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Da Xue

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  1. Like
    Da Xue reacted to echo7394 in LePotato + OLED + luma.oled Python   
    Just wanted to show off a bit of awesomeness! (Please excuse the dust)
     

  2. Like
    Da Xue reacted to echo7394 in I2c Woes   
    Edit: problem solved with armbian-add-overlay i2c-b.dts
  3. Like
    Da Xue got a reaction from lanefu in Le Potato general topics   
    We are working with Amlogic and BayLibre to get to the root of the ethernet issues on mainline for Amlogic chips. We should have a resolution soon. One was caused by double poking a register in Designware's IP. There's a secondary issue we are looking into.
  4. Like
    Da Xue got a reaction from gounthar in Le Potato general topics   
    We are working with Amlogic and BayLibre to get to the root of the ethernet issues on mainline for Amlogic chips. We should have a resolution soon. One was caused by double poking a register in Designware's IP. There's a secondary issue we are looking into.
  5. Like
    Da Xue got a reaction from sfx2000 in Orange Pi Zero Plus2 H5 hardware oddity in VDD_CPUX power circuit   
    @tkaiser Allwinner only certifies the H3 to operate at 1008MHz @1.2V and H5 to operate at 1008MHz @ 1.1V with DDR clocks up to 672MHz. Designs and software support for adjustable voltage and higher clock rates must be validated by the third party that chooses to implementing such features.  DVFS will not be supported in the Allwinner H3/H5 BSPs since the transition to AXP8036. I have seen some small boards with 16-bit DDR3 (1 DDR chip) clocked at 744MHz but they are almost guaranteed to have memory errors and video playback issues.
  6. Like
    Da Xue got a reaction from Tido in Le Potato - writing armbian to eMMC   
    Neil finished u-boot UMS support for us. So, soon you will be able to flash the eMMC by exposing it as a mass storage device to your PC.
  7. Like
    Da Xue got a reaction from AndrewDB in Le Potato Serial Getty on ttys0 starts, stops restarts   
    I haven't played with Armbian but ttyS0 is only present on Amlogic's kernel. On mainline kernel, it should be ttyAML0. It could be that there's no such device and the tty service is restarting due to it.
  8. Like
    Da Xue reacted to JMCC in Librecomputer Renegade RK3328   
    So the Media Script is finally released:
     
  9. Like
    Da Xue got a reaction from PhracturedBlue in Top-Left USB port on Le Potato board crashes USB driver on 4.14   
    See https://github.com/libre-computer-project/libretech-linux/commit/9b6b181a0700b329876b7998eb75283ce0b338cc
     
    The previous USB patches that were posted to the libre-computer-project 4.14 branch were not the final ones.
     
    All of the out-of-tree patches for 4.14 can be found here: https://github.com/libre-computer-project/libretech-linux/commits/linux-4.14/libretech-cc-master
  10. Like
    Da Xue reacted to gounthar in ROC-RK3399-PC (Renegade Elite)   
    Tempting, very tempting...
    Edit: too tempting, booked one.
  11. Like
    Da Xue reacted to TonyMac32 in OV5640 driver   
    Sounds like ARM development summarized into 1 statement. 
  12. Like
    Da Xue got a reaction from tkaiser in ROC-RK3399-PC (Renegade Elite)   
    There's no plans for full size PCI-E cards because that is like Pandora's box in terms of customer issues. If 20V works, we could potentially design a mezzanine to drive PoE devices and act as a terminator for PoE camera system for computer vision applications.
  13. Like
    Da Xue got a reaction from tkaiser in ROC-RK3399-PC (Renegade Elite)   
    Native *speed*. Thanks for the catch. 5V and 12V works. Still trying to get 20V working.
  14. Like
    Da Xue reacted to mboehmer in Thanks for the fish!   
    Hi guys,
    some months ago I implemented an Odroid C2 as readout controller for a scientific instrument.
    Lot of people were kind and helped me with some problems with Armbian, especially eMMC and PWM.
     
    Today, finally, we managed to have our instrument (two strings with several Odroid C2 and other stuff) deployed.
    It is sitting now at 2628m depth in the Pacific Ocean, and will go operational the next days.
     
    Here we are... I think I can announce the deepest Odroid so far (cry loud if I'm wrong :) )
    In the picture you just can see the Titanium housing with two glass covers attached to the string.
     
    Again, thanks for the fish :)
     
    Michael

  15. Like
    Da Xue got a reaction from Igor_K in ROC-RK3399-PC (Renegade Elite)   
    Still being designed but photos attached. Big enough for you? @tkaiser 




  16. Like
    Da Xue got a reaction from TonyMac32 in ROC-RK3399-PC (Renegade Elite)   
    That basic design will be used on all 5W-20W power envelop solutions including the S905D2/X2 and S922. It is CNC milled but designed with mass production in mind. 
  17. Like
    Da Xue got a reaction from Moklev in ROC-RK3399-PC (Renegade Elite)   
    Still being designed but photos attached. Big enough for you? @tkaiser 




  18. Like
    Da Xue reacted to tkaiser in ROCK64: RAM overclock possible?   
    Care to report the instabilities you will now run into (before others find this thread and think this would be a great idea)?
     
