Monthly Archives: April 2018

VoCore2: Port mt7628.ko to LuCI 2

Keep study 🙂

This is the /etc/config/wireless from old version vocore2(Linux 3.18) which is working well with uci system. Thanks to its contributors. It is from Linkit.

config wifi-device	radio0
	option type     ralink
	option variant	mt7628
	option country	CN
	option hwmode	11g
	option htmode	HT40
	option channel  auto
	option disabled	0

config wifi-iface ap
	option device   radio0
	option mode	ap
	option network  lan
	option ifname   ra0
	option ssid	VoCore2
	option encryption none 

config wifi-iface sta
	option device   radio0
	option mode	sta
	option network  wwan
	option ifname   apcli0
	option led 	mediatek:orange:wifi
	option ssid	UplinkAp
	option key	SecretKey
	option encryption psk
	option disabled	1

Note: this file is generated by /lib/wifi/

Now we can add some log to /lib/netifd/wireless/, check how it read the file and how it call the driver to setup the connection.

It is a pretty long script…

If my last blog is correct, it will call “enable_ralink” … what? no such function…
OK, let’s add some log to it. In every function head, we can add “echo xxxxxx_function >> /tmp/vocore2.log”, it will show the called function name into vocore2.log.

But nothing show in the file…so it is not used at all!

How it works? just a mystery.

Emm, it won’t help, get rid of it, let’s check openwrt with mt76 script, that one works without hack.

No luck today, try tomorrow.

To be continue…

VoCore2: Port mt7628.ko to LuCI

This will be a long journey…
LuCI should be the most easy way to setting router.

I will study from start, try to learn how uci system works and how LuCI works with current openwrt system.

I know something about C/C++, maybe RF, PCB layout or even physics, but I am absolutely a noob of script especially bash.

Lucky me, 50% UCI system is based on shell script. 🙂 So I have a chance to learn it.

For wifi turn on or turn off, all I know is the magic command “wifi”, so what is it?

I find it actually a script, its path can be found by call “which wifi”

interface code of /sbin/wifi

case "$1" in
	down) wifi_updown "disable" "$2";;
	detect) wifi_detect_notice ;;
	config) wifi_config ;;
	status) ubus_wifi_cmd "status" "$2";;
	reload) wifi_reload "$2";;
	reload_legacy) wifi_reload_legacy "$2";;
	--help|help) usage;;
	*) ubus call network reload; wifi_updown "enable" "$2";;

After couple of hours painful decode wifi script, looks like once we call wifi, it will goto ‘*) ubus call network reload; wifi_updown “enable” “$2”;;

I reach a dead end at the beginning. What is this “ubus call network reload”? Is it an important part of uci system? I directly run it in command line, nothing happens…OK, ignore it.

PS: That’s why I hate script, you will be very hard to find what it is exactly doing.

Next it is “wifi_updown enable”. Good name, from its name I know it is able to control enable/disable wifi.

_wifi_updown() {
	for device in ${2:-$DEVICES}; do (
		config_get disabled "$device" disabled
		[ "$disabled" = "1" ] && {
			echo "'$device' is disabled"
			set disable
		config_get iftype "$device" type
		if eval "type ${1}_$iftype" 2>/dev/null >/dev/null; then
			eval "scan_$iftype '$device'"
			eval "${1}_$iftype '$device'" || echo "$device($iftype): ${1} failed"
		elif [ ! -f /lib/netifd/wireless/$ ]; then
			echo "$device($iftype): Interface type not supported"
	); done

wifi_updown() {
	[ enable = "$1" ] && {
		_wifi_updown disable "$2"
		ubus_wifi_cmd "$cmd" "$2"
	ubus_wifi_cmd "$cmd" "$2"
	_wifi_updown "$@"

$DEVICE, this should come from scan_wifi.

wifi script it will read /lib/wifi/, and once we run wifi, it will call function in, scan_mt7628/enable_mt7628/disable_mt7628 and all the parameters are from /etc/config/wireless.

To Be Continue…

VoCore2: Port mt7628.ko for Linux 4.14 Part2

I have upload source code of uictx to github:, and also mt7628 driver.
So you can make your own latest version of openwrt now.

PS: please help me do a homework 🙂

1. use it as a OpenWRT feeds, so people do not have to manually do the compile.

2. combine the api to UCI, so we can use UCI and /etc/config/wireless to control the wifi.

Feel free to submit patch.

Note: my last firmware 20180419.bin have some log like this:

[  108.175895] mmc0: error -22 whilst initialising MMC card
[  108.263953] mtk-sd 10130000.sdhci: no support for card's volts

This is because you do not have SD card hardware. We have two ways, one call “rmmod mtk_sd” in console.

