Lars Jeppesen

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  • in reply to: Usage of PlaySoundFile() #5494
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    Lars Jeppesen
    Keymaster

    Hi,

    I don’t think you do anything wrong. There is a known problem with the sound playback.
    Hopefully we will get it fixed soon.

    Best regards
    Lars

    in reply to: Can I change LcdConsole font size? #5492
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    Lars Jeppesen
    Keymaster

    Hi Bernhard,

    Thanks, I’m glad you can use it.

    No, you can’t change the font size. The firmware includes two bitmap fonts, that I have converted from a TTF font. I haven’t released the tool, because it requires several tweaks in order to work correctly.
    If you are interested I could upload the tool, but it might require some work in order to get a good result.

    Best regards
    Lars

    in reply to: Audio playback #5486
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    Lars Jeppesen
    Keymaster

    Hi,

    This is a bit embarrassing, because this have been a problem for a long time.
    There is something wrong with the playback.
    It is properly a minor detail, but I haven’t had the time to look into it.

    Best regards
    Lars

    in reply to: Using Netgear N150 WNA1000M (micro) WLAN USB Adapter #5201
    Author Image
    Lars Jeppesen
    Keymaster

    Hi Frank,

    Unfortunately this adapters appears to use a chipset that isn’t supported by the drivers currently included.
    It also seems that it doesn’t work on the Lejos (Java for EV3), but it might have been fixed in their newest release.
    If you want you could try and see if you can get it to work with the newest Lejos release.
    If that is the case I might be able to port the driver to the MonoBrick image.

    Best regards
    Lars

    in reply to: Building image > 4Gb #4402
    Author Image
    Lars Jeppesen
    Keymaster

    Hi,

    The best way is to clone the repository at https://github.com/Larsjep/monoev3image
    Then run these 3 scripts:

    ./format_sdcard.sh
    ./update_sdcard.sh /mnt
    ./make_ev3lib.sh /mnt

    P.S. Remember that the 4GB image can be used on larger SD-cards, but only 4GB will be usable.

    Regards
    Lars

    • This reply was modified 8 years, 8 months ago by Author ImageLars Jeppesen.
    in reply to: memory specifications for Mono FW #4317
    Author Image
    Lars Jeppesen
    Keymaster

    Hi,

    I will try to answer your questions to my best knowledge.

    The reason for the different image sizes is that the image contains the complete SD card, including the partition table.
    This means that we have to decide the sizes of the partitions when we make the image.
    The image contains 2 partitions. 1 FAT of 50MB and the rest is an EXT3 partition.
    If you write the 2GB image to a 16GB flash card you will still have an 50MB FAT partition and a (2GB-50MB) EXT3 partiton.
    The rest 14GB of the SD card will not be allocated.
    If you want to have use all of a 16GB it is possible to make the image directly from the source (https://github.com/Larsjep/monoev3image)

    – static stored data like several stored programs, accessory data files like look-up tables or init~ or log files (flash)

    Depends on the size of the EXT3 partition. Linux and the Mono runtime takes about 400MB.

    – actively executable program code (RAM, possibly flash)

    When the system is started it uses about 24MB af RAM. The EV3 has 64MB ram, so this leaves apx. 40MB for your programs.
    This can be extended by creating a swap file, but this will be very slow.

    – is the memory for an executable program organized by stack and heap?

    Yes internally. But the mono runtime will take care of this for you.

    – usable static memory for variables (RAM, possibly flash)

    – usable dynamically allocated memory for variables (RAM, possibly flash)

    The memory space for variables, dynamically allocated and executable code is the same. See previous answer.

    – how much of the available memory (flash and RAM) is used by Linux OS ?

    Around 24MB of the 64MB available.

    – how much of the available memory (flash and RAM) is used by the .net VM ?

    Sorry, but I have no idea.

    Regards
    Lars

    • This reply was modified 8 years, 8 months ago by Author ImageLars Jeppesen.
    in reply to: Access to EV3 without WiFi? #4118
    Author Image
    Lars Jeppesen
    Keymaster

    Sorry, but there haven’t been much progress lately. I have been busy, but it is on the top of my list.
    Hopefully I will get time to look at it soon.

    Best regards
    Lars

    in reply to: Brick-Simulator? #3896
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    Lars Jeppesen
    Keymaster

    Hi Martin,

    My advice is to make one instance of the display and pass the to your screen handling routines.
    If you like you can put it in a singleton, but we don’t plan to put it in a singleton in the firmware.

    Regards
    Lars

    in reply to: Updating/merging LeJOS 0.5.0-alpha #3817
    Author Image
    Lars Jeppesen
    Keymaster

    Hi,

    Yes, we are planing to update to the new LeJOS image, also in order to get USB Ethernet support.
    But we don’t currently have any plans to merge the two images.

    PS. I wasn’t aware of this Microsoft API, we will look into that.

    Regards
    Lars

    in reply to: Access to EV3 without WiFi? #3654
    Author Image
    Lars Jeppesen
    Keymaster

    Hi Martin,

    I’m glad you like our work 🙂
    But we don’t have anyway to get the programs on the EV3, when it’s running, besides using Wifi.
    We are planning for USB/Bluetooth support but haven’t done anything yet.

    Best regards
    Lars

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