@@ -6,51 +6,60 @@ This document describes the general process for porting a development board, rat
...
@@ -6,51 +6,60 @@ This document describes the general process for porting a development board, rat
This document uses the process of porting a development board named **MyProduct** as an example. This development board is provided by **MyProductVendor** and uses the SoC **MySOC** produced by **MySoCVendor**.
This document uses the process of porting a development board named **MyProduct** as an example. This development board is provided by **MyProductVendor** and uses the SoC **MySOC** produced by **MySoCVendor**.
### Defining an SoC<a name="section135mcpsimp"></a>
### Defining a Product<a name="section145mcpsimp"></a>
Create a JSON file named after the SoC name in the **//productdefine/common/device** directory and specify the CPU architecture.
For example, to port **MySOC**, which uses a 32-bit ARM kernel, configure the file as follows:
Create a config.json file in the directory with the name "//vendor/MyProductVendor/{product_name}. This file is used to describe the SoC used by the product and the required subsystems. configure the file as follows:
Currently, **target\_cpu** can be set to **arm** only. In the future, you can set the value depending on the CPU architecture, such as **arm64**, **riscv**, or **x86**.
The main configurations are as follows:
### Defining a Product<a name="section145mcpsimp"></a>
product_name： The product name Required
Create a JSON file named after the product name in the **//productdefine/common/products** directory. This file is used to describe the SoC used by the product and the required subsystems. Configure the file as follows:
version：version Required
//productdefine/common/products/MyProduct.json
type：Configured at the system level, containing (small, standard ...) Required
```
target_cpu ：The CPU type of the device (depending on the actual situation, the target_cpu here may also be arm64, riscv, x86, etc. ） Required
{
"product_name": "MyProduct",
"product_company" : "MyProductVendor",
"product_device": "MySOC",
"version": "2.0",
"type": "standard",
"parts":{
"ace:ace_engine_standard":{},
"ace:napi":{},
...
"xts:phone_tests":{}
}
}
```
ohos_version：Operating system version Optional
The main configurations are as follows:
device_company：device Manufacturer name Required
board：Board name Required
enable_ramdisk：Whether to startramdisk Required
kernel_type and kernel_version: Optional : kernel_type with kernel_version is fixed in the standard and does not need to be written.
subsystems:The subsystem that the system needs to be enabled. Subsystems can simply understand a piece of function that is built independently. Required
1.**product\_device**: SoC used by the product.
product_company：Not reflected in the configuration, but in the directory name, the next directory of the vendor is product_company, build.gn script can still be accessed.
2.**type**: system level. In this example, set it to **standard**.
3.**parts**: subsystem to enable. A subsystem can be treated as an independently built functional block.
You can find available subsystems in **//build/subsystem\_config.json**. You can also customize subsystems.
You can find available subsystems in **//build/subsystem\_config.json**. You can also customize subsystems.
...
@@ -83,7 +92,7 @@ Add the following subsystem configuration to the **//build/subsystem\_config.js
...
@@ -83,7 +92,7 @@ Add the following subsystem configuration to the **//build/subsystem\_config.js
},
},
```
```
Then, open the configuration file **//productdefine/common/products/MyProduct.json**, which is used to define the product, and add the new subsystem to the product.
Then, open the configuration file **//vendor/MyProductVendor/MyProduct/config.json**, which is used to define the product, and add the new subsystem to the product.
### 2. Building the Kernel<a name="section182mcpsimp"></a>
### 2. Building the Kernel<a name="section182mcpsimp"></a>
