WRTnode
Contents
- 1 Introduction
- 2 Features
- 3 Specifications
- 4 Starting guide
- 5 UART
- 6 LAN/WAN
- 7 GPIO
- 8 SPI
- 9 I2C
- 10 USB
- 11 USB Serial
- 12 Download & Compile WRTnode static SDK
Introduction
WRTnode, which is based on Wi-Fi AP-Soc, is an open source development board hardware. There is a mediatek MT7620n chip in it.
It is mini, cheap and has pretty low power consumption and reasonable capability of computing. Besides, It is born to high speed of Wi-Fi network exchange.
What does WRTnode aim for? Maybe different people have different opinions. Our team considers it as a high speed and digital version of "Arduino". Since it could connect and interact with USB devices like camera and sound card, we can collect images and voices at the same time and stream out multimedia stream in real time. After a layer of A / D converter, It could directly interact with physical world like all kinds of sensors and motors.
OpenWrt, which is a distribution of embedded Linux, is the system of WRTnode. When multimedia information and various of input and output control focus on a Linux system which has small volume, low power consumption and enough computing capacity, after porting and optimizing the existing pattern recognition, artificial intelligence and other applications, we may setup a series of interesting "smart" devices. And they are supplemented by powerful network capabilities. we may get a structure of MATRIX and NODE. This is where the node in WRTnode comes from.
We pronounce WRTnode as what-node.
As an OpenWrt supported device, WRTnode applies everything on wiki.openwrt.org. We highly recommended take wiki.OpenWrt.org as the trusted reference.
Features
- WRTnode is based on Wi-Fi AP-Soc and it is an open source development board hardware.
- Opensource hardware for OpenWrt
- mini Linux + Wi-Fi board
- easy and completed IDE
- smart machines' heart
- low power consuming
- complete I/Os, high performance
- 300MBit/s Wi-Fi and low price
Specifications
Hardware parameters
- 45mm*50mm
- MTK MT7620N 580MHz MIPS CPU (MIPS24KEc)
- 512Mbit DDR2 ram
- 128Mbit SPI Flash rom
- 300Mbit Wi-Fi 2T2R 802.11n 2.4 GHz
- 23GPIOs
- JTAG
- SPI
- UART Lite
- USB2.0 host
Software Environment
- Based on OpenWrt BARRIER BREAKER (Bleeding Edge, r41508)
- rt2860v2 Wi-Fi driver hacked by lintel
- Customized uboot hacked by manfeel
- WRTnode aplci up-link Wi-Fi configuration (aps/vw/nr/ia)
- Luci Wi-Fi wpa patch for rt2860v2
- Local dns add i.wrtno.de & wrtnode.lan besides openwrt.lan to WRTnode which the default ip is 192.168.8.1
- WRTnode additional feature (all source opened github.com/WRTnode):
- Opencv 2.4.8
- Native gcc-mipsel on mt7620 and bin-utils
- Porting linino (Arduino yun) source to WRTnode
- Shine: fast fixed-point mp3 encoding
- And some WRTnode demo apps:
- opencv application demo
- mechanical control demo
- RESTful front-end demo and some other thing
WRTnode firmware, SDK and cross-compiler toolchain using OpenWrt trunk version, designed for WRTnode maintenance and support by OpenWrt.org official. Meanwhile, WRTnode can use the market all the programs using the MT7620 router firmware and associated SDK and cross-compiler toolchain.
Pin map
Click the pic to see full resolution version. Perspective A pin map
Starting guide
What you will get?
You get the WRTnode in a very nice transparent plastic box, inside the box you get WRTnode stickers too. The box is useful to store various small items useful for WRTnode (USB memory stick, I2C port expander module, jumpers and so on).
Besides these, you get:
The 'special' USB cable customized for WRTnode
The micro USB standard plug will be connected to the WRTnode board and to power the board itself. The USB standard type A plug will be connected to any USB wall adapter, any PC USB port, any USB 5Vdc power supply (at least 500mA (0,5A) current). The USB standard type A receptacle can connect any USB device to the WRTnode board, for example can connect a USB memory stick:
Or a USB webcam like this:
Or you can connect many more USB devices at once through a USB hub like this:
Caution: use USB hub with external 5Vdc power supply if the USB hub connects more than one USB device.
The WRTnode
The golden board is WRTnode and can be seen on the above images.
Power-up the WRTnode board
Connect the micro USB plug to the WRTnode board (if you don't need to connect USB devices to WRTnode, a normal USB data cable with micro USB can work). Connect the USB A plug of the special USB cable to a 5Vdc USB power supply (at least 500mA current - any USB port on a PC can provide this current).
WRTnode connected to a USB port using a standard micro USB data cable
After ~5 seconds, the blue LED on WRTnode will be on, that means that OpenWrt operating system is initializing on the WRTnode board. 20 seconds later, the WRTnode WiFi SSID should be visible on the WiFi networks on the PC: 'WRTnodeXXXX' (XXXX from the SSID refers to the last 4 bytes of WRTnode’s MAC address). Connect your PC or smartphone to WRTnode WiFi SSID using WPA2-PSK encryption and password '12345678'.
Let's play with WRTnode
Login to WRTnode using telnet and ssh
Use any PC with Windows, Linux or MacOS operating system, install PuTTY on Windows PC, use any Linux / MacOS terminal software on Linux / MacOS.
