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Pop Andrei Lucian

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Posts posted by Pop Andrei Lucian

    Core specifications

    in Beginners

    Posted

    Hello people,

     

     

    I am interested in designing a cooler for OPI Zero and OPI LIte.

     

    Next is the formula of calculus:

    image.png.a7a5f927808d1955889022d8bd2f562c.png

     

    I am NOT able  to find next parameters:

    T_Jmax = this is the DIE(microprocessor) wanted temperature ---> is this 30-40 degrees best temperature for OPI for well functioning in parameters?

    P_DMAX = power that is generated by the losses of OPI Zero board and OPI Lite board.

    Q_jc = thermal resistance between DIE(microcontroller) and case 

     

    Can please someone help? 

     

    Thanks.

     

    0

    H2+/H3 Initial GPIO values (at reset time)

    in Beginners

    Posted

    Hello,

     

    What do you mean by "drive strength can be changed per pin AFAIK" ??

    If you have 20-40 mA on each pin and you have 17 GPIOs + 2 dedicated 3.3V pins ==> 380mA - 760mA on all pins (H2+ of OPI Zero)

     

    I can see from schematic that there is only one step down circuit for 3.3V ==> that the GPIOs current is spited between this 19 pins.

     

    e.g. I can power 2 pins with 60 mA / each ==> I will have 260 mA left not used.

     

    Am I right?

    0

    H2+/H3 Initial GPIO values (at reset time)

    in Beginners

    Posted

    Hello,

     

    Sorry for late reply, I was on vacation for a while. 

    I do understand my idea is not feasible with OPI devices.

     

    During reset faze I will have all my LEDs connected to GPIOs with high impedance state (Z) => Not glowing.

    After reset I will run some batch script that will start my C/Python applications which will handle all the LEDs as wanted.

     

    Thank you for all the support!

     

    One short question. Do you know what is the maximum current driven from 3.3 V pins of OPI Zero or OPI Lite (GPIOs set as output or that two 3.3V dedicated pins)?

    0

    H2+/H3 Initial GPIO values (at reset time)

    in Beginners

    Posted

    Sorry for getting confused,

     

    with green is initial OPI Zero GPIO values at startUp (reset time)

     

    Under OPI Zero (H2+) it looks that 2 of this pins have both OUT HIGH (wPi pin 0)  and IN HIGH (wPi pin 9)

    Is there a datasheet present in order to check values from test with H2+ datasheet ones? (I see only fr H3)

    0

    H2+/H3 Initial GPIO values (at reset time)

    in Beginners

    Posted

    Hello,

     

    Thank you for fast notice.

    "Where did you found OPiLite 1.2 schematic?"

    Under official website: http://linux-sunxi.org/images/4/4b/Allwinner_H3_Datasheet_V1.2.pdf

    At page 68 it is stated that GPIOs PC3 and PC4 are "Default pulled up" (at reset time).

     

    Also, when I run gpio readall I get next output

    => That all are zero alue with different ALT function at reset time (with yellow in picture)

     

    Am I making something wrong?

    I want to trigger a LED when the micro controller is on reset faze and until the software loaded on the sd card did not started yet.

     

    " for almost any SoC are usually simple high impedance floating pins" --> under Raspberry Pi you have some GPIOs that are set as OUTPUT and PULLED-UP by default in order to specifically simulate this action.

     

    x.png

    0

    H2+/H3 Initial GPIO values (at reset time)

    in Beginners

    Posted

    Hello,

     

    I am talking strictly about GPIO's value and mode at reset.

    Under  "sudo gpio readall" of H3 core (OPI Lite) I can see that  ALL GPIO pins are 0V with different alternative mode functions.

    Under H3 core (OPI Lite) datasheet 1.2 says that value PC3 and PC4 GPIOs are pulled up?

    This are in contradiction!

     

    Did anyone measured the H3 core GPIOs value? Does H3 core has any pin of pulled-up mode during the reset time of the controller?

