Openharmony 添加內核驅動(L1)
作者：拓維信息_青松
此文章以openharmony 3.1代碼基礎，介紹liteos-a ipcamera_hispark_taurus上添加khdf步驟。
簡介
此文章以openharmony 3.1代碼基礎
- 介紹liteos-a ipcamera_hispark_taurus上添加khdf步驟。
- 介紹驅動的簡單調用(3516開發板：HiSpark_AI_Hi3516D_One_Light_VER.B開發板上測試。
驅動添加
驅動目錄結構
驅動代碼見附件。
驅動目錄以外的文件配置
文件drivers\adapter\khdf\liteos\hdf_lite.mk。
# my sample test
ifeq ($(LOSCFG_DRIVERS_HDF_MY_SAMPLE_DRIVER), y)
LITEOS_BASELIB += -lmy_sample_driver
LIB_SUBDIRS += $(LITEOS_DRIVERS_HDF)/my_sample_driver
endif
文件drivers\adapter\khdf\liteos\Kconfig。
source "../../drivers/adapter/khdf/liteos/my_sample_driver/Kconfig"
文件drivers\adapter\khdf\liteos\BUILD.gn。
文件vendor\hisilicon\hispark_taurus\hdf_config\device_info\device_info.hcs。
my_sample :: host {
hostName = "my_sample_host";
device_mysample :: device {
device0 :: deviceNode { // DeviceNode of the sample driver
policy = 2; // Driver service release policy. For details, see section Driver Service Management.
priority= 10; // Driver startup priority (0-200). A larger value indicates a lower priority. The default value 100 is recommended. If the priorities are the same, the device loading sequence is random.
preload = 0; // On-demand loading of the driver. For details, see "NOTE" at the end of this section.
permission = 0664; // Permission for the driver to create device nodes.
moduleName = "my_sample_driver"; // Driver name. The value of this field must be the same as the value of moduleName in the driver entry structure.
serviceName = "my_sample_service"; // Name of the service released by the driver. The name must be unique.
}
}
}
驅動編譯配置
從代碼根目錄切換到kernel/liteos_a/。
cd kernel/liteos_a/
執行make menuconfig。
選擇driver。
選擇framework support。
選擇my_sample driver。
按q，保存退出。
驅動調用可執行程序
目錄結構
驅動調用代碼。
驅動調用可執行程序詳細代碼見附件。
代碼目錄結構之外的文件配置
文件build\lite\components\myapp.json。
{
"components": [
{
"component": "myapp",
"description": "my app",
"optional": "false",
"dirs": [
"myapp"
],
"targets": [
"http://myapp:myapp"
],
"rom": "",
"ram": "",
"output": [
],
"adapted_kernel": [
"liteos_a",
"liteos_m"
],
"features": [],
"deps": {
"third_party": [
"bounds_checking_function"
],
"components": []
}
}
]
}文件vendor\hisilicon\hispark_taurus\config.json。
{
"subsystem": "myapp",
"components": [
{ "component": "myapp", "features":[] }
]
}
編譯
編譯環境參考：??3516應用調用到驅動實踐??。
執行下面2條命令。
hb set
.
執行hb build -f。
燒錄測試
燒錄步驟參考：??3516應用調用到驅動實踐??。
切換到/bin目錄下執行：./my_sample_driver_test。
結果如圖：
??官網文檔??
責任編輯：jianghua
來源：
鴻蒙社區
