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说明:
本案例使用E53_IA1(智慧农业模块)进行开发。目前已经适配好E53接口的底层驱动放在 device/st/drivers路径下面,感兴趣的读者可以去翻阅一下。另外，E53模组的底层驱动也已经可以直接调用。用户层可以通过获取驱动发布的服务使用模块。
下面将讲解E53_IA1的使用教程
确定目录结构。
在device\st\driver路径下新建E53_IA1文件夹，并创建驱动文件E53_IA1_hdf.c和编译构建文件BUILD.gn 。
.
└─ device
└─ st
└─ drivers
└─ e53_driver
└─ E53_IA1
│─ E53_IA1_hdf.c
│─ inc
└─ src
E53_IA1驱动实现
驱动实现包含驱动业务代码和驱动入口注册，在E53_IA1_hdf.c文件中添加以下代码：
#include <stdint.h>
#include <string.h>
#include "E53_IA1.h"
#include "E53_Common.h"
#include "hdf_device_desc.h"
#include "hdf_log.h"
#include "device_resource_if.h"
#include "osal_io.h"
#include "osal_mem.h"
#include "gpio_if.h"
#include "osal_time.h"
E53_IA1_Data_TypeDef E53_IA1_Data;
static uint8_t MotorStatus,LightStatus;
typedef enum {
E53_IA1_Start = 0,
E53_IA1_Stop,
E53_IA1_Read,
E53_IA1_SetMotor,
E53_IA1_SetLight,
}E53_IA1Ctrl;
int32_t E53_IA1DriverDispatch(struct HdfDeviceIoClient *client, int cmdCode, struct HdfSBuf *data, struct HdfSBuf *reply)
{
int ret;
char *replay_buf;
// char* read;
HDF_LOGE("E53 driver dispatch");
if (client == NULL || client->device == NULL)
{
HDF_LOGE("E53 driver device is NULL");
return HDF_ERR_INVALID_OBJECT;
}
switch (cmdCode)
{
case E53_IA1_Start:
ret = E53_IA1_Init();
if(ret != 0){
HDF_LOGE("E53 IA1 Init err");
return HDF_FAILURE;
}
ret = HdfSbufWriteString(reply, "E53 IA1 Init successful");
if(ret ==0){
HDF_LOGE("reply failed");
return HDF_FAILURE;
}
break;
case E53_IA1_Stop:
ret = E53_IA1_DeInit();
if(ret != 0){
HDF_LOGE("E53 IA1 Init err");
return HDF_FAILURE;
}
ret = HdfSbufWriteString(reply, "E53 IA1 Deinit successful");
if(ret ==0){
HDF_LOGE("reply failed");
return HDF_FAILURE;
}
break;
/* 接收到用户态发来的LED_WRITE_READ命令 */
case E53_IA1_Read:
ret = E53_IA1_Read_Data();
if(ret != 0){
HDF_LOGE("E53 IA1 Read Data err");
return HDF_FAILURE;
}
replay_buf = OsalMemAlloc(100);
(void)memset_s(replay_buf, 100, 0, 100);
sprintf(replay_buf,"{\"Temp\":%.2f,\"Hum\":%.2f,\"Lux\":%.2f,\"Motor\":\"%s\",\"LED\":\"%s\"}",\
E53_IA1_Data.Temperature, \
E53_IA1_Data.Humidity, \
E53_IA1_Data.Lux, \
MotorStatus ? "ON" : "OFF", \
LightStatus ? "ON" : "OFF");
/* 把传感器数据写入reply, 可被带至用户程序 */
if (!HdfSbufWriteString(reply, replay_buf))
{
HDF_LOGE("replay is fail");
return HDF_FAILURE;
}
OsalMemFree(replay_buf);
break;
case E53_IA1_SetMotor:
const char* read = HdfSbufReadString(data);
if(strcmp(read,"ON") == 0){
ret = Motor_StatusSet(ON);
if(ret != 0){
HDF_LOGE("gpioSet E53_IA1 motor gpio err");
return HDF_FAILURE;
}
MotorStatus = 1;
}else if(strcmp(read,"OFF") == 0){
ret = Motor_StatusSet(OFF);