First ping the WRTnode to see if connection is available. The default IP of WRTnode is set to 192.168.8.1, but WRTnode is able to resolve as well i.wrtno.de, wrtnode.lan and openwrt.lan to 192.168.8.1:
ping i.wrtno.de
or
ping wrtnode.lan
or
ping openwrt.lan
Connect to WRTnode using telnet or SSH If you connect first time to WRTnode or you didn't set password for root user of OpenWrt, use telnet to connect:
telnet i.wrtno.de
If you a password for root user was set, use SSH to connect:
ssh root@i.wrtno.de
Input your root password and a similar screen should appear:
No internet no happiness
Because WRTnode may need new applications or needs to update installed applications, an Internet connection is necessary. The WRTnode will be connected to Internet through a WiFi router - you home router connected to Internet.
root@OpenWrt:~# aps
'aps' is a WRTnode customized command which scans the WiFi SSIDs available in your area. You should see as well your home router SSID - let's name it 'OUR_WIFI'. The result should look like this:
WRTnode AP scaner. Begin scaning APs, pls wait... Finished. APs available are... ra0 get_site_survey: Ch SSID BSSID Security Signal(%)W-Mode ExtCH NT WPS DPID 1 Tenda xx:xx:xx:xx:xx:xx NONE 70 11b/g/n ABOVE In YES 1 OUR_WIFI xx:xx:xx:xx:xx:xx WPA2PSK/AES 96 11b/g/n NONE In YES 6 TP-LINK xx:xx:xx:xx:xx:xx NONE 55 11b/g NONE In NO 6 BY01 xx:xx:xx:xx:xx:xx NONE 100 11b/g/n NONE In YES 6 Tenda_xxxxxx xx:xx:xx:xx:xx:xx WPAPSK/AES 50 11b/g/n ABOVE In NO 11 CU_wpFS xx:xx:xx:xx:xx:xx WPAPSK/TKIPAES 70 11b/g/n NONE In YES
Then we have to change the settings of aplci on WRTnode, aplci is configuring the up-link part of the router inside of WRTnode (that's it: WRTnode has an internal router)
root@OpenWrt:~# vw
'vw' is a WRTnode customized command which changes /etc/config/wireless. It is used the file editor named 'vi', a standard editor for Linux, but not very comfortable to use it, therefore here are the tips:
- delete a character: use arrow keys to move cursor under the character you want to delete, press 'x' to delete the character
- insert a character: press 'i' (to enter on insert mode), use arrow keys to move cursor under the character, press whatever character(s) you want to insert, the character(s) will be inserted after the character where the cursor is. Finish by pressing ESC key (to quit insert mode)
- save changes: press ':', then press 'w'
- save changes and quit vi editor: press ':', then press 'x'
- quit vi editor without saving changes: press ':', then press 'q'
config wifi-device 'ra0'
option type 'ralink'
option mode '9'
option channel '1' #This is change number 1
option txpower '100'
option ht '20+40'
option country 'US'
option disabled '0'
config wifi-iface
option device 'ra0'
option network 'lan'
option mode 'ap'
option encryption 'psk2'
option key '12345678'
option ApCliEnable '1'
option ApCliSsid 'aAP' #This is change number 2
option ApCliAuthMode 'WPA2PSK' #This is change number 3
option ApCliEncrypType 'AES' #This is change number 4
option ApCliPassWord '87654321' #This is change number 5
option ssid 'WRTnodeXXXX'
- Change number 1: set the WiFi channel to match the one from our router 'OUR_WIFI' (specified on column 'Ch' from aps output)
- Change number 2: set the WiFi SSID to match the one from our router 'OUR_WIFI'
- Change number 3: set the ApCliAuthMode to match the one from our router 'OUR_WIFI'
Here are the accepted parameters for ApCliAuthMode / ApCliEncrypType, from vw according to aps' security:
aps:Security vw:ApCliAuthMode/ApCliEncrypType ========================================================= WPA1PSKWPA2PSK/TKIPAES WPA2PSK/AES WPA2PSK/AES WPA2PSK/AES WPA2PSK/TKIP WPA2PSK/TKIP WPAPSK/TKIPAES WPAPSK/TKIP WPAPSK/AES WPAPSK/AES WPAPSK/TKIP WPAPSK/TKIP WEP WEP/WEP NONE NONE/NONE
- Change number 4: set the ApCliEncrypType to match the one from our router 'OUR_WIFI'
- Change number 5: set the Password to match the one from our router 'OUR_WIFI' (this must be known by the router owner)
Additionally, if 'OUR_ROUTER' router uses ASCII WEP password, you will need to perform the following commands into HEX code
root@OpenWrt:~# echo -n 'abcde' | hexdump -e '13/1 "%02x" "\n"' #To convert abcde to 6162636465
Also uci (specific to OpenWRT operating system) can be used to change the above settings, but this is beyond the scope of this Wiki section.
- Network reset command:
root@OpenWrt:~# nr
'nr' is a WRTnode customized command which will reset the network side. After 5 seconds it is possible to connect again to WRTnode's SSID. Let's verify if WRTnode got an IP from router 'OUR_WIFI':
root@OpenWrt:~# ia
apcli0 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx
inet addr:192.168.1.103 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: xxxx::xxxx:xxxx:xxxx:xxxx/xx Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Sometimes, router 'OUR_WIFI' may lease the IP after tens of seconds. Let's verify if WRTnode is connected to Internet.
root@OpenWrt:~# ping baidu.com PING baidu.com (220.181.111.85): 56 data bytes 64 bytes from 220.181.111.85: seq=0 ttl=54 time=6.071 ms
In this moment the WRTnode board is connected to the Internet through our home router, we can connect our PC to Internet through the WRTnode and start configure our WRTnode board.
