    select ARM						 --- 选择bes2600后，默认选择ARM架构
    select SOC_COMPANY_BESTECHNIC    --- 选择bes2600后，默认选择bestechnic芯片公司，驱动会依赖这个宏配置，选择配置编译对应厂商的驱动
    select CPU_CORTEX_M33			 --- 选择bes2600后，默认选择cortex-m33 CPU
    help
        Enable support for Bestechnic 2600 series
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choice
    prompt "Bestechnic 2600 series SoC"
    depends on SOC_SERIES_BES2600	 --- 只有选择了bes2600 Series后，才会出现如下配置选项

config SOC_BES2600W					 --- 增加bes2600w SoC配置选择项
    bool "SoC BES2600w"

endchoice
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if SOC_SERIES_BES2600							 --- 选择了bes2600 Series后，才会增加如下默认配置选项

rsource "Kconfig.liteos_m.defconfig.bes2600w"	 --- 增加bes2600w SoC的默认配置

config SOC_SERIES								 --- 增加SOC_SERIES的默认配置
    string
    default "bes2600"

endif
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ifeq ($(TEE:1=y),y)
tee = _tee
endif
ifeq ($(RELEASE:1=y),y)
CONFIG ?= $(PRODUCT_PATH)/kernel_configs/release$(tee).config
else
CONFIG ?= $(PRODUCT_PATH)/kernel_configs/debug$(tee).config		 --- 配置文件保存在$(CONFIG)中，由产品最终定义
endif

……

update_config menuconfig:
	$(HIDE)test -f "$(CONFIG)" && cp -v "$(CONFIG)" .config && menuconfig $(args) && savedefconfig --out "$(CONFIG)"
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.
└── display_demo
    ├── config.json
    └── kernel_configs
        └── debug.config
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deps += [ "//device/board/$device_company" ]
deps += [ "//device/soc/$LOSCFG_SOC_COMPANY" ]
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if (ohos_kernel_type == "liteos_m") {                    --- 由于多内核设计，对于LiteOS-M内核适配，需要用宏来隔离
  import("//kernel/liteos_m/liteos.gni")				 --- 引入内核gn编写模板
  module_name = get_path_info(rebase_path("."), "name")	 --- 动态获取当前文件目录作为模块名，防止目录名修改后，这里还需要跟着修改
  module_group(module_name) {							 --- 采用module_group模板
    modules = [											 --- 添加需要编译的模块
    ]
  }
}
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...
    if(!ret) {
        ...
        OhosSystemAdapterHooks();    --- 系统启动时候设置钩子，启动OpenHarmonyOHOS_SystemInit的之前完成打印和驱动的初始化
        ...
        OHOS_SystemInit(); 			 --- 启动OpenHarmony服务，以及组件初始化
    }
....
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int OhosSystemAdapterHooks(void)
{
    init_trace_system(); 	 --- 初始化打印函数
    DeviceManagerStart(); 	 --- 调用DeviceManagerStart函数进行HDF驱动初始化，这个过程会调用单板代码中的驱动配置文件hdf.hcs以及drivers源码实现
    return 0;
}
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static int32_t FsDriverInit(struct HdfDeviceObject *object)
{
    if (object == NULL) {
        return HDF_FAILURE;
    }
    if (object->property) {
        if (FsGetResource(fs, object->property) != HDF_SUCCESS) {
            HDF_LOGE("%s: FsGetResource failed", __func__);
            return HDF_FAILURE;
        }
    }
    for (int i = 0; i < sizeof(fs) / sizeof(fs[0]); i++) {
        if (fs[i].mount_point == NULL)
            continue;

        fs[i].lfs_cfg.read = littlefs_block_read;
        fs[i].lfs_cfg.prog = littlefs_block_write;
        fs[i].lfs_cfg.erase = littlefs_block_erase;
        fs[i].lfs_cfg.sync = littlefs_block_sync;

        fs[i].lfs_cfg.read_size = 256;
        fs[i].lfs_cfg.prog_size = 256;
        fs[i].lfs_cfg.cache_size = 256;
        fs[i].lfs_cfg.lookahead_size = 16;
        fs[i].lfs_cfg.block_cycles = 1000;