if(ret != 0){
HDF_LOGE("gpioSet E53_IA1 motor gpio err");
return HDF_FAILURE;
}
MotorStatus = 0;
}else{
HDF_LOGE("Command wrong!");
return HDF_FAILURE;
}
replay_buf = OsalMemAlloc(100);
(void)memset_s(replay_buf, 100, 0, 100);
sprintf(replay_buf,"{\"Temp\":%.2f,\"Hum\":%.2f,\"Lux\":%.2f,\"Motor\":\"%s\",\"LED\":\"%s\"}",\
E53_IA1_Data.Temperature, \
E53_IA1_Data.Humidity, \
E53_IA1_Data.Lux, \
MotorStatus ? "ON" : "OFF", \
LightStatus ? "ON" : "OFF");
/* 把传感器数据写入reply, 可被带至用户程序 */
if (!HdfSbufWriteString(reply, replay_buf))
{
HDF_LOGE("replay is fail");
return HDF_FAILURE;
}
OsalMemFree(replay_buf);
break;
case E53_IA1_SetLight:
const char* readdata = HdfSbufReadString(data);
if(strcmp(readdata,"ON") == 0){
ret = Light_StatusSet(ON);
if(ret != 0){
HDF_LOGE("gpioSet E53_IA1 light gpio err");
return HDF_FAILURE;
}
LightStatus = 1;
}else if(strcmp(readdata,"OFF") == 0){
ret = Light_StatusSet(OFF);
if(ret != 0){
HDF_LOGE("gpioSet E53_IA1 light gpio err");
return HDF_FAILURE;
}
LightStatus = 0;
}else{
HDF_LOGE("Command wrong!");
return HDF_FAILURE;
}
replay_buf = OsalMemAlloc(100);
(void)memset_s(replay_buf, 100, 0, 100);
sprintf(replay_buf,"{\"Temp\":%.2f,\"Hum\":%.2f,\"Lux\":%.2f,\"Motor\":\"%s\",\"LED\":\"%s\"}",\
E53_IA1_Data.Temperature, \
E53_IA1_Data.Humidity, \
E53_IA1_Data.Lux, \
MotorStatus ? "ON" : "OFF", \
LightStatus ? "ON" : "OFF");
/* 把传感器数据写入reply, 可被带至用户程序 */
if (!HdfSbufWriteString(reply, replay_buf))
{
HDF_LOGE("replay is fail");
return HDF_FAILURE;
}
OsalMemFree(replay_buf);
break;
default:
return HDF_FAILURE;
}
return HDF_SUCCESS;
}
//驱动对外提供的服务能力，将相关的服务接口绑定到HDF框架
static int32_t Hdf_E53_IA1_DriverBind(struct HdfDeviceObject *deviceObject)
{
if (deviceObject == NULL)
{
HDF_LOGE("e53 driver bind failed!");
return HDF_ERR_INVALID_OBJECT;
}
static struct IDeviceIoService e53Driver = {
.Dispatch = E53_IA1DriverDispatch,
};
deviceObject->service = (struct IDeviceIoService *)(&e53Driver);
HDF_LOGD("E53 driver bind success");
return HDF_SUCCESS;
}
static int32_t Hdf_E53_IA1_DriverInit(struct HdfDeviceObject *device)
{
return HDF_SUCCESS;
}
// 驱动资源释放的接口
void Hdf_E53_IA1_DriverRelease(struct HdfDeviceObject *deviceObject)
{
if (deviceObject == NULL)
{
HDF_LOGE("Led driver release failed!");
return;
}
HDF_LOGD("Led driver release success");
return;
}
// 定义驱动入口的对象，必须为HdfDriverEntry（在hdf_device_desc.h中定义）类型的全局变量
struct HdfDriverEntry g_E53_IA1DriverEntry = {
.moduleVersion = 1,
.moduleName = "HDF_E53_IA1",
.Bind = Hdf_E53_IA1_DriverBind,
.Init = Hdf_E53_IA1_DriverInit,
.Release = Hdf_E53_IA1_DriverRelease,
};
// 调用HDF_INIT将驱动入口注册到HDF框架中
