MPU nteraction with a Endpointrest through wifi

Thank you for your response

Actually I am having trouble dealing with Buildroot and Wi-Fi connection. The patches installed and given by Buildroot are not actual.

For someone newly introduced to buildroot I made some research and had some basic knowledge but some specific things like installing new patches and configuring drivers are not detailed and I try since 1 week to connect my board to Wi-Fi.

This is what I get every time :

Successfully initialized wpa_supplicant

nl80211: 'nl80211' generic netlink not found

Failed to initialize driver 'nl80211'

wlan0: Unsupported driver 'nl80211'

FAIL

When I lshw I get: 

lshw -class network *

-network description: Ethernet interface physical id: 1 logical name: eth0 serial: 00:80:e1:42:6b:16 size: 1Gbit/s capacity: 1Gbit/s capabilities: ethernet physical tp aui bnc mii fibre 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=st_gmac driverversion=Jan_2016 duplex=full ip=192.168.8.15 link=yes multicast=yes port=MII speed=1Gbit/s

My kernel and system Configurations are more than correct and I enable all needed features.

Dear @Lukas Brückner​,

thanks for the instructions!

When using 'brcmfmac43430-sdio.txt' as you suggested, you need to activate the 'Broadcom BRCM bcm43***' firmware at Target packages instead of 'Broadcom BRCM bcm43xx'. Otherwise 'brcm/brcmfmac43430-sdio.bin' will not be available on the target.

It goes to /lib/firmware/brcm on your target after building (you can use the buildroot overlay function for example). Buildroot will also copy the bcrm firmware to that folder, be sure to enable it, too.

Some detail I may want to share is that in linux-menuconfig under

> Networking support > Wireless I get a "-*-" in front of "Wireless" and not a [*]

That just means the wifi got selected from another option that depends on it.

Are you using the ST provided kernel (https://github.com/STMicroelectronics/linux)?

Maybe the dmesg output will help you as well.

Hi @shane mattner​ ,

I am unable to test right now, but as far as I could look it up you should have that in your stm32mp157c-dk2.dts file (I didn't put it there, this is shipped with the ST Kernel (https://github.com/STMicroelectronics/linux):

/* Wifi */
&sdmmc2 {
	arm,primecell-periphid = <0x10153180>;
	pinctrl-names = "default", "opendrain", "sleep";
	pinctrl-0 = <&sdmmc2_b4_pins_a>;
	pinctrl-1 = <&sdmmc2_b4_od_pins_a>;
	pinctrl-2 = <&sdmmc2_b4_sleep_pins_a>;
	non-removable;
	st,neg-edge;
	bus-width = <4>;
	vmmc-supply = <&v3v3>;
	mmc-pwrseq = <&wifi_pwrseq>;
	#address-cells = <1>;
	#size-cells = <0>;
	status = "okay";
 
	brcmf: bcrmf@1 {
		reg = <1>;
		compatible = "brcm,bcm4329-fmac";
	};
};

So your wifi should be indeed mentioned in your device tree. Are you trying to use the mainline kernel (aka the one buildroot suggests you by default)? The mainline one seems not to have it. As you can sse in the device tree, the driver used for the wifi should be the bcm4329-fmac.

Besides the device tree and the above mentioned device drivers I can share my Network support -> Wireless settings (see picture).

Hope it helps!

Hi

Well I managed to work it out alone actually with the help of a friend.

The solution concerns people using buildroot.

1) Invoke the Kernel configuration utility using make linux-menuconfig in your Buildroot directory on

your host machine.

2) Enable Wireless Networking support under Networking support

3) Enable cfg80211 - wireless configuration API, and Generic IEEE 802.11 Networking Stack

(mac80211), under Networking Support,Wireless

4) Enable EEPROM 93CX6 support under Device Drivers, Misc devices, EEPROM support. Required

for RTL8187 module in my Wi-Fi dongle, may not be needed for your particular adapter

5) Enable Wireless LAN driver support under Device Drivers, Network device support

6) Invoke make menuconfig within the buildroot folder from a command prompt

7) Select package iw required to configure wireless networking, under Target packages, Networking applications.

Enable iproute2 if you want to use the ip utility instead of ifconfig.

9) Select package wpa_supplicant and its sub-packages for WPA/WPA2 support:

- Install wpa_cli binary

- Install wpa_passphrase binary

- Enable Support for soft Ap

9) Activated Broadcom FullMAC WLAN driver as module ( : Press space several time to change it)

10) Activated SDIO bus interface support for FullMAC driver

11) Activated wpa_supplicant dhcp

12) go to /lib/firmware and create a directory name firmware

13) git clone git://github.com/murata-wireless/cyw-fmac-fw.git;protocol=https;nobranch=1;name=

murata;destsuffix=murata

14) git checkout -b 8d87950bfad28c65926695b7357bd8995b60016a. If you wnt to check the version then

use:

sha256sum brcmfmac43430-sdio.bin

3ea748266c78351880d6389d672bd22eb0e13629c0607b5010a4a410d1395548 brcmfmac43430-sdio.bin

15) get the .txt file from git repository of ST and put the .bin and .txt file on the /lib/firmware/brcm

directory.

16) copy the brcm43430-sdio.1DX.clm_blob to /lib/firmware/brcm and rename it to brcmfmac43430-

sdio.clm_blob

17) make

18) flash your sdcard with the new image

19) Wifi Setup on the target machine

20) make

21) flash your sdcard with the new image

**Wifi Setup on the target machine**

23) Use wpa_passphrase MYSSID passphrase > /etc/wpa_supplicant.con

24) modprobe brcmfmac

25) ifconfig wlan0 up

26) wpa_supplicant -B -iwlan0 -c /etc/wpa_supplicant.conf

# wait a little bit

27) ifconfig -a