Forum Rule: Always post complete source code & details to reproduce any issue!

Search:

Type: Posts; User: MichaelMeissner

Page 1 of 10 1 2 3 4

Search: Search took 0.03 seconds; generated 7 minute(s) ago.

  1. Replies
    3,765
    Views
    389,135

    Note, I am a back-end person, and I only...

    Note, I am a back-end person, and I only minimally use C++ in the compiler code and Arduino/Teensy scripts. I don't know why the compiler is issuing the message. Sorry.

    On my Linux Fedora...
  2. Replies
    3,765
    Views
    389,135

    Yes, but I'm at work right now (with no Teensy...

    Yes, but I'm at work right now (with no Teensy stuff). I would need to recompile the code using the -save-temps=obj option to see what is really going on when I get home.
  3. Replies
    3
    Views
    144

    Hopefully this is fine as an offset of Telephone...

    Hopefully this is fine as an offset of Telephone Bill's post about the slide rule.

    As some of you know, I am in creating steampunk costumes (sometimes with Teensy).

    My current rig is a...
  4. Replies
    10
    Views
    111

    The prop shield and audio shields won't work...

    The prop shield and audio shields won't work together (the audio shield needs to switch some pins to their alternate usages, but the prop shield wants the pins in their normal usage). And there are...
  5. Replies
    3,765
    Views
    389,135

    I'm not sure if you are on the beta list, or just...

    I'm not sure if you are on the beta list, or just waiting for the T4 to be announced in public. There are two different sets of underneath pads on the T4. There are 10 pins that look to be spaced...
  6. Replies
    3,765
    Views
    389,135

    I realize this is premature until the T4 is...

    I realize this is premature until the T4 is actually announced, but does anybody have plans to make a carrier to access the bottom pins? Something like this board from FrankB?

    ...
  7. Replies
    3,765
    Views
    389,135

    Updated google table comparing Teensy 3.0, 3.1/3.2, 3.5, 3.6, and 4.0 processors

    I have gone through the pinout card, and I have added the basic's for the Teensy 4.0 to my large google document comparing the pinouts of the Teeny 3.0, 3.1/3.2, 3.5, 3.6, LC, and now 4.0. I still...
  8. Replies
    3,765
    Views
    389,135

    Now, that I'm slowly learning bits and pieces of...

    Now, that I'm slowly learning bits and pieces of the Teensy 4.0, and that we don't seem to have accelerated support for more than one CS, I'm wondering for the uncanny eyes, whether we would have...
  9. Replies
    3,765
    Views
    389,135

    Yes, after testing the pins, I settled on CS=10,...

    Yes, after testing the pins, I settled on CS=10, DC=15, RESET=18, MOSI=11 (but using pin #7 on the board, due to sound card using alt. MOSI), and SCLK=13 (but using pin #14). The two simple demo...
  10. Replies
    3,765
    Views
    389,135

    BTW, I was looking at some of my saved stuff on...

    BTW, I was looking at some of my saved stuff on ebay, and I recall seeing this display meant for the PI. It is a 128x128 TFT display (ST7735), but it has several buttons and a joystick if people...
  11. Replies
    3,765
    Views
    389,135

    Learn something new each day. I assumed all of...

    Learn something new each day. I assumed all of the pins were routed straight through. I have a similar program, and I will use it tonight to find the usable pins. Thanks.
  12. Replies
    3,765
    Views
    389,135

    Basically I removed the audio card, and use those...

    Basically I removed the audio card, and use those 2x14 set of pins to plug it in. Yes, the silk screen says different pins for SCLK, MOSI, etc (since the audio board uses the alternative pins in...
  13. Good. Are there special CS/DC pins in the Teensy...

    Good. Are there special CS/DC pins in the Teensy 4.0? I asked in the beta thread, but that is rather high volume.
  14. Replies
    3,765
    Views
    389,135

    Ok, I was able to try this out. Using both a New...

    Ok, I was able to try this out. Using both a New Haven 128x128 OLED display (NHD-1.5-128128ASC3) and the Adafruit 128x128 OLED display, I was not able to get anything displayed using the Teensy 4.0...
  15. Yes. Good catch. The original Arduino Uno had...

    Yes. Good catch. The original Arduino Uno had its I2C pins on A4/A5, and the Teensy adapted the same convention. Later Arduino boards put the I2C pins on other pins.
  16. Note, there are SPI devices that need tri-state...