HDF_INIT(g_E53_IA1DriverEntry);
驱动编译
在driver/BUILD.gn文件中添加以下代码，将E53_IA1_hdf.c编译成hdf_E53_adapter。 添加的部分在 ##start## 和 ##end##* 之间，（"##start##"和"##end##"仅用来标识位置，添加完配置后删除这两行）
import("//drivers/adapter/khdf/liteos/hdf.gni")
hdf_driver("hdf_E53_adapter") {
sources = [
##start##
"E53_IA1/src/E53_IA1.c",
##end##
"E53_SF1/src/E53_SF1.c",
"E53_SC1/src/E53_SC1.c",
"E53_SC2/src/E53_SC2.c",
"E53_IS1/src/E53_IS1.c",
##start##
"E53_IA1/E53_IA1_hdf.c",
##end##
"E53_SF1/E53_SF1_hdf.c",
"E53_SC1/E53_SC1_hdf.c",
"E53_SC2/E53_SC2_hdf.c",
"E53_IS1/E53_IS1_hdf.c",
]
sources += [
]
include_dirs = [
"adapter/inc/",
"E53_Common/inc/",
##start##
"E53_IA1/inc/",
##end##
]
deps = [
"E53_Common:E53_Common",
]
}
驱动配置
驱动设备描述
HDF框架加载驱动所需要的信息来源于HDF框架定义的驱动设备描述，因此基于HDF框架开发的驱动必须要在HDF框架定义的device_info.hcs配置文件中添加对应的设备描述，所以我们需要在device\st\bearpi_hm_micro\liteos_a\hdf_config\device_info\device_info.hcs中添加E53_IA1设备描述。 "##start##"和"##end##"之间为新增配置（"##start##"和"##end##"仅用来标识位置，添加完配置后删除这两行）
device_adc :: device {
device0 :: deviceNode {
policy = 0;
priority = 50;
permission = 0644;
moduleName = "HDF_PLATFORM_ADC_MANAGER";
serviceName = "HDF_PLATFORM_ADC_MANAGER";
}
device1 :: deviceNode {
policy = 0;
priority = 55;
permission = 0644;
moduleName = "stm32mp157_adc_driver";
deviceMatchAttr = "st_stm32mp157_adc";
}
}
##start##
device_e53 :: device {
priority = 30;
device_ia1 :: deviceNode {
policy = 2;
priority = 130;
preload = 1;
permission = 0777;
moduleName = "HDF_E53_IA1";
serviceName = "hdf_e53_ia1";
}
}
##end##
添加控制E53_IA1的JS API接口
修改foundation\ace\ace_engine_lite\frameworks\src\core\modules\app_module.h，加入E53IA1Service JS API,（"##start##"和"##end##"仅用来标识位置，添加完配置后删除这两行）
public:
ACE_DISALLOW_COPY_AND_MOVE(AppModule);
AppModule() = default;
~AppModule() = default;
static JSIValue GetInfo(const JSIValue thisVal, const JSIValue *args, uint8_t argsNum);
static JSIValue Terminate(const JSIValue thisVal, const JSIValue *args, uint8_t argsNum);
##start##
static JSIValue E53IA1Service(const JSIValue thisVal, const JSIValue* args, uint8_t argsNum);
##end##
#ifdef FEATURE_SCREEN_ON_VISIBLE
static JSIValue ScreenOnVisible(const JSIValue thisVal, const JSIValue *args, uint8_t argsNum);
#endif
void InitAppModule(JSIValue exports)
{
JSI::SetModuleAPI(exports, "getInfo", AppModule::GetInfo);
JSI::SetModuleAPI(exports, "terminate", AppModule::Terminate);
##start##
JSI::SetModuleAPI(exports, "e53ia1service", AppModule::E53IA1Service);
##end##
#ifdef FEATURE_SCREEN_ON_VISIBLE
JSI::SetModuleAPI(exports, "screenOnVisible", AppModule::ScreenOnVisible);
#endif
}
编写控制E53_IA1的c++ 业务代码