        int ret = mount(NULL, fs[i].mount_point, "littlefs", 0, &fs[i].lfs_cfg);
        HDF_LOGI("%s: mount fs on '%s' %s\n", __func__, fs[i].mount_point, (ret == 0) ? "succeed" : "failed");
    }
    return HDF_SUCCESS;
}
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board_ld_flags += [
     "-Wl,--wrap=_malloc_r",
     "-Wl,--wrap=_realloc_r",
     "-Wl,--wrap=_reallocf_r",
     "-Wl,--wrap=_free_r",
     "-Wl,--wrap=_memalign_r",
     "-Wl,--wrap=_malloc_usable_size_r",
]
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board_ld_flags += [
     "-Wl,--wrap=printf",
     "-Wl,--wrap=sprintf",
     "-Wl,--wrap=snprintf",
     "-Wl,--wrap=vsnprintf",
     "-Wl,--wrap=vprintf",
]
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……
ssize_t _read(int fd, void *buf, size_t nbyte)
{
    return LOS_Read(fd, buf, nbyte);
}

ssize_t _write(int fd, const void *buf, size_t nbyte)
{
    return LOS_Write(fd, buf, nbyte);
}

off_t _lseek(int fd, off_t offset, int whence)
{
    return LOS_Lseek(fd, offset, whence);
}
……
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module_switch = defined(LOSCFG_DRIVERS_HDF_PLATFORM_GPIO)	 --- 如果打开HDF的GPIO配置开关，才进行如下编译
module_name = get_path_info(rebase_path("."), "name")

hdf_driver(module_name) {
  sources = []
  if (defined(LOSCFG_SOC_COMPANY_BESTECHNIC)) {				 --- 如果打开恒玄的芯片配置开关，才进行恒玄GPIO的驱动编译
    sources += [ "gpio_bes.c" ]
  }

  include_dirs = [ "." ]
}
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struct HdfDriverEntry g_GpioDriverEntry = {
    .moduleVersion = 1,
    .moduleName = "BES_GPIO_MODULE_HDF",
    .Bind = GpioDriverBind,
    .Init = GpioDriverInit,
    .Release = GpioDriverRelease,
};
HDF_INIT(g_GpioDriverEntry); 	 --- 通过HDF_INIT 加载GPIO驱动
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static int32_t GpioDriverInit(struct HdfDeviceObject *device)
{
    int32_t ret;
    struct GpioCntlr *gpioCntlr = NULL;

    if (device == NULL) {
        HDF_LOGE("%s: device is NULL", __func__);
        return HDF_ERR_INVALID_PARAM;
    }

    gpioCntlr = GpioCntlrFromDevice(device); 	 --- gpioCntlr节点变量就可以获取具体gpio配置
    if (gpioCntlr == NULL) {
      ...
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module_name = get_path_info(rebase_path("."), "name")
hdf_driver(module_name) {
  sources = [
    "zzw395.c",
  ]
  include_dirs = [
    "//drivers/peripheral/display/interfaces/include",
  ...
  ]
}
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static struct HdfDriverEntry g_ZZW395DriverEntry = {
    .moduleVersion = 1,
    .moduleName = "HDF_PANEL_ZZW395",
    .Bind = PanelDriverBind,
    .Init = PanelDriverInit,
    .Release = PanelDriverRelease,
};

HDF_INIT(g_ZZW395DriverEntry);
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static int32_t PanelDriverInit(struct HdfDeviceObject *object)
{
    if (object == NULL) {
        return HDF_FAILURE;
    }
    HDF_LOGD("%s entry !!!", __func__);
    if (object->property) {
        if (PanelGetResource(&priv, object->property) != HDF_SUCCESS) {
            HDF_LOGE("%s: PanelGetResource failed", __func__);
            return HDF_FAILURE;
        }
    }
...
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config("include") {
  include_dirs = [ "interfaces/wifiservice" ]	 --- 因为wifi_lite只提供头文件，不提供wifi的具体实现，所以wifi模块暴露出适配的目录路径提供给硬件厂商来适配，厂商提供wifi协议栈源码实现。
}

group("wifi") {
  public_configs = [ ":include" ]
}
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……
WifiErrorCode Scan(void)	 --- wifi_device.c中扫描wifi热点的函数，对wifi_device.h中Scan函数的适配实现
{
    WifiErrorCode ret = ERROR_WIFI_BUSY;


    if (IsWifiActive() != WIFI_STA_ACTIVE)
        return ERROR_WIFI_IFACE_INVALID;

    if (g_HalHmosWifiInfo.scan_state == SCAN_REQUEST ||
        g_HalHmosWifiInfo.scan_state == SCAN_TRIGGER)
        return ERROR_WIFI_BUSY;