WRTnode software repository
root@OpenWrt:~# opkg update Downloading http://d.wrtnode.com/packages/Packages.gz. Updated list of available packages in /var/opkg-lists/barrier_breaker. root@OpenWrt:~# opkg install <here put the name of the package>
Restore Factory Settings
root@OpenWrt:~# firstboot This will erase all settings and remove any installed packages. Are you sure? [N/y] y /dev/mtdblock5 is mounted as /overlay, only erasing files root@OpenWrt:~# reboot
WRTnode special network cable
WRTnode uses a special network cable - one end has a RJ45 network connector, the second end has a 2x2 female header connector / Dupont connector (see Figure 1):
Figure 1 Cable pinout First of all, this is a T568B cable. T568B cable is the cable used to connect a computer to a router at home. So get a T568B cable, cut one RJ45 end connector and prepare all the 8 wires from the cable following the pinout from Table 1:
Use only the green, green and white, orange, orange and white wires from the T568B cable. The rest of 4 wires can be cut, they are not useful for our application. The 4 wires selected above have to be solder to a 2x2 female header connector (Dupont connector) according to pinout from Table 2:
After the cable is completed, it can be connected to WRTnode board like in Figure 2:
Figure 2 If a factory cable is used, on the female header connector it is visible a small black arrow which corresponds to Pin 1. This cable can be connected to any of the 4 LAN ports from the WRTnode board taking into consideration that the arrow (Pin 1 on the connector's cable) corresponds to WRTnode pins number 2, 4, 6, 8. Pin 2 from the cable corresponds to WRTnode pins 1, 3, 5, 7. Following figure shows the cable Pin 1 connected to pin 4 on WRTnode (Figure 3). As shown in Figure 2, pins for LAN and WAN ports are defined on the right side of the WRTnode board, Figure 3 below shows the network cable connected to WRTnode.
Figure 3
Let's move on!
UART
Release UART
Since mt7620n only one UART lite interface, native OpenWrt used as the core print and tty console .
And in many cases, require t0 use the serial communication with an external chip on the line, then you need to release the port from OpenWrt.
In fact, this task is only two steps :( we assume that $(TOPDIR) was the compiler directory of OpenWrt )
- Close serial console
The one comment out $(TOPDIR)/target/linux/ramips/base-files/etc/inittab file below：
::askconsole:/bin/ash --login
$vi $(TOPDIR)/target/linux/ramips/base-files/etc/inittab
::sysinit:/etc/init.d/rcS S boot ::shutdown:/etc/init.d/rcS K shutdown #::askconsole:/bin/ash --login
- Close kernel Print
In the $(TOPDIR)/package/base-files/files/etc/config/system file, add the following two：
option 'conloglevel' '1' option 'kconloglevel' '1'
$vi $(TOPDIR)/package/base-files/files/etc/config/system
config system
option 'conloglevel' '1'
option 'kconloglevel' '1'
option hostname OpenWrt
option timezone UTC
config timeserver ntp
list server 0.openwrt.pool.ntp.org
list server 1.openwrt.pool.ntp.org
list server 2.openwrt.pool.ntp.org
list server 3.openwrt.pool.ntp.org
option enable_server 0
Through the above two steps, you can turn off all systems of OpenWrt serial interaction, except for the first ten seconds of uboot printing information and Kernel early printing information (residual print information about this part, the proposed development of the next-bit machine when the system has just started made redundant).
The above methods are OpenWrt source inside modify, compile the new firmware, the new firmware release can be burned into WRTnode serial.
Because of OpenWrt writable file system, which also can modify WRTnode existing firmware in the /etc/inittab and /etc/config/system files directly, you can release the port after the restart.
LAN/WAN
LAN/WAN config
In many cases, we need to customize a particular network port for LAN or WAN side on the WRTnode board.
There are many ways to accomplish this task: uboot compile-time setting in OpenWrt compile-time setting in OpenWrt of set in the configuration file.
Here we explain one of the most simple way: in: | set Wikipedia OpenWrt OpenWrt of the configuration file, and then explain how to compile OpenWrt Firmware stage default this setting.
In the OpenWrt after the start, we can find the /etc/config/nework file, edit the file using vi, you can find the following:
config switch_vlan
option device 'switch0'
option vlan '1'
option ports '1 2 3 4 6t'
config switch_vlan
option device 'switch0'
option vlan '2'
option ports '0 6t'
The above setup defines 2 vlan, 6t defines the mt7620 built-in switch, 1,2,3,4 defines 4 LAN, 0 defines an Ethernet WAN.
So, we can change the vlan 0, 1,2,3,4 according to our needs in order to define a LAN or WAN port (or even all network ports can be set to LAN or WAN, P-) However, the consequences ~ ~).
When done, simply restart the network interface
/etc/init.d/network restart
We can define the network ports and setup on OpenWRT start, we want that firmware compilation phase to complete this by default.
We assume that $(TOPDIR) for OpenWrt of compiler directory.
vi $(TOPDIR)/target/linux/ramips/base-files/etc/uci-defaults/02_network
Find the following parameters:
wrtnode)
ucidef_set_interfaces_lan_wan "eth0.1" "apcli0"
ucidef_add_switch "switch0" "1" "1"
ucidef_add_switch_vlan "switch0" "1" "1 2 3 4 6t"
ucidef_add_switch_vlan "switch0" "2" "0 6t"
;;
Now you should know how to change the network ports according to your needs :)
Keep on rock！
GPIO
Device Tree Source
一：device tree source birth
In the past linux kernel, such as: ARM Linux in, arch/arm/plat-xxx and arch/arm/mach-xxx filled with a lot of garbage code, a considerable majority of the code just in describing the board level detail.
These board-level details for the kernel is concerned, but is garbage, such as platform device board, resource, i2c_board_info, spi_board_info and various hardware platform_data.
Device Tree is a data structure describing the hardware, which originated in OpenFirmware (OF).