    Please help.

    0

    OPI ONE wireless success

    in Reviews, Tutorials, Hardware hacks

    Posted

    Hello,

     

    I am encountering problems when trying to setup AP on Opi Lite, using last Armbian update.

    I am using default wlan0 embedded wireless for default connection and Tenda W311MI (ra0) dongle for AP mode.

    I did configured everything in conformity with the post.

     

    Connection to internet via Router is working perfect using any whatever ra0 or wlan0.

    When trying to search for AP on my laptop, I do get an Hidden network; I tried to connect but with no result.

    I do see that ra0, used by me for AP, states Not-Associated.

     

    I am using only /etc/network/interfaces file because when I add wpa_supplicant.conf into interfaces config => None of the networks will start:

    Error (triggered when I execute ifup wlan0):

    wpa_supplicant: /sbin/wpa_supplicant daemon failed to start
    run-parts: /etc/network/if-pre-up.d/wpasupplicant exited with return code 1
    Failed to bring up wlan0  

     

    I did attached next relevant files:

    /etc/network/interfaces/

    ====================================================

    source /etc/network/interfaces.d/*

    ### Local loopback ###
    auto lo
    iface lo inet loopback

    ### WI-FI WAN Default Network setup ###
    auto wlan0
    allow-hotplug wlan0
    iface wlan0 inet static
      address 192.168.100.53
      netmask 255.255.255.0
      network 192.168.100.0
      broadcast 192.168.100.255
      gateway 192.168.100.1
      dns-nameservers 8.8.8.8 8.8.4.4

    wpa-ssid "DIGI-B3ED"
    wpa-key-mgmt WPA-PSK
    wpa-psk "P9XwDmuF"

    ### WI-FI WAN AP Network setup ###
    auto ra0
    allow-hotplug ra0
    iface ra0 inet static
      address 192.168.101.53
      netmask 255.255.255.0
      network 192.168.101.0
     

    sudo ifconfig

    ===========================

    lo        Link encap:Local Loopback
              inet addr:127.0.0.1  Mask:255.0.0.0
              inet6 addr: ::1/128 Scope:Host
              UP LOOPBACK RUNNING  MTU:16436  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:0
              RX bytes:0 (0.0 B )  TX bytes:0 (0.0 B )

    ra0       Link encap:Ethernet  HWaddr 50:2b:73:cc:58:66
              inet addr:192.168.101.53  Bcast:192.168.101.255  Mask:255.255.255.0
              inet6 addr: fe80::522b:73ff:fecc:5866/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:1983 errors:0 dropped:0 overruns:0 frame:0
              TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000
              RX bytes:277632 (271.1 KiB)  TX bytes:1456 (1.4 KiB)

    wlan0     Link encap:Ethernet  HWaddr 8a:92:73:b6:05:a1
              inet addr:192.168.100.53  Bcast:192.168.100.255  Mask:255.255.255.0
              inet6 addr: 2a02:2f08:4280:dcd:8892:73ff:feb6:5a1/64 Scope:Global
              inet6 addr: fe80::8892:73ff:feb6:5a1/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:1005 errors:0 dropped:469 overruns:0 frame:0
              TX packets:219 errors:0 dropped:1 overruns:0 carrier:0
              collisions:0 txqueuelen:1000
              RX bytes:259716 (253.6 KiB)  TX bytes:39941 (39.0 KiB)
     

     

    sudo iwconfig

    ===========================

    lo        no wireless extensions.

    ra0       Ralink STA  ESSID:"11n-AP"  Nickname:"MT7601STA"
              Mode:Auto  Frequency=2.412 GHz  Access Point: Not-Associated
              Bit Rate:1 Mb/s
              RTS thr:off   Fragment thr:off
              Encryption key:off
              Link Quality=10/100  Signal level:0 dBm  Noise level:0 dBm
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:0  Invalid misc:0   Missed beacon:0

    wlan0     IEEE 802.11bgn  ESSID:"DIGI-B3ED"  Nickname:"<WIFI@REALTEK>"
              Mode:Managed  Frequency:2.462 GHz  Access Point: 34:6A:C2:CB:FE:7C
              Bit Rate:72.2 Mb/s   Sensitivity:0/0
              Retry:off   RTS thr:off   Fragment thr:off
              Encryption key:****-****-****-****-****-****-****-****   Security mode:open
              Power Management:off
              Link Quality=86/100  Signal level=100/100  Noise level=0/100
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:0  Invalid misc:0   Missed beacon:0

     

    Can please someone help me?