    HalHmosWifiLock();
    ret = ((HalHmosSendEvent(HMOS_ON_WIFI_SCAN_STATE_CHANGED, NULL) == 0) ? WIFI_SUCCESS : ERROR_WIFI_BUSY);
    HalHmosWifiUnLock();

    return ret;
}
……
int GetSignalLevel(int rssi, int band)	 --- wifi_hotspot.c中获取wifi信号热点函数，对wifi_hotspot.h中GetSignalLevel函数的适配实现。
{
    if (band == HOTSPOT_BAND_TYPE_2G) {
        if (rssi >= RSSI_LEVEL_4_2_G)
            return RSSI_LEVEL_4;
        if (rssi >= RSSI_LEVEL_3_2_G)
            return RSSI_LEVEL_3;
        if (rssi >= RSSI_LEVEL_2_2_G)
            return RSSI_LEVEL_2;
        if (rssi >= RSSI_LEVEL_1_2_G)
            return RSSI_LEVEL_1;
    }

    if (band == HOTSPOT_BAND_TYPE_5G) {
        if (rssi >= RSSI_LEVEL_4_5_G)
            return RSSI_LEVEL_4;
        if (rssi >= RSSI_LEVEL_3_5_G)
            return RSSI_LEVEL_3;
        if (rssi >= RSSI_LEVEL_2_5_G)
            return RSSI_LEVEL_2;
        if (rssi >= RSSI_LEVEL_1_5_G)
            return RSSI_LEVEL_1;
    }
    return ERROR_WIFI_INVALID_ARGS;
}
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import("//kernel/liteos_m/liteos.gni")
import("$LITEOSTHIRDPARTY/lwip/lwip.gni")
import("$LITEOSTOPDIR/components/net/lwip-2.1/lwip_porting.gni")

module_switch = defined(LOSCFG_NET_LWIP_SACK)
module_name = "lwip"
kernel_module(module_name) {
  sources = LWIP_PORTING_FILES + LWIPNOAPPSFILES -
            [ "$LWIPDIR/api/sockets.c" ] + [ "porting/src/ethernetif.c" ]		 --- 增加ethernetif.c文件，用以适配ethernet网卡的初始化适配
  defines = [ "LITEOS_LWIP=1" ]
  defines += [ "CHECKSUM_BY_HARDWARE=1" ]
}

config("public") {
  defines = [ "_BSD_SOURCE=1" ]
  include_dirs =
      [ "porting/include" ] + LWIP_PORTING_INCLUDE_DIRS + LWIP_INCLUDE_DIRS
}
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#ifndef _PORTING_LWIPOPTS_H_
#define _PORTING_LWIPOPTS_H_

#include_next "lwip/lwipopts.h"				 --- 保持原来的配置项不变

#define LWIP_NETIF_STATUS_CALLBACK      1
#define LWIP_CHECKSUM_ON_COPY           0
#define CHECKSUM_GEN_UDP                0	 --- 新增硬件适配选项

#endif /* _PORTING_LWIPOPTS_H_ */
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err_t
ethernetif_init(struct netif *netif)
{
……
#ifdef CHECKSUM_BY_HARDWARE
    eth_hw_checksum_init();
#endif
……
    netif->linkoutput = low_level_output;