在foundation\ace\ace_engine_lite\frameworks\src\core\modules\app_module.cpp中加入控制E53_IA1的c++ 业务代码（"##start##"和"##end##"仅用来标识位置，添加完配置后删除这两行）。
#include "app_module.h"
#include "ace_log.h"
#include "js_app_context.h"
#ifdef FEATURE_SCREEN_ON_VISIBLE
#include "js_async_work.h"
#include "product_adapter.h"
#endif
##start##
#include "hdf_sbuf.h"
#include "hdf_io_service_if.h"
#define E53_IA1_SERVICE "hdf_e53_ia1"
##end##
namespace OHOS {
namespace ACELite {
const char * const AppModule::FILE_MANIFEST = "manifest.json";
const char * const AppModule::KEY_APP_NAME = "appName";
const char * const AppModule::KEY_VERSION_NAME = "versionName";
const char * const AppModule::KEY_VERSION_CODE = "versionCode";
struct AsyncParams : public MemoryHeap {
ACE_DISALLOW_COPY_AND_MOVE(AsyncParams);
AsyncParams() : result(nullptr), callback(nullptr), context(nullptr) {}
JSIValue result;
JSIValue callback;
JSIValue context;
};
#endif
##start##
static int E53IA1Control(struct HdfIoService *serv, int32_t cmd, const char* buf, char **val)
{
int ret = HDF_FAILURE;
struct HdfSBuf *data = HdfSBufObtainDefaultSize();
struct HdfSBuf *reply = HdfSBufObtainDefaultSize();
if (data == NULL || reply == NULL) {
HILOG_ERROR(HILOG_MODULE_ACE,"fail to obtain sbuf data\n");
return ret;
}
if (!HdfSbufWriteString(data, buf))
{
HILOG_ERROR(HILOG_MODULE_ACE,"fail to write sbuf\n");
HdfSBufRecycle(data);
HdfSBufRecycle(reply);
return ret;
}
ret = serv->dispatcher->Dispatch(&serv->object, cmd, data, reply);
if (ret != HDF_SUCCESS)
{
HILOG_ERROR(HILOG_MODULE_ACE,"fail to send service call\n");
HdfSBufRecycle(data);
HdfSBufRecycle(reply);
return ret;
}
*val = (char *)(HdfSbufReadString(reply));
if(val ==NULL){
HILOG_ERROR(HILOG_MODULE_ACE,"fail to get service call reply\n");
ret = HDF_ERR_INVALID_OBJECT;
HdfSBufRecycle(data);
HdfSBufRecycle(reply);
return ret;
}
HILOG_ERROR(HILOG_MODULE_ACE,"Get reply is: %s\n", *val);
HdfSBufRecycle(data);
HdfSBufRecycle(reply);
return ret;
}
JSIValue AppModule::E53IA1Service(const JSIValue thisVal, const JSIValue *args, uint8_t argsNum)
{
struct HdfIoService *serv = HdfIoServiceBind(E53_IA1_SERVICE);
if (serv == NULL)
{
HILOG_ERROR(HILOG_MODULE_ACE,"fail to get service %s\n", E53_IA1_SERVICE);
return JSI::CreateUndefined();
}
if ((args == nullptr) || (argsNum == 0) || (JSI::ValueIsUndefined(args[0]))) {
return JSI::CreateUndefined();
}
JSIValue success = JSI::GetNamedProperty(args[0], CB_SUCCESS);
JSIValue fail = JSI::GetNamedProperty(args[0], CB_FAIL);
JSIValue complete = JSI::GetNamedProperty(args[0], CB_COMPLETE);
