Forum Rule: Always post complete source code & details to reproduce any issue!
Tab Content
  • johnwatterson's Avatar
    12-11-2018, 10:48 PM
    Studio shot of image on laptop and image on led panel.
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    12-10-2018, 10:09 PM
    What is the best way to show you the images? On my phone now - maybe transfer to email and upload from there?
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    12-10-2018, 08:32 PM
    OK, I read the data-sheet for WS2812B leds (GRB) that I am using and saw your comment at the bottom so thought that may be the main problem. Really just trial and error since I know what it suppose to look like. Turns...
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    12-08-2018, 08:48 PM
    Started over -looks like the program is working. Thank you so much. Unfortunately the colors are way off. Does not look much like the real bit map. I will work on it and post a couple of pictures so you can see the...
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    12-07-2018, 09:51 PM
    Great all the leds are lit. Where do I put my bitmap file name or do I create a varible filename = "RONION.bmp"; I thought it went in place of bpmDraw("test.bmp") but got a teensy error without explanation.
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    12-07-2018, 05:27 PM
    Great - I love your spirit of helping out a beginning programmer. Believe me this support is just what I needed to encourage me to explore the new hardware and software that people around the world are using these days....
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    12-06-2018, 02:09 PM
    Whenever it is convenient for you. I will certain keep working on the details myself as I said - big learning curve here using all the new components hardware and software. Thanks again for your assistance.
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    12-05-2018, 07:45 PM
    Yes, you are absolutely right. Probably learn more about coding doing this trouble-shooting problem than any other one thing I could do. And for sure this will open a big vat of chocolate for the future. This is the...
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    12-04-2018, 11:24 PM
    Started over and Morton's program is working. So far unable to get the teensy to light more than one string (432 leds) on pin 2.
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    12-04-2018, 08:49 PM
    Thank you - you guys are away above my head. It will take me some time to go through this stuff. I am wondering if it is worth the time it takes for me to figure it out even with your expert help. Simply I am making a...
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    12-03-2018, 09:34 PM
    My mistake. I am getting all the way down to the line - rowSize=(bmp*3+3) & ~3; then I am getting three cols of 72 lines on the serial monitor but no bitmap display on the LEDs. So far I have not found a debug_t3 file...
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    12-02-2018, 02:35 PM
    Yes, thank you much.
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    12-01-2018, 07:11 PM
    Great - let me ask you - since I am using SPI.h without pin definitions - will the teensy -Octows2811 combination understand? It looks like I am never getting to the buffer load. For example, I do not see the three...
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    11-30-2018, 10:28 PM
    OK, I have a program that writes to all the Leds in my 72 cols by 48 rows panel using 3.5 Teensy/Octows2811 and Mortonkopf's program for reading a bitmap file from the SD card on 3.5. However the BMP file does not write...
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    11-29-2018, 09:52 PM
    Thanks for your suggestions, OK, I will start on that path - make sure I can light the leds with Octows2811 library, then read the Bitmap from the SD card into a pixel map in memory and do a single pixel write to the...
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    11-28-2018, 09:54 PM
    Multi-platform Parallel output If you are using a due or a digix or a teensy 3 or a teensy 3.1, FastLED now has some new parallel output controllers that will allow you to drive 8 lines of WS2812 strips in parallel....
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    11-28-2018, 09:50 PM
    It looks like your program did read the SD file and size it. It could not draw it to the leds because of the pin 2 problem. I did see the FastLED has a parallel program function but I do not know how to use it in this...
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    11-28-2018, 09:45 PM
    Using math functions probably makes the most sense in terms of drawing.
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    11-28-2018, 09:42 PM
    My original idea was to paint the existing bitmap picture to the display after sending some text saying this is a painting. That means I need to load your program to on the SD card with a file for drawing the text and...
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    11-28-2018, 07:02 PM
    Thank you once again. My setup is 432 leds per-strip times 8 OctoWS2811 leds for atotal of 3456 leds. My bitmap is cols 72 times rows 48 - this should work - yes?
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    11-27-2018, 10:00 PM
    Thank you, Now the hardware initalizes, but lights only the leds on pin 2 of the teensy instead of the 8 by 432 that I expect. I did try some changes like NUM_LEDS NUM_STRIP and TOTAL_LEDS but no change. Here is the...
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    11-27-2018, 08:42 PM
    Still working on this project. Morton Kopf helped me find his Site and Code. His code uses BUILTIN_SDCARD FOR THE ChipSelect PIN but the compiler complains - 'BUILTIN_CARD' was not declared in this scope: In file...
    35 replies | 634 view(s)
  • johnwatterson's Avatar
    11-24-2018, 08:24 PM
    It is good have work. I will follow your suggestions and maybe "things" will work out. I will get started on Monday. I certainly do appreciate the help. You are obviously very talented. Good Work!
    7 replies | 142 view(s)
  • johnwatterson's Avatar
    11-24-2018, 05:30 PM
    Thanks, you are very helpful and your work is outstanding. I could use your support and am willing to pay you. What I have in mind is paying you for helping me with this project - like a flat fee. It looks like you have...
    7 replies | 142 view(s)
  • johnwatterson's Avatar
    11-24-2018, 02:28 PM
    Impressive work. I need to work through you code. Obviously I have a lot to learn. Would be willing to help me directly if I need it?
    7 replies | 142 view(s)
  • johnwatterson's Avatar
    11-24-2018, 01:50 PM
    Thank you for your help. No, I did not use BUILTIN_SDCARD, I just used the SD test file to see if I could communicate. While I have been working on this for a while I did not notice this function. Is there a list of...
    7 replies | 142 view(s)
  • johnwatterson's Avatar
    11-24-2018, 01:23 AM
    Led Art project using Bitmap and teensy 3.2 Good morning all, Need some guidance on this art project - In essences, the project involves projecting an existing BitMap image to the teensy-WS2912B panel The panel...
    7 replies | 142 view(s)
  • johnwatterson's Avatar
    10-23-2018, 06:49 PM
    Good morning all, Need some guidance on this art project - In essences, the project involves projecting an exiting image to the teensy-WS2912B panel for one minute and then stopping until restarted. The panel is 432 by...
    0 replies | 127 view(s)
No More Results
About johnwatterson

Basic Information

About johnwatterson
Biography:
Computer degree in Information Systems, but from the 1990s.
Art Degrees from the 1970s.
PASCAL plus FORTRAN,etc programing classes but never worked as a programmer.
Location:
El Paso, TX
Interests:
ART and LEDs for Art.
Occupation:
Retired Computer Specialists-Art Instructor

Statistics


Total Posts
Total Posts
59
Posts Per Day
0.37
Last Post
Bitmap with Teensy3.5 12-11-2018 10:48 PM
General Information
Last Activity
12-11-2018 10:48 PM
Join Date
07-07-2018