    netif->drv_send = liteos_low_level_output;
    netif->hwaddr_len = NETIF_MAX_HWADDR_LEN;
    low_level_init(netif);
    driverif_init(netif);
    return ERR_OK;
……
}
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{
  "component": "dsoftbus",
  "features": [
    "softbus_adapter_config = \"//vendor/bestechnic/mini_distributed_music_player/dsoftbus_lite_config\""
  ]
},
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.
├── feature_config					--- 软总线功能特性配置，例如是否开启自发现功能等
│   └── mini
│       └── config.gni
└── spec_config						--- 软总线规格特性配置，例如设置软总线日志级别设置
    ├── softbus_config_adapter.c
    ├── softbus_config_adapter.h
    └── softbus_config_type.h
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static void DSoftBus(void)
{
    osThreadAttr_t attr;
    attr.name = "dsoftbus task";
    attr.attr_bits = 0U;
    attr.cb_mem = NULL;
    attr.cb_size = 0U;
    attr.stack_mem = NULL;
    attr.stack_size = 65536;
    attr.priority = 24;

    extern void InitSoftBusServer(void);
    if (osThreadNew((osThreadFunc_t) InitSoftBusServer, NULL, &attr) == NULL) {
        printf("Failed to create WifiSTATask!\n");
    }
}

APP_FEATURE_INIT(DSoftBus);
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{
  "component": "rpc"
},
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static void RpcServerWifiDHCPSucCB(struct netif *netif, netif_nsc_reason_t reason,
                                   const netif_ext_callback_args_t *args)
{
    (void) args;
    if (netif == NULL) {
        printf("%s %d, error: input netif is NULL!\n", __FUNCTION__, __LINE__);
        return;
    }
    if (reason == LWIP_NSC_IPSTATUS_CHANGE) {
        if (netif_is_up(netif) && !ip_addr_isany(&netif->ip_addr)) {
            printf("%s %d, start rpc server!\n", __FUNCTION__, __LINE__);
            StartDBinderService();
        }
    }
}

static void WifiDHCPRpcServerCB(void)
{
    NETIF_DECLARE_EXT_CALLBACK(WifiReadyRpcServerCallback);
    netif_add_ext_callback(&WifiReadyRpcServerCallback, RpcServerWifiDHCPSucCB);
}