int32_t cmd = (int32_t)JSI::GetNumberProperty(args[0], "cmd");
char *data = (char *)JSI::GetStringProperty(args[0], "data");
HILOG_ERROR(HILOG_MODULE_ACE, "cmd is: %d\n", cmd);
HILOG_ERROR(HILOG_MODULE_ACE,"data is: %s\n", data);
char *replyData;
if (E53IA1Control(serv, cmd, data, &replyData))
{
HILOG_ERROR(HILOG_MODULE_ACE,"fail to send event\n");
JSI::CallFunction(fail, thisVal, nullptr, 0);
JSI::CallFunction(complete, thisVal, nullptr, 0);
JSI::ReleaseValueList(success, fail, complete);
return JSI::CreateUndefined();
}
JSIValue result = JSI::CreateObject();
JSI::SetStringProperty(result, "e53_ia1", replyData);
JSIValue argv[ARGC_ONE] = {result};
JSI::CallFunction(success, thisVal, argv, ARGC_ONE);
JSI::CallFunction(complete, thisVal, nullptr, 0);
JSI::ReleaseValueList(success, fail, complete, result);
HdfIoServiceRecycle(serv);
return JSI::CreateUndefined();
}
##end##
JSIValue AppModule::GetInfo(const JSIValue thisVal, const JSIValue *args, uint8_t argsNum)
{
JSIValue result = JSI::CreateUndefined();
cJSON *manifest = ReadManifest();
if (manifest == nullptr) {
HILOG_ERROR(HILOG_MODULE_ACE, "Fail to get the content of manifest.");
return result;
}
cJSON *appName = cJSON_GetObjectItem(manifest, KEY_APP_NAME);
cJSON *versionName = cJSON_GetObjectItem(manifest, KEY_VERSION_NAME);
cJSON *versionCode = cJSON_GetObjectItem(manifest, KEY_VERSION_CODE);
result = JSI::CreateObject();
if (appName != nullptr && appName->type == cJSON_String) {
JSI::SetStringProperty(result, KEY_APP_NAME, appName->valuestring);
}
if (versionName != nullptr && versionName->type == cJSON_String) {
JSI::SetStringProperty(result, KEY_VERSION_NAME, versionName->valuestring);
}
if (versionCode != nullptr && versionCode->type == cJSON_Number) {
JSI::SetNumberProperty(result, KEY_VERSION_CODE, versionCode->valuedouble);
}
cJSON_Delete(manifest);
manifest = nullptr;
return result;
}
配置HDF头文件路径
在foundation\ace\ace_engine_lite\ace_lite.gni中添加HDF头文件路径。
ace_lite_include_dirs += [
"//drivers/framework/ability/sbuf/include",
"//drivers/framework/include/core",
"//drivers/framework/include/utils",
"//drivers/adapter/uhdf/posix/include",
]
添加编译依赖
修改foundation\ace\ace_engine_lite\frameworks\BUILD.gn，在public_deps中添加以下代码
"//drivers/adapter/uhdf/manager:hdf_core",
修改foundation\ace\ace_engine_lite\test\ace_test_config.gni，在extra_deps中添加以下代码
"//drivers/adapter/uhdf/manager:hdf_core",
烧录：
参考编译烧录
安装Hap应用： 参考安装HAP应用教程安装applications/BearPi/BearPi-HM_Micro/tools/hap_tools/hap_example目录下的Micro_E53.hap应用进行测试,源码请参考Micro_E53 JS 应用源码。
运行结果 点击屏幕图标可以对E53_IA1进行控制。
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