In Linux 2.6 in, ARM architecture plate too much hardware details are hard-coded in the arch /arm/plat-xxx and arch/arm/mach-xxx, after using the Device Tree, many details of the hardware can be passed directly through it to Linux, without the need for a lot of redundancy in the coding in kernel. Device Tree named by a series of nodes (node) and attribute (property) composed of the node itself may contain sub nodes. The so-called property, in fact, occur in pairs name and value. In the Device Tree, the information can be described, including (former mostly hard code this information to the kernel in):
The number and type of CPU
Memory base address and size
Bus and bridge
Peripheral connections
Interrupt controller and interrupt usage
GPIO controller and GPIO usage
Clock controller and Clock Usage
It is basically draw a circuit board CPU, bus, equipment consisting of trees, Bootloader will be passed to the kernel tree, then the kernel can identify this tree, And according to it launched a Linux kernel platform_device, i2c_client, spi_device and other equipment, and these devices use memory, IRQ and other resources, has also been passed to the kernel, the kernel will bind these resources to expand the appropriate device.
二： Device Tree composition and structure
Device Tree involve the whole broad face, that adds new text format used to describe the device hardware information, but also increases the tool to compile the text, but also needs the support Bootloader Device compiled Tree will be passed to the Linux kernel.
DTS (device tree source)
.dts file is an ASCII text description Device Tree format, the text format is very user-friendly, suitable for human reading habits.
Basically, mips Linux, a .dts file corresponds to a mips the machine, usually placed in /target/linux/ramips/dts directory.
Due to an SoC may correspond to multiple machine (an SoC can correspond to multiple products and circuit boards), bound to these .dts file should contain many common parts, Linux kernel in order to simplify,
The common part of the common parts of SoC or more machine usually refined for .dtsi, similar to the C language header files. Other machine corresponding .dts to include this .dtsi. For example, for MT762n terms, mt7620n.dtsi was called WRTNODE.dts, WRTNODE.dts the following line:
/include/ "mt7620n.dtsi"
Of course, and is similar to the C language header files, .dtsi can also include other .dtsi, for example, almost all ARM SoC's .dtsi all references skeleton.dtsi. .dts (or which include a .dtsi) basic elements and attributes of the nodes is described hereinbefore
For example：m25p80的spi flash
m25p80@0 {
#address-cells = <1>;
#size-cells = <1>;
#compatible = "mx25l6405d";
compatible = "w25q128";
reg = <0 0>;
linux,modalias = "m25p80", "w25q128";
spi-max-frequency = <10000000>;
partition@0 {
label = "u-boot";
reg = <0x0 0x30000>;
read-only;
};
partition@30000 {
label = "u-boot-env";
reg = <0x30000 0x10000>;
read-only;
};
factory: partition@40000 {
label = "factory";
reg = <0x40000 0x10000>;
read-only;
};
partition@50000 {
label = "firmware";
reg = <0x50000 0xfb0000>;
};
};
m25p80 @ 0 is the junction point, partition @ 0, factory: partition @ 40000 is his child nodes.
Organizational form compatible attribute is <manufacturer>, <model>, in fact, remove the manufacturer alias prefix compatible property before the comma. On this point, you can see drivers /spi/spi.c source code, function spi_match_device () exposes more detail, if an alias appears in the device spi_driver of id_table inside, or alias name field spi_driver same, SPI devices and drive can be matched.
Specific dts presentation can refer [1]
Release the reuse of gpio
-: According mt7620 datasheet in GPIO pin share schemes and WRTnode gpio pins feature can be used to customize the gpio pin marked as shown below:
Note: The red box is a combination of WRTnode interface parameters obtained can be released gpio multiplexed pins.
二: mt7620n.dtsi in the registration of gpio
We assume that $(TOPDIR) for OpenWrt of compiler directory.
In the $(TOPDIR)/target/linux/ramips/dts/mt7620n.dtsi registered to gpio
Note: The combination of mt7620 datasheet in GPIO pin share schemes and in mt7620n.dtsi where we see the GPIO#0 to GPIO#72 (middle just do GPO or GPI's) are divided into four groups GPIO0-GPIO3;
GPIO0 is starting from the GPIO#0 to GPIO#23, a total of 24;
GPIO1 is starting from the GPIO#24 to GPIO#39, a total of 16;
GPIO2 is starting from the GPIO#40 to GPIO#71, a total of 32;
GPIO3 corresponds corresponding GPIO#72, only one.
三: Sign in WRTNODE.dts inside of led, keys, etc.
In the $(TOPDIR)/target/linux/ramips/dts/WRTNODE.dts where you can register through gpio interface control devices, such as led, keys, etc.
If you want to use the GPIO interface, you need to enable the GPIO and release the GPIO pin standby function:
Enable GPIO:
Release gpio pin alternate function:
Definition pin multiplexing in $(TOPDIR)/build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/linux-ramips_mt7620n/linux-3.10.28/arch/mips/ralink/mt7620.c
Note: The path is not necessarily for this, according to your own kernel version, linux-3.10.xx
For example, i2c_grp, from gpio#1 start, including gpio#1 and gpio#2, a total of two gpio;
spi refclk, from gpio#37 start, including gpio#37, gpio#38 and gpio#39, a total of three gpio.
Similarly, other reuse the same pin definitions.