    Note, there are SPI devices that need tri-state buffering when you have multiple devices on the same SPI bus.

    But the reasons for using the special 9 pins are a different issue. Normally you can...
  17. Replies
    3,765
    Views
    389,135

    My setup is somewhat weird, in that I have a perl...

    My setup is somewhat weird, in that I have a perl script to link stuff into /home/meissner/Arduino/libraries depending on various options. I may have linked to the wrong directory, so the file may...
  18. Replies
    6
    Views
    93

    At this point the Teensy 4 hardware is frozen,...

    At this point the Teensy 4 hardware is frozen, and it presumably will be officially announced in a bit (only Paul/Robin know precisely when). There will be extra pads underneath the Teensy 4 just...
  19. For 3.2/3.5/3.6, you can only have 4 displays for...

    For 3.2/3.5/3.6, you can only have 4 displays for the fast DMA control (you can have 5 fast ports, but you need both a DC and CS pin for the displays, you can share the DC pin but not the CS pin). ...
  20. Replies
    3,765
    Views
    389,135

    Hmmm, I downloaded it, and tried it on my system,...

    Hmmm, I downloaded it, and tried it on my system, and got:



    In file included from /home/meissner/Arduino/Tests/Oled/Oled_128x128_KurtE/Oled_128x128_KurtE.ino:3:0:...
  21. Replies
    6
    Views
    93

    This board was published some time ago (3-4 years...

    This board was published some time ago (3-4 years ago). It includes a PCB you can have oshpark make (3 boards for $2.60 for USA delivery), and then you solder in a USB-B board:


    ...
  22. Replies
    3,765
    Views
    389,135

    I can try it tonight when I get home. I'm...

    I can try it tonight when I get home.

    I'm wondering whether maybe the files should be renamed so that it can co-exist with the standard library from Adafruit. I.e. lets try to not repeat the...
  23. Replies
    3,765
    Views
    389,135

    I believe the SYNCPIN stuff was added to allow...

    I believe the SYNCPIN stuff was added to allow two HALLOWINGs to work together. The HALLOWING which is a M0, with a feather pinout and a builtin TFT 128x128 display:

    ...
  24. Replies
    3,765
    Views
    389,135

    I got my T4 beta 2 board today. I am using...

    I got my T4 beta 2 board today. I am using Arduino 1.8.8 along with 1.47 beta 4 Teensyduino. Here are some simple tests, I'm sure everybody has done.

    I tried the on/off switch and it seems to...
  25. Before getting to interrupts, it may be simpler...

    Before getting to interrupts, it may be simpler to first try it without low power stuff or interrupts.

    First try Examples -> Wire -> Scanner, load it, bring up the serial monitor, and run it. If...
  26. Replies
    5
    Views
    82

    On the 3.2, pins starting at 34: 34: A10...

    On the 3.2, pins starting at 34:

    34: A10 (inside through hole pin)
    35: A11 (inside through hole pin)
    36: A12 (underneath solder pad)
    37: A13 (underneath solder pad)
    38: Not a pin,...
  27. Replies
    3,765
    Views
    389,135

    FWIW, I don't (currently) have the Beta 2...

    FWIW, I don't (currently) have the Beta 2 hardware. I haven't tried it with the Beta 1 (since I assume it needs to be updated). I used Teensyduino 1.47 beta 4, Arduino 1.8.8.

    It is weird, I need...
  28. Replies
    3,765
    Views
    389,135

    Note, I've found the OLED displays are sensitive...

    Note, I've found the OLED displays are sensitive to the SPI bus speed, and different manufacturers seem to have different limits. My wavelan and newhaven displays can tolerate a 18,000,000 SPI, but...
  29. Replies
    14
    Views
    238

    I wonder whether using DMA will actually speed up...

    I wonder whether using DMA will actually speed up APA102 LEDs. But it would be useful to find out. I recalled there was an issue with APA102 leds going too fast, and I found this article from Paul...
  30. Replies
    3,765
    Views
    389,135

    I've been thinking of diving back into the T4...

    I've been thinking of diving back into the T4 arena. One of the things I have done with the Teensy in the past is run the Animated Eyes sketch on various Teensys:

    ...
  31. If you just want digital input or output, and...