Another, use this firmware :p

md5: 41fc7dfb02bd183de8a520ad146a65b8

I added shellinabox to this firmware, so you can directly access to console without using ssh or putty. Open

Or third way, compile your own firmware without mtk_sd.

Happy hacking!!

VoCore2: Port mt7628.ko to Linux4.14

Yes, I have successfully port mt7628.ko to latest openwrt based on Linux 4.14.

Here is the firmware:

md5: 547fba4379e61fefb145cef2e1c30609

This firmware can not working with uci system yet…

PS: I am still study UCI…

But I write a simple replace.
It is a cgi-bin app, can run in /www/cgi-bin or directly run in console command line.

if you want to use it as webserver, just run in your browser.

if you want to use it as command, just run uictx “f=sta_disconnect” in command line.


### ap_set_ssid

– used to set current ap ssid name.
– usage: ap_set_ssid [ssid]
– example:

### ap_set_password

– used to set current ap ssid password.
– usage: ap_set_password [password]
– example:

## Scan API

### ap_scan

– get nearby ssid, bssid, and signal strength.
– usage: ap_scan
– example:
– return: {“status”:”success”, “message”:””, “ssid1″:”KB86”, “bssid1″:”30:b4:9e:a6:99:bb”, “signal1″:”99”, “ssid2″:””, “bssid2″:”28:6c:07:cc:e7:46”, “signal2″:”18”, “ssid3″:”CX-8888”, “bssid3″:”30:c8:9e:aa:e6:2f”, “signal3″:”57”}

## Station Mode API

### sta_connect

– connect to nearby access point as client device. if everything is correct, it will alloc a ip for apcli0. MUST call ap_scan before sta_connect.
– usage:
– normal ap: sta_connect [ssid] [password]
– hidden ap: sta_connect “” [password] [bssid]
– example1:

note: in the example, “MY ROUTE” has a space, it needs to convert into url format.

– example2:

### sta_disconnect

– disconnect from connected access point, you will immediatily disconnect from your router and vocore will back to ap mode.
– usage: sta_disconnect
– example:

Source code I will upload to github soon.


PS: do not forget setting up the network first.

uci add_list firewall.@zone[1].network="wwan"
uci set network.wan=interface
uci set network.wan.ifname=eth0.2
uci set network.wan.force_link=1
uci set network.wan.proto=dhcp
uci set network.wwan=interface
uci set network.wwan.ifname=apcli0
uci set network.wwan.proto=dhcp
uci commit

VoCore2 + DOOM Port

I spend around 10 hours finish this, looks like it is pretty easy to port exists project to using VoCore2 display.

First checkout source code from, thanks for its contributor jeffdoggett, other DOOM source code I can not even compile 🙂

Only need to change one file /Doom/Source/i_video.c

//	DOOM graphics stuff for VoCore2 Display, OpenWrt.
//  based on i_video.c.

#include "includes.h"
#include "libvodisp.h"

unsigned int SCREENWIDTH = 320;
unsigned int SCREENHEIGHT = 200;
unsigned int ORIGSCREENWIDTH = 320;
unsigned int ORIGSCREENHEIGHT = 200;

union pixel {
    struct _rgb {
        unsigned char red;
        unsigned char green;
        unsigned char blue;
    unsigned int full:24;
static union pixel palette_table[256];
static byte *framebuffer;

void I_InitGraphics (void)
    framebuffer = malloc(800 * 480 * 3);
    memset(framebuffer, 0, 800 * 480 * 3);


void I_ShutdownGraphics(void)

void I_SetPalette (byte* palette)
    unsigned int colour = 0;
    do {
        palette_table[colour]   = gammatable[usegamma][*palette++];
        palette_table[colour] = gammatable[usegamma][*palette++];
        palette_table[colour]  = gammatable[usegamma][*palette++];
    } while (++colour < 256);

void I_FinishUpdate (void)
    byte *src = screens[0], *dst = framebuffer;
    int i, j, pos;

    for (j = 0; j < SCREENHEIGHT; j++) {
        pos = j * 480 * 3;
        for (i = 0; i < SCREENWIDTH; i++)
            *(unsigned int *)(dst + pos + i * 3) = palette_table[*src++].full;


void I_ReadScreen (byte* scr)
    memcpy(scr, screens[0], SCREENWIDTH * SCREENHEIGHT);

void I_InitKeyboard (void)

void I_UpdateNoBlit (void)

void I_SetScreenSize (void)

void I_SetWindowName (const char * title)

void I_StartFrame (void)

void I_StartTic (void)

Here is necessary library and Makefile, you might need to modify.

Download:, uncompress and put it in /Doom/Source then compile.