Note: dts registered in the device is very simple, such as registration gpio-leds is, compatible with Led to drive leds-gpio.c in compatible correspondence, label is the name of the device, the device registration is successful, the file system will be under WRTnode there are /sys/class/leds/wrtnode:blue:wan, we can look commands to control the light off
$echo 1 > /sys/class/leds/wrtnode\:blue\:wan/brightness
$echo 0 > /sys/class/leds/wrtnode\:blue\:wan/brightness
gpios = <& gpio2 0 1>, which is designated corresponding gpio pins (GPIO#40)
The user space gpio calls
User space access gpio, namely through sysfs access gpio interface
control the gpio directory in: / sys/class/gpio
- /sys/class/gpio/export
export is used to notify system need to export control GPIO pin number
- /sys/class/gpio/unexport
unexport is used to cancel the export notification to system
- /sys/class/gpio/gpiochipX
gpiochipX said is a gpio_chip, used to manage and control a group of gpio port controller Directory information stored system GPIO registers,
Base: starting each register control pin number,
label: register a name or logo
ngpio: the total number of pins
- /sys/class/gpioN
gpioN: specific gpio pin
direction: the direction of the gpio port, read the result is in or out.
value: level of gpio pin, 0 (low level) 1 (high level), if the gpio is configured as output, the value is writable, remember any nonzero value will output a high level
edge: the interrupt is triggered
Export the gpio pins
1 Calculate the pin number
pin number = base of control pin register + offset of control pin register
2 /sys/class/gpio/export write the number
for example gpio0 ,after the success of the command to generate/sys/class/gpio/gpio0 directory, if there are no corresponding directory, illustrate the pin cannot be derived
echo 0 > /sys/class/gpio/export
3 The direction file in /sys/class/gpio/gpio0
direction: define input and output
defined as the output：
echo out > direction
defined as the input：
echo in > direction
4 The value file in /sys/class/gpio/gpio0
Value: level of gpio pin, 0 (low level) 1 (high level), if the gpio is configured as output, the value is writable, remember any nonzero value will output a high level
echo 1 > value
export gpio0 pin：
But when we execute unexport will prompt error
echo 0 > /sys/class/gpio/unexport echo 0 > /sys/class/gpio/export ash: write error: Invalid argument
The solution:
The ticket for gpio unexport
The patch for gpio-ralink.c
How to register a GPIO as Led or Button
"make menuconfig" to enter the configuration interface,select: Led driver:
LED modules ---> <*> kmod-leds-gpio
<*> kmod-ledtrig-usbdev
Button driver:
Other modules ---> <*> kmod-gpio-button-hotplug.
Open the WRTNODE.dts add Led：
gpio-leds {
compatible = "gpio-leds";
indicator {
label = "wrtnode:blue:indicator";
gpios = <&gpio1 14 1>;
};
};
"compatible" match "compatible" in leds-gpio.c, "label" is the name of the device，<&gpio1 14 1> is equivalent to GPIO#40
add Button:
gpio-keys-polled {
compatible = "gpio-keys-polled";
#address-cells = <1>;
#size-cells = <0>;
poll-interval = <20>;
reset {
label = "reset";
gpios = <&gpio0 1 1>;
linux,code = <0x198>;
};
};
SPI
WRTnode add spi slave
一：Modify spi controller driver to achieve the support of the spi cs1
We assume that $(TOPDIR) for OpenWrt of compiler directory. open spi-rt2880.c vim $(TOPDIR)/build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/linux-ramips_mt7620n/linux-3.10.49/drivers/spi/spi-rt2880.c find struct rt2880_spi_ops then set spi_ops[0].num_cs = 2 static struct rt2880_spi_ops spi_ops[] = {
{
.init_hw = rt2880_spi_reset,
.set_cs = rt2880_spi_set_cs,
.baudrate_set = rt2880_spi_baudrate_set,
.write_read = rt2880_spi_write_read,
.num_cs = 1, // .num_cs = 2
}, {
.init_hw = rt5350_spi_reset,
.set_cs = rt2880_spi_set_cs,
.baudrate_set = rt2880_spi_baudrate_set,
.write_read = rt2880_spi_write_read,
.num_cs = 2,
}, {
.init_hw = mt7621_spi_reset,
.set_cs = mt7621_spi_set_cs,
.baudrate_set = mt7621_spi_baudrate_set,
.write_read = mt7621_spi_write_read,
.num_cs = 1,
},
}; 二：Complete the registration of spi slave device where the dts cd $(TOPDIR)/ wget --no-check-certificate https://raw.githubusercontent.com/WRTnode/openwrt-patches/master/R39786/wrtnode_spidev_dts.patch patch -p1 < wrtnode_spidev_dts.patch
三：spi configuration
make menuconfig Kernel modules ---> SPI Support ---> <*> kmod-spi-dev 四：Compile make 五：flash Firmware The new firmware re-programmed into the WRTnode, perform the following operations on WRTnode：
ls /dev
Provide a demo for spidev
WRTnode add spi cs1
