OpenHarmony富设备移植指南（8）WIFI适配原创

Diemit

发布于 2024-9-19 17:43

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1.系统组件

使用传统WiFi适配方式，我们需要确认系统组件

...
{
      "subsystem": "wpa_supplicant-2.9",
      "components": [
        {
          "component": "wpa_supplicant-2.9",
          "features": [
            "wpa_supplicant_driver_nl80211 = true"
          ]
        }
      ]
    },
...
{
      "subsystem": "communication",
      "components": [
        {
          "component": "wifi",
          "features": [
            "wifi_feature_non_seperate_p2p = true",（树莓派4B需配置此项）
            "wifi_feature_non_hdf_driver = true"
         ]
        }
      ]
    },
...

2.WiFi驱动

WIFI适配首先要确认内核的WIFI驱动正常，以树莓派4B举例，

树莓派4B采用的WIFI是博通芯片，并内置在主板上，WiFi驱动厂商通常会分成两部分，一部分为固件，还有一部分为内核驱动，我们首先把博通的WiFi内核驱动和相关依赖编译进内核：

CONFIG_CFG80211=y
CONFIG_RFKILL=y
CONFIG_BRCMUTIL=y
CONFIG_BRCMFMAC=y

于此同时，我们还需要把WiFi固件内置到OpenHarmony的镜像中，下载WiFi固件：

https://github.com/android-rpi/device_arpi_rpi4/tree/arpi-14/firmware/brcm

配置固件进镜像：

OpenHarmony富设备移植指南（8）WIFI适配 -鸿蒙开发者社区

ohos_prebuilt_etc("brcmfmac43455-sdio.bin") {
  source = "brcm/brcmfmac43455-sdio.bin"
  part_name = "device_rpi4"
  install_images = [ ramdisk_base_dir ]
  module_install_dir = "lib/firmware/brcm"
  install_enable = true
}

ohos_prebuilt_etc("brcmfmac43455-sdio.clm_blob") {
  source = "brcm/brcmfmac43455-sdio.clm_blob"
  part_name = "device_rpi4"
  install_images = [ ramdisk_base_dir ]
  module_install_dir = "lib/firmware/brcm"
  install_enable = true
}

ohos_prebuilt_etc("brcmfmac43455-sdio.txt") {
  source = "brcm/brcmfmac43455-sdio.txt"
  part_name = "device_rpi4"
  install_images = [ ramdisk_base_dir ]
  module_install_dir = "lib/firmware/brcm"
  install_enable = true
}


group("firmware") {
  deps = [
    ":brcmfmac43455-sdio.bin",
    ":brcmfmac43455-sdio.clm_blob",
    ":brcmfmac43455-sdio.txt",
  ]

}

编译烧录启动树莓派之后，通过以下命令检查WiFi是否正常