    If you just want digital input or output, and don't need things like PWM support, you can get i2c boards like the MCP23017, which allows you to have 16 digital inputs or outputs per board. You can...
  32. You can use the pre-defined macro TEENSYDUINO,...

    You can use the pre-defined macro TEENSYDUINO, i.e.



    #if (TEENSYDUINO < 145)
    #error "You need at least Teensydunio 1.45 to build this module"
    #endif


    You can see what is defined by...
  33. I would say start out small. Get two displays....

    I would say start out small. Get two displays. You should be able to power them with the Teensy and start working on getting them to work. Then after they are working, you can tackle the issues...
  34. Note, I am a software guy, not a hardware guy. ...

    Note, I am a software guy, not a hardware guy. So if any h/w types pipe up, believe them and not me.

    In general, there are several ways to power your project, which needs roughly 1 amp of power....
  35. You could use the dig-ole displays: OLED...

    You could use the dig-ole displays:

    OLED 160x120 or 96x64: http://www.digole.com/index.php?categoryID=207
    LCD, various sizes: http://www.digole.com/index.php?categoryID=208
    Manual:...
  36. I just got mail that there is a new version of...

    I just got mail that there is a new version of the Gamedunio display, the 3x with 4.3" (480x272) and 7" (800x480) versions, using the BT815 chipset (the Gamedunion 3 used a FT810 EVE chip) that...
  37. Note, that most i2c device libraries only talk to...

    Note, that most i2c device libraries only talk to the first i2c device (Wire), which is on pins 19 (SCL) and 18 (SDA). If the library doesn't have support for alternate i2c buses, you will either...
  38. I'll let somebody else answer the hard questions....

    I'll let somebody else answer the hard questions. There are several solutions for accessing the underneath pins:


    ...
  39. One thing to think about is how the display is...

    One thing to think about is how the display is going to be used. How big do you need it to be, and will you need touch screen support?

    If it will be used outdoors where people wear polarized...
  40. Or an alternative solution is to solder a wire to...

    Or an alternative solution is to solder a wire to one of the pads underneath the Teensy 3.2.

    Another alternative solution is to move up to a Teensy 3.5 or 3.6 that gives you more pins brought out...
  41. If you are concerned about the height of the...

    If you are concerned about the height of the headers, you can solder a Teensy 3.2 with right angle headers and use jumper wires to connect the teensy (assuming you have a teensy without headers). ...
  42. Replies
    4
    Views
    297

    If you wanted to compare Teensy's at the Arduino...

    If you wanted to compare Teensy's at the Arduino pin level (rather than the internal level), I created the following google spreadsheet that tries to compare the Teensy 3.0, 3.1/3.2, 3.5, 3.6, and LC...
  43. Note of course if you have a packed structure,...

    Note of course if you have a packed structure, depending on the machine, the code to access the structure elements may be horrible.

    I've seen some machines that would do the equivalent of memcpy...
  44. Replies
    8
    Views
    378

    From an ISO C (and C++) standards point of view,...

    From an ISO C (and C++) standards point of view, your single line of code is indeterminate because you have side effects within the statement that can be done in multiple ways. The end of the...
  45. Well another way is to use cheaper microprocessor...

    Well another way is to use cheaper microprocessor (Teensy LC perhaps) to drive a smaller number of screens. You would write a protocol that just puts out the minimum information from the 3.6, and...
  46. Unfortunately, I haven't delved into the graphics...

    Unfortunately, I haven't delved into the graphics part. I tend to mostly just spit out text.
  47. I really depends on how much you want to dig into...

    I really depends on how much you want to dig into the code.

    Depending on the actual device speeds and how long your wires are, you might be able to bump up the I2C speed. The default speed is 100...
  48. FWIW, Adafruit has recently come out with a...

    FWIW, Adafruit has recently come out with a series of e-ink displays that have a flash memory controller along with the display. This means you don't have to dedicate a large chunk of SRAM to...
  49. Have you investigated whether the Teensy already...

    Have you investigated whether the Teensy already has what you want? Perhaps there isn't an Arduino method to do what you want, but you do have access to the raw machine.

    In terms of relays, you...
  50. Replies
    3,765
    Views
    389,135

    Sure that would be useful.

    Sure that would be useful.
Results 1 to 50 of 499
Page 1 of 10 1 2 3 4