Select the drive and test program
make menuconfig -*- kmod-spi-dev................................. User mode SPI device driver <*> spidev-test.......................................... SPI testing utility
Modify the driver code patch：
wget https://raw.githubusercontent.com/WRTnode/openwrt-patches/master/R45620/0402-WRTndoe-spi-add-cs1.patch cd ./build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/linux-ramips_mt7620n/linux-3.10.49 patch -p1 < 0402-WRTndoe-spi-add-cs1.patch
0402-WRTndoe-spi-add-cs1.patch:
--- a/drivers/spi/spi-rt2880.c 2015-01-26 14:49:36.269930576 +0000
+++ b/drivers/spi/spi-rt2880.c 2015-07-30 10:33:42.193259659 +0000
@@ -34,6 +34,8 @@
#define RAMIPS_SPI_DEV_OFFSET 0x40
+#define RAMIPS_SPI_GPIO 0x60
+
#define RAMIPS_SPI_STAT(cs) (0x00 + (cs * RAMIPS_SPI_DEV_OFFSET))
#define RAMIPS_SPI_CFG(cs) (0x10 + (cs * RAMIPS_SPI_DEV_OFFSET))
#define RAMIPS_SPI_CTL(cs) (0x14 + (cs * RAMIPS_SPI_DEV_OFFSET))
@@ -553,6 +555,8 @@
static void rt5350_spi_reset(struct rt2880_spi *rs)
{
int cs;
+ void __iomem *base_gpio;
+ u32 val_gpio;
rt2880_spi_write(rs, RAMIPS_SPI_ARBITER,
SPICTL_ARB_EN);
@@ -563,6 +567,12 @@
SPICFG_SPICLK_DIV16 | SPICFG_SPICLKPOL);
rt2880_spi_write(rs, RAMIPS_SPI_CTL(cs), SPICTL_HIZSDO | SPICTL_SPIENA);
}
+
+ base_gpio = rs->base - 0xb00;
+ val_gpio = ioread32(base_gpio + RAMIPS_SPI_GPIO);
+ val_gpio &= ~(3 << 11);
+ iowrite32(val_gpio,base_gpio + RAMIPS_SPI_GPIO);
+
}
static void mt7621_spi_reset(struct rt2880_spi *rs)
Register spi equipment
wget https://raw.githubusercontent.com/WRTnode/openwrt-patches/master/R45620/wrtnode_spidev_dts.patch patch -p1 < wrtnode_spidev_dts.patch
wrtnode_spidev_dts.patch:
--- a/target/linux/ramips/dts/WRTNODE.dts 2015-07-23 14:48:30.402882723 +0000
+++ b/target/linux/ramips/dts/WRTNODE.dts 2015-07-29 12:06:40.000000000 +0000
@@ -53,6 +53,17 @@
reg = <0x50000 0xfb0000>;
};
};
+
+ spidev@40 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "spidev";
+ reg = <1 0>;
+ linux,modalias = "spidev", "spidev";
+ spi-max-frequency = <10000000>;
+
+ };
+
};
};
@@ -79,14 +90,10 @@
ralink,group = "ephy", "wled", "pa", "i2c", "wdt", "uartf";
ralink,function = "gpio";
};
- };
- };
-
- gpio-leds {
- compatible = "gpio-leds";
- indicator {
- label = "wrtnode:blue:indicator";
- gpios = <&gpio1 14 0>;
+ spi_cs {
+ ralink,group = "spi refclk";
+ ralink,funtion = "spi refclk";
+ };
};
};
compile
make V=s
Flash firmware
ls /dev
I2C
WRTnode add i2c support
Because the i2c driver is not stable, so we recommend use gpio simulation i2c 1：Edit file WRTNODE.dts (located in target/linux/ramips/dts/) and add following code:
$vim WRTNODE.dts
palmbus@10000000 {
... ...
i2c@900 {
compatible = "ralink,mt7620n-i2c", "ralink,rt2880-i2c";
reg = <0x900 0x100>;
resets = <&rstctrl 16>;
reset-names = "i2c";
#address-cells = <1>;
#size-cells = <0>;
pinctrl-names = "default";
pinctrl-0 = <&i2c_pins>;
status = "okay";
};
... ...
};
2：Edit WRTNODE.dts by removing "i2c" ralink.group: Original code:
pinctrl {
state_default: pinctrl0 {
default {
ralink,group = "ephy", "wled", "pa", "i2c", "wdt", "uartf" ,"spi refclk";
ralink,function = "gpio";
};
};
};
After modifying the code：
pinctrl {
state_default: pinctrl0 {
default {
ralink,group = "ephy", "wled", "pa", "wdt", "uartf" ,"spi refclk";
ralink,function = "gpio";
};
};
i2c_pins: i2c {
i2c {
ralink,group = "i2c";
ralink,function = "i2c";
};
};
};
3: I2C configuration
$make menuconfig
4: Compile
$make
5: Refresh Firmware Load the new firmware in WRTnode and perform the following operations on WRTnode：
$cd /lib/modules/$(kernel-version) $insmod i2c-dev.ko $cd /dev $ls
Now you should see the i2c-0
$ls -all i2c-0
Now I2C was added succesfully to the WRTnode board. 6: Install i2c-tools(i2cdetect,i2cdump,i2cget,i2cset)
$opkg update $opkg install i2c-tools
Assuming connect the slave device mpu6050. For example: Read the value of the register
$i2cget -y 0 0x68 0x6b
For example: Write the value of the register
$i2cset -y 0 0x68 0x6b 0x80
0：/dev/i2c-0 0x68: slave device address 0x6b: register 0x80: the value written to the register 0x6b dev is the abbreviation of device. /dev directory is very important for all users because this directory contains the external devices used in all Linux systems. It is actually the link to the port of the external devices. Therefore accessing these devices it is a very simple task similar to accessing a file or a directory.
WRTnode add i2c-gpio support
Mt7620n i2c driver stability is poor, we recommend using gpio to simulate i2c I2C gpio configuration
make menuconfig
Kernel modules ---> I2C support ---> <*> kmod-i2c-gpio-custom.