APP_FEATURE_INIT(WifiDHCPRpcServerCB);
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{
  "subsystem": "startup",
  "components": [
	{
	  "component": "bootstrap_lite"		 --- bootstrap_lite 部件
	},
	{
	  "component": "syspara_lite",		 --- syspara_lite 部件
	  "features": [
		"enable_ohos_startup_syspara_lite_use_posix_file_api = true"
	  ]
	}
  ]
},
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       __zinitcall_bsp_start = .;
      KEEP (*(.zinitcall.bsp0.init))
      KEEP (*(.zinitcall.bsp1.init))
      KEEP (*(.zinitcall.bsp2.init))
      KEEP (*(.zinitcall.bsp3.init))
      KEEP (*(.zinitcall.bsp4.init))
      __zinitcall_bsp_end = .;
      __zinitcall_device_start = .;
      KEEP (*(.zinitcall.device0.init))
      KEEP (*(.zinitcall.device1.init))
      KEEP (*(.zinitcall.device2.init))
      KEEP (*(.zinitcall.device3.init))
      KEEP (*(.zinitcall.device4.init))
      __zinitcall_device_end = .;
      __zinitcall_core_start = .;
      KEEP (*(.zinitcall.core0.init))
      KEEP (*(.zinitcall.core1.init))
      KEEP (*(.zinitcall.core2.init))
      KEEP (*(.zinitcall.core3.init))
      KEEP (*(.zinitcall.core4.init))
      __zinitcall_core_end = .;
      __zinitcall_sys_service_start = .;
      KEEP (*(.zinitcall.sys.service0.init))
      KEEP (*(.zinitcall.sys.service1.init))
      KEEP (*(.zinitcall.sys.service2.init))
      KEEP (*(.zinitcall.sys.service3.init))
      KEEP (*(.zinitcall.sys.service4.init))
      __zinitcall_sys_service_end = .;
      __zinitcall_sys_feature_start = .;
      KEEP (*(.zinitcall.sys.feature0.init))
      KEEP (*(.zinitcall.sys.feature1.init))
      KEEP (*(.zinitcall.sys.feature2.init))
      KEEP (*(.zinitcall.sys.feature3.init))
      KEEP (*(.zinitcall.sys.feature4.init))
      __zinitcall_sys_feature_end = .;
      __zinitcall_run_start = .;
      KEEP (*(.zinitcall.run0.init))
      KEEP (*(.zinitcall.run1.init))
      KEEP (*(.zinitcall.run2.init))
      KEEP (*(.zinitcall.run3.init))
      KEEP (*(.zinitcall.run4.init))
      __zinitcall_run_end = .;
      __zinitcall_app_service_start = .;
      KEEP (*(.zinitcall.app.service0.init))
      KEEP (*(.zinitcall.app.service1.init))
      KEEP (*(.zinitcall.app.service2.init))
      KEEP (*(.zinitcall.app.service3.init))
      KEEP (*(.zinitcall.app.service4.init))
      __zinitcall_app_service_end = .;
      __zinitcall_app_feature_start = .;
      KEEP (*(.zinitcall.app.feature0.init))
      KEEP (*(.zinitcall.app.feature1.init))
      KEEP (*(.zinitcall.app.feature2.init))
      KEEP (*(.zinitcall.app.feature3.init))
      KEEP (*(.zinitcall.app.feature4.init))
      __zinitcall_app_feature_end = .;
      __zinitcall_test_start = .;
      KEEP (*(.zinitcall.test0.init))
      KEEP (*(.zinitcall.test1.init))
      KEEP (*(.zinitcall.test2.init))
      KEEP (*(.zinitcall.test3.init))
      KEEP (*(.zinitcall.test4.init))
      __zinitcall_test_end = .;
      __zinitcall_exit_start = .;
      KEEP (*(.zinitcall.exit0.init))
      KEEP (*(.zinitcall.exit1.init))
      KEEP (*(.zinitcall.exit2.init))
      KEEP (*(.zinitcall.exit3.init))
      KEEP (*(.zinitcall.exit4.init))
      __zinitcall_exit_end = .;
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    {
      "subsystem": "startup",
      "components": [
        {
          "component": "bootstrap_lite"
        },
        ...
      ]
    },
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static void Init(void)
{
    static Bootstrap bootstrap;
    bootstrap.GetName = GetName;
    bootstrap.Initialize = Initialize;
    bootstrap.MessageHandle = MessageHandle;
    bootstrap.GetTaskConfig = GetTaskConfig;
    bootstrap.flag = FALSE;
    SAMGR_GetInstance()->RegisterService((Service *)&bootstrap);
}
SYS_SERVICE_INIT(Init);   --- 通过SYS启动即SYS_INIT启动就需要强制链接生成的lib
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static_library("bootstrap") {
  sources = [
    "bootstrap_service.c",
    "system_init.c",
  ]
  ....
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#define ETH_ALEN 6
#define MAC_BITS 4
#define MAC_HIGH_MASK 0xf0
#define MAC_LOW_MASK 0x0f
#define HEX_A 0xa
#define CHAR_NUM_OFFSET 0x30
#define CHAR_CAPITAL_OFFSET 0x37
#define STR_END_FLAG '\0'

typedef unsigned char               u8;

static char serialNumber[2*ETH_ALEN + 1];		 --- 最后一位留作'\0'结束符标识


static char Hex2Char(u8 hex)
{
    if (hex < HEX_A) {
        return hex + CHAR_NUM_OFFSET;			 --- 将数值0转为char的'0'
    } else {
        return hex + CHAR_CAPITAL_OFFSET;		 --- 将数值0xa转为char的'A'
    }
}

const char* HalGetSerial(void)
{
    char macAddr[ETH_ALEN];
    // as devboard has no production serial number, we just
    // use wifi mac address as device serial number.
    if (serialNumber[0] == STR_END_FLAG) {		 --- 只有第一次调用时，才去获取mac地址
        extern int bwifi_get_own_mac(u8 *addr);
        bwifi_get_own_mac(macAddr);				 --- 获取mac地址
        int j = 0;
        for (int i = 0; i < ETH_ALEN; i++) {
            u8 lowFour, highFour;
            highFour = (macAddr[i] & MAC_HIGH_MASK) >> MAC_BITS;
            serialNumber[j] = Hex2Char(highFour);
            j++;
            lowFour = macAddr[i] & MAC_LOW_MASK;
            serialNumber[j] = Hex2Char(lowFour);
            j++;
        }		 --- 将mac地址值转化为serial number
    }
    return serialNumber;
}
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{
  "subsystem": "hiviewdfx",
  "components": [
	{
	  "component": "hilog_lite",
	  "optional": "true"
	}
  ]
},
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boolean HilogProc_Impl(const HiLogContent *hilogContent, uint32 len)
{
    char tempOutStr[LOG_FMT_MAX_LEN] = {0};
    if (LogContentFmt(tempOutStr, sizeof(tempOutStr), hilogContent) > 0) {
        printf(tempOutStr);
    }
	return TRUE;   
}

