Native层读写nvram

[DESCRIPTION]
Native层中调用NVM_GetFileDesc读写nvram
[SOLUTION]
写nvram的流程：
1，NVM_GetFileDesc(file_lid, &rec_size, &rec_num,true);//读打开
2，read
3，NVM_CloseFileDesc
4，NVM_GetFileDesc(file_lid, &rec_size, &rec_num,false);//写打开
5，write
6，NVM_CloseFileDesc
code demo：
nvram中LID对应的结构体如:
typedefstruct
{
charname[4];
int age;
}File_Test_Struct;
int read_write(){
int result;
F_ID test_nvram_id;
int file_lid = AP_CFG_RDCL_FILE_TEST_LID;
int test_fd;
int rec_size=0 , rec_num = 0;
File_Test_Struct test_struct;
bool IsRead = true,IsWrite = false;
printf("read:\n");
test_nvram_id = NVM_GetFileDesc(file_lid, &rec_size, &rec_num,IsRead);//IsRead=true
if(test_nvram_id.iFileDesc < 0){
printf("NVM_GetFileDesc failed\n");
return 0;
}
result = read(test_nvram_id.iFileDesc,&test_struct,rec_num*rec_size);
if(result ！= rec_num*rec_size){
printf("Get file failed\n");
return 0;
}
//读取nvram的数据
printf("---------read---------\n");
printf("name:%s\n",test_struct.name);
printf("age:%d\n",test_struct.age);
printf("------------------\n");
if(！NVM_CloseFileDesc(test_nvram_id))
{
printf("NVM_CloseFileDesc failed\n");
}
printf("write:\n");
test_nvram_id = NVM_GetFileDesc(file_lid, &rec_size, &rec_num,IsWrite);//IsWrite=false
if(test_nvram_id.iFileDesc < 0){
printf("NVM_GetFileDesc failed\n");
return 0;
}
test_struct.name[0] = 'j';
test_struct.name[1] = 'u';
test_struct.name[2] = 'd';
test_struct.name[3] = 'y';
test_struct.age = 20;
printf("--------write----------\n");
result = write(test_nvram_id.iFileDesc,&test_struct,rec_num*rec_size);
if(result ！= rec_num*rec_size){
printf("write file failed\n");
return 0;
}
if(！NVM_CloseFileDesc(test_nvram_id))
{
printf("NVM_CloseFileDesc failed\n");
}
return 0;
}

挺完整的！