    Thanks.

    0

    Set static IP in jessie server on orange pi one

    in Beginners

    Posted

    Hello,

     

    I am trying to setup my OPI Lite wi-fi connection with no success. (OPI Lite has only WiFi connection)

    I downloaded and installed Debian_jessie_default_3.4.113.

     

    I have updated /etc/network/interfaces with next:

    ### General setup - Local loopback
    auto lo
    iface lo inet loopback

    ### General setup - WI-FI WAN Network
    auto wlan0
    iface wlan0 inet static
      address 192.168.100.52
      netmask 255.255.255.0
      gateway 192.168.100.1
      dns-nameservers 8.8.8.8 8.8.4.4
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
     

     

    I have updated /etc/wpa_supplicant/wpa_supplicant.conf with next:

    ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
    update_config=1

    network={
            ssid="DIGI-B3ED"
            key_mgmt=WPA-PSK
            psk="P9XwDmuF"
    }

     

    Restarted device >> 

    lo gets:

    inet addr: 127.0.0.1
    UP LOOPBACK RUNNING

     

    wlan0 states:

    UP BRODCAST RUNNING MULTICAST with NO IP address

     

    When I run: sudo ifup wlan0, I get: 

    wpa_supplicant: /sbin/wpa_supplicant daemon failed to start
    run-parts: /etc/network/if-pre-up.d/wpasupplicant exited with return code 1
    Failed to bring up wlan0  

     

    Code is perfectly running on RaspberyPi2, OPI Zero but, NO OPI Lite !!

     

    Please someone help !

    Thank you.

     

    0

    UART on gpio pins Orange Pi Lite

    in Allwinner sunxi

    Posted

    Hello,

     

    Is UART I2C communication available via WiringPI or how do you manage to actually communicate with a device via I2C protocol using an OPI board and C language?

    I want to read data from an I2C sensor using C script. Did someone managed to do this? 

    Can you please tell me what can I try?

     

    Thanks.

    0

    Wifi Access Point

    in Allwinner sunxi

    Posted

    Hello Igor,

     

    Thanks for response. I will manage my software on OPI Lite + wifi dongle.

    H2+ core is being more buggier than H3 I think? What you say?

     

    At the moment on OPI Zero I have founded multiple barriers/problems ... solved in the end ...

    0

    Wifi Access Point

    in Allwinner sunxi

    Posted

    hello people,

     

    Is any OPI boards (OPI0 - terminated, Opi Lite or OPI One or any other else) being able for providing a decent wifi communication and AP with its own on-board wifi driver?

    I want to port my application, but as far as I got, OPI0 wifi is NOT trusted anymore ... so I would NOT use it like this even if I mostly get succeeded results. 

    Is OPI designed to work in a reasonable way only with a external USB Dongle ?

     

    Thanks.

    0

    Orange Pi Zero wireless AP

    in Orange Pi Zero

    Posted

    Hello friends,

     

    Does anyone created a working Ad-Hock network via Orange Pi Zero using default onboard network chip?
    Please help, I am getting stuck.

     

    I have tried configuring like this:

    source-directory /etc/network/interfaces.d
    auto wlan14
    iface wlan14 inet static
      address 192.168.1.1
      netmask 255.255.255.0
      wireless-channel 1
      wireless-essid Ad-HocNetwork
      wireless-mode ad-hoc
     
    Thanks in advance.
    0
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