patch There is a warning when rmmod i2c-gpio-custom
wget https://raw.githubusercontent.com/WRTnode/openwrt-patches/master/R45620/WRTndoe-i2c-gpio-custom.patch patch -p1 < WRTndoe-i2c-gpio-custom.patch
--- a/package/kernel/i2c-gpio-custom/src/i2c-gpio-custom.c 2014-07-01 11:30:31.149861607 +0000 +++ b/package/kernel/i2c-gpio-custom/src/i2c-gpio-custom.c 2015-07-28 08:15:20.000000000 +0000 @@ -96,7 +96,7 @@ for (i = 0; i < nr_devices; i++) if (devices[i]) - platform_device_put(devices[i]); + platform_device_unregister(devices[i]); } static int __init i2c_gpio_custom_add_one(unsigned int id, unsigned int *params)
WRTNODE.dts
default WRTNODE.dts: gpio#1 as a reset button , gpio#38 as a led
For example,if you want use gpio#1
/*
gpio-keys-polled {
compatible = "gpio-keys-polled";
#address-cells = <1>;
#size-cells = <0>;
poll-interval = <20>;
reset {
label = "reset";
gpios = <&gpio0 1 1>;
linux,code = <0x198>;
};
};
*/
compile
make V=s
Flash firmware then insmod module
insmod i2c-dev insmod i2c-gpio-custom bus0=0,1,2
parameter:<id> <sda> <scl> <id> ID to used as device_id for the corresponding bus (required) <sda> GPIO pin ID to used for SDA (required) <scl> GPIO pin ID to used for SCL (required)
ls /dev
USB
Add USB mobile hard disk
Add USB support: old usb1.0, usb2.0, install usb storage device
Kernel modules ---> USB Support ---> kmod-usb-ohci
kmod-usb2
kmod-usb-storage
kmod-usb-storage-extras
Adding support for mobile hard disk EXT4 format and FAT16 / FAT32 format
Kernel modules ---> Filesystems ---> kmod-fs-ext4
kmod-fs-vfat
kmod-fs-autofs4
Add CP437 encoding, UTF8 encoding, ISO8859-1 encoding
Kernel modules ---> Native Language Support --->kmod-nls-cp437
kmod-nls-utf8
kmod-nls-iso8859-1
Add loading, unloading tools
Utilities ---> Filesystem ---> ntfs-3g Base system ---> block-mount Utilities ---> mount-utils
NTFS:
Fat32:
Usb camera
hardware： WRTnode The 'special' USB cable customized for WRTnode or WRTnode standard shield Usb camera software： WRTnode sdk or openwrt trunk configure:
make menoconfig
Multimedia ---> <*> mjpg-streamer -- > [*] Install input uvc plugin
[*] Install output http plugin
Kernel modules ---> Video Support ---> <*> kmod-video-core......
<*> kmod-video-uvc....
-*- kmod-video-videobuf2.
compile:
make V=s
flash firmware then do the following： The first step: is there a video equipment
ls /dev
The second step: to view the parameters of the mjpg_streamer
mjpg_streamer --help
The third step: open the usb camera
mjpg_streamer -i "input_uvc.so -f 30 -r 1280*720" -o "output_http.so -p 8080"
The default device is video0, if your device is not video0, you need to use the -d specify your device：
mjpg_streamer -i "input_uvc.so -d /dev/video1 -f 30 -r 1280*720" -o "output_http.so -p 8080"
-f frames per second -r The resolution of the video equipment -p network port number The fourth step： open the VLC player，Ctrl+n to open the window "open media" The default IP address is 192.168.8.1
USB Serial
How to usb Qualcomm gobi 2000 3g module on WRTnode
Hardware:
- WRTnode board
- WRTnode standard shield ( or the 'special' USB cable )
- Qualcomm gobi 2000 3g module
- SIM card
software:
#make menuconfig
LuCI ---> Protocols ---> <*> luci-proto-3g
Kernel modules ---> USB Support ---> <*>kmod-usb-serial
<*> kmod-usb-serial-option
-*- kmod-usb-serial-wwan
<*>kmod-usb-serial-qualcomm.
<*>kmod-usb-serial-sierrawireless
#make
Flash firmware
Insert SIM card in Qualcomm gobi 2000 3 g module’s SIM card slots.
Point your browser tohttp://192.168.8.1
Luci - > Network - > interfaces
Edit wan：
Save&Apply Gps function：
#wget http://d.wrtnode.com/WikiDownload/Qualcomm-gobi-2000-3g/gobi_loader_0.7_ramips_24kec.ipk #opkg install /tmp/gobi_loader_0.7_ramips_24kec.ipk #mkdir /tmp/gobi #cd /tmp/gobi #wget http://d.wrtnode.com/WikiDownload/Qualcomm-gobi-2000-3g/apps.mbn #wget http://d.wrtnode.com/WikiDownload/Qualcomm-gobi-2000-3g/amss.mbn #wget http://d.wrtnode.com/WikiDownload/Qualcomm-gobi-2000-3g/UQCN.mbn #gobi_loader -2000 /dev/ttyUSB0 /tmp/gobi #echo -n "\$GPS_START" >/dev/ttyUSB2 #cat /dev/ttyUSB2
GPS - NMEA sentence information
$GPGGA
Global Positioning System Fix Data
eg3. $GPGGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx*hh
1 = UTC of Position
2 = Latitude
3 = N or S
4 = Longitude
5 = E or W
6 = GPS quality indicator (0=invalid; 1=GPS fix; 2=Diff. GPS fix)
7 = Number of satellites in use [not those in view]
8 = Horizontal dilution of position
9 = Antenna altitude above/below mean sea level (geoid)
10 = Meters (Antenna height unit)
11 = Geoidal separation (Diff. between WGS-84 earth ellipsoid and mean sea level. -=geoid is below WGS-84 ellipsoid)
12 = Meters (Units of geoidal separation)
13 = Age in seconds since last update from diff. reference station
14 = Diff. reference station ID#
15 = Checksum
$GPGSA
GPS DOP and active satellites eg1. $GPGSA,A,3,,,,,,16,18,,22,24,,,3.6,2.1,2.2*3C eg2. $GPGSA,A,3,19,28,14,18,27,22,31,39,,,,,1.7,1.0,1.3*35 1 = Mode:
M=Manual, forced to operate in 2D or 3D
A=Automatic, 3D/2D
2 = Mode:
1=Fix not available
2=2D
3=3D
3-14 = IDs of SVs used in position fix (null for unused fields) 15 = PDOP 16 = HDOP 17 = VDOP $GPGSV
GPS Satellites in view eg. $GPGSV,3,1,11,03,03,111,00,04,15,270,00,06,01,010,00,13,06,292,00*74
$GPGSV,3,2,11,14,25,170,00,16,57,208,39,18,67,296,40,19,40,246,00*74 $GPGSV,3,3,11,22,42,067,42,24,14,311,43,27,05,244,00,,,,*4D
$GPGSV,1,1,13,02,02,213,,03,-3,000,,11,00,121,,14,13,172,05*67
1 = Total number of messages of this type in this cycle 2 = Message number 3 = Total number of SVs in view 4 = SV PRN number 5 = Elevation in degrees, 90 maximum 6 = Azimuth, degrees from true north, 000 to 359 7 = SNR, 00-99 dB (null when not tracking) 8-11 = Information about second SV, same as field 4-7 12-15= Information about third SV, same as field 4-7 16-19= Information about fourth SV, same as field 4-7 and so on . Specific GPS - NMEA sentence information can refer [2]
Download & Compile WRTnode static SDK
Compiling WRTnode static SDK
Features:
- Based on OpenWrt BARRIER BREAKER (Bleeding Edge, r41508)
- OpenWrt trunk on Linux Kernel 3.10.44
- rt2860v2 Wi-Fi driver hacked by lintel
- Customized uboot hacked by manfeel
- WRTnode aplci up-link Wi-Fi configuration (aps/vw/nr/ia)
- Luci Wi-Fi wpa patch for rt2860v2
- Local dns add i.wrtno.de & wrtnode.lan besides openwrt.lan to WRTnode which the default ip is 192.168.8.1
- WRTnode additional feature (all source opened github.com/WRTnode):
- Opencv 2.4.8
- Native gcc-mipsel on mt7620 and bin-utils
- Porting linino (Arduino yun) source to WRTnode
- Shine: fast fixed-point mp3 encoding
- And some WRTnode demo apps:
- opencv application demo
- mechanical control demo
- RESTful front-end demo and some other thing
Configure Linux compiled environment： Debian 5 Lenny:
apt-get install gawk ncurses-dev unzip zlib1g-dev
Debian 6 Squeeze:
apt-get install libncurses5-dev zlib1g-dev gawk flex libssl-dev sdcc-nf
Debian 7 Wheezy:
apt-get install libncurses5-dev zlib1g-dev gawk
Ubuntu 13.10:
sudo apt-get install build-essential subversion git-core libncurses5-dev zlib1g-dev gawk flex quilt xsltproc
Ubuntu 12.04LTS:
sudo apt-get install build-essential subversion git-core libncurses5-dev zlib1g-dev gawk flex quilt libssl-dev xsltproc libxml-parser-perl mercurial bzr ecj cvs unzip
Ubuntu 64bit:
sudo apt-get install build-essential subversion libncurses5-dev zlib1g-dev gawk gcc-multilib flex git-core gettext
Fedora 17:
yum install -y subversion binutils bzip2 gcc gcc-c++ gawk gettext flex libz-dev flex ncurses-devel zlib-devel make patch unzip perl-ExtUtils-MakeMaker
Fedora 18 – 64Bit (Maybe also for lower versions, some packages seem to be missing above):
yum install -y subversion binutils bzip2 gcc gcc-c++ gawk gettext flex ncurses-devel zlib-devel make patch unzip perl-ExtUtils-MakeMaker
glibc glibc-devel glibc-static quilt ncurses-lib sed sdcc intltool sharutils bison
Maybe you need glibc.i686 glibc-static.i686 glibc-devel.i686 libgcc.i686 too Fedora 19 – 64Bit (Maybe also for lower versions, some packages seem to be missing above):
yum install -y subversion binutils bzip2 gcc gcc-c++ gawk gettext flex ncurses-devel zlib-devel make patch unzip perl-ExtUtils-MakeMaker glibc glibc-devel glibc-static quilt ncurses-lib sed sdcc intltool sharutils bison wget
openSuSE 11.1
zypper install binutils bzip2 gawk gcc gcc-c++ gettext make ncurses-devel patch unzip wget zlib-devel flex git-core
In openSuSE some packages require additional repositories. Search on http://packages.opensuse-community.org and add repositories like that: zypper ar "http://download.opensuse.org/repositories/devel:/languages:/perl/openSUSE_11.1/devel:languages:perl.repo"
Arch Linux
pacman -S --needed subversion asciidoc bash bc binutils bzip2 fastjar flex git gcc util-linux gawk intltool zlib make cdrkit ncurses openssl patch perl-extutils-makemaker rsync sdcc unzip wget gettext libxslt zlib boost libusb bin86 sharutils b43-fwcutter findutils
Compile the firmware Build working directory:
$ mkdir OpenWrt $ cd OpenWrt
Download WRTnode SDK and turn it into the OpenWrt directory.
$ wget http://d.wrtnode.com/sdk/sdk.tar.bz2
unzip WRTnode SDK：
$ tar -jxvf sdk.tar.bz2 $ cd wrtnode
Enter compiled selection interface:
$ make menuconfig
Enter compiled selection interface, the current is WRTnode default configuration. If you need to add or remove certain parts can this configuration. After configured to save and exit. note:Do not update feeds and conduct svn update upgrades, we are ready to change.
Then began to compile
$ make V=s
The firmware is openwrt-ramips-mt7620n-wrtnode-squashfs-sysupgrade.bin(./bin/ramips/openwrt-ramips-mt7620n-wrtnode-squashfs-sysupgrade.bin). The factory firmware： http://d.wrtnode.com/old-firmware/openwrt-ramips-mt7620n-wrtnode-squashfs-sysupgrade.bin The corresponding toolchain：