HiviewRegisterHilogProc(HilogProc_Impl);
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{
  "subsystem": "systemabilitymgr",
  "components": [
	{
	  "component": "samgr_lite",
	  "features": [
		"config_ohos_systemabilitymgr_samgr_lite_shared_task_size = 4096"
	  ]
	}
  ]
},
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{
  "subsystem": "multimedia",
  "components": [
    {
      "component": "histreamer",
      "features": [
        "multimedia_histreamer_enable_plugin_hdi_adapter = true",
        "multimedia_histreamer_enable_plugin_minimp3_adapter = true",
        "multimedia_histreamer_enable_plugin_ffmpeg_adapter = false",
        "config_ohos_multimedia_histreamer_stack_size = 65536"
      ]
    }
  ]
},
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{
  "subsystem": "utils",
  "components": [
	{
	  "component": "kv_store",
	  "features": [
		"enable_ohos_utils_native_lite_kv_store_use_posix_kv_api = true"
	  ]
	},
	{
	  "component": "js_builtin"
	},
	{
	  "component": "timer_task"
	},
	{
	  "component": "kal_timer",
	}
  ]
},
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aafwk_lite + appexecfwk_lite    (AAFWK + APPEXECFWK)
      |
ace_engine_lite + jerryscript + i18n_lite + resmgr_lite + utils/native/lite/... (ACE,JS引擎及其依赖)
      |
graphic_ui + graphic_utils      (图形框架)
      |
giflib + libjpeg + libpng + qrcodegen + freetype... (图形第三方库)
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/* ui app entry */
void RunApp()
{
#ifdef UI_TEST
    AnimatorDemoStart(); 	 --- native ui demo
#elif defined(ABILITY_TEST)
    StartJSApp(); 			 --- js demo
#endif
}

void AppEntry(void)
{
    UiMain();
}

APP_FEATURE_INIT(AppEntry);
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{
  "subsystem": "ace",
  "components": [
    {
      "component": "ace_engine_lite",
      "features": [
        "enable_ohos_ace_engine_lite_product_config = true"
      ]
    }
  ]
},
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├── app.js
├── common
├── i18n
├── manifest.json
└── pages
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    {
      "subsystem": "aafwk",
      "components": [
        {
          "component": "aafwk_lite",
          "features": [
            "enable_ohos_appexecfwk_feature_ability = true",	 --- 支持FA特性，即包含图形能力
            "config_ohos_aafwk_ams_task_size = 4096"			 --- 配置aafwk栈的大小
          ]
        }
      ]
    },
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    {
      "subsystem": "appexecfwk",
      "components": [
        {
          "component": "appexecfwk_lite"
        }
      ]
    },
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{
  "subsystem": "xts",
  "components": [
    { "component": "xts_acts", "features":
      [
        "config_ohos_xts_acts_utils_lite_kv_store_data_path = \"/data\"",
        "enable_ohos_test_xts_acts_use_thirdparty_lwip = true"
      ]
    },
    { "component": "xts_tools", "features":[] }
  ]
}
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...
[16:53:43:438]../../../test/xts/acts/utils_lite/kv_store_hal/src/kvstore_func_test.c:793:testKvStoreMaxSize004:PASS
[16:53:43:438]+-------------------------------------------+
[16:53:43:438]
[16:53:43:438]-----------------------
[16:53:43:438]32 Tests 0 Failures 0 Ignored 
[16:53:43:438]OK
[16:53:43:439]All the test suites finished!
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