    You could start with https://github.com/ehoutsma/StabilityTester but would need to adjust both MAXFREQUENCY and the REGULATOR_* variables first.
  19. Like
    Da Xue got a reaction from Tido in ROC-RK3399-PC (Renegade Elite)   
    Still being designed but photos attached. Big enough for you? @tkaiser 




  20. Like
    Da Xue got a reaction from Tido in Le Potato Wake/Power ON by IR Remote   
    @Tido It needs microcode for the Cortex M chip to support suspend and then a lot of software work to get out of it. It will be quite a while before that kind of work gets mainlined if at all.
  21. Like
    Da Xue reacted to sbc_chrisb in Le Potato GPIO pins on /sys   
    So, I still need to verify some of the later pins, going to work on that tomorrow with a bash walker loop while I swap wires on the header to an LED. This is yet another table that maps the 40 pins to libgpio, for reference. Maybe someone will find it useful. GC0 is gpiochip0 and GC1 is gpiochip1 in libgpio. 
     



     
    Quick bash variable list for importing into scripts, so you can just think in terms of header pins rather than the mappings.
     
    P01=NA P02=NA P03=0:5 P04=NA P05=0:4 P06=NA P07=1:98 P08=1:91 P09=NA P10=1:92 P11=0:8 P12=0:6 P13=0:9 P14=NA P15=1:100 P16=1:93 P17=NA P18=1:94 P19=1:87 P20=NA P21=1:88 P22=1:79 P23=1:90 P24=1:89 P25=NA P26=1:80 P27=1:75 P28=1:76 P29=1:96 P30=NA P31=1:97 P32=1:95 P33=1:85 P34=NA P35=1:86 P36=1:81 P37=1:84 P38=1:82 P39=NA P40=1:83  
    Example bash script:
     
    #!/bin/bash . pinheaders #This is the above variable list as a separate file print() { for i in {01..40}; do var=P${i} printf "Pin $i: ${!var}\n"; done } walk() { for i in {01..40}; do var=P${i} if [[ ! ${!var} = "NA" ]]; then chip=gpiochip$(echo ${!var} | cut -f1 -d:) pin=$(echo ${!var} | cut -f2 -d:) gpioset $chip ${pin}=1 sleep .5 gpioset $chip ${pin}=0 fi done }  
    You get the idea. If you're working with just pins 27 and 28 you can source the pinheader file, then use $P27 and $P28 to get the chip and pin from that variable.
     
    Hopefully this info is useful to someone searching the forum like I was.
  22. Like
    Da Xue got a reaction from chwe in Amlogic still cheating with clockspeeds   
    All of the benchmarks on libre.computer were ran on the standard bl30 from Amlogic's openlinux site.  The blob I have is for my testing only since using them and advertising the results is cheating.
  23. Like
    Da Xue got a reaction from balbes150 in Amlogic still cheating with clockspeeds   
    To be honest if they drive the chip at higher voltages like 1.3V like the Allwinner H3, I think they can hit 2GHz. However, power consumption, heat, and reliability become concerns. I think they originally tested at 2GHz and made all the marketing materials but had to scale back to make power consumption and other factors look pretty. Amlogic is pretty ahead of the curve in low cost quad-core A53 SoCs. We just started getting competitor chips last year which means Amlogic is almost 2 years ahead of the curve with S905.
  24. Like
    Da Xue got a reaction from chwe in Amlogic still cheating with clockspeeds   
    To be honest if they drive the chip at higher voltages like 1.3V like the Allwinner H3, I think they can hit 2GHz. However, power consumption, heat, and reliability become concerns. I think they originally tested at 2GHz and made all the marketing materials but had to scale back to make power consumption and other factors look pretty. Amlogic is pretty ahead of the curve in low cost quad-core A53 SoCs. We just started getting competitor chips last year which means Amlogic is almost 2 years ahead of the curve with S905.
  25. Like
    Da Xue got a reaction from chwe in Orange Pi Zero Plus2 H5 hardware oddity in VDD_CPUX power circuit   
    @tkaiser Allwinner only certifies the H3 to operate at 1008MHz @1.2V and H5 to operate at 1008MHz @ 1.1V with DDR clocks up to 672MHz. Designs and software support for adjustable voltage and higher clock rates must be validated by the third party that chooses to implementing such features.  DVFS will not be supported in the Allwinner H3/H5 BSPs since the transition to AXP8036. I have seen some small boards with 16-bit DDR3 (1 DDR chip) clocked at 744MHz but they are almost guaranteed to have memory errors and video playback issues.
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