Just starting to learn these things. Does anyone have examples of code for inserting bitmaps and animations like a fuel gauge for example? I am using a 1306 OLED display. Thank you in advance.
wayland/ssd1306-oled-i2c — XOD has an example for displaying logo (which I assume is from an image file of some sort) that might help you. You might want to display background gauge, then draw rectangle or line to show current value rather than have multiple images.
Thanks, that’s what I was thinking of doing with the gauge. Just have no idea on how to make the needle move. Do I need to make a needle for each incremental position and turn them on individually at a certain analog level?
Upon investigating the XOD Logo in the example, I don’t see it as an image file. When I click on the documentation for it, it shows up as the C++ code used to create the image. I don’t think there is a node that allows the import of a bitmap, at least from what I can see.
Sorry, looks like you are probably right. I don’t have the hardware, so I didn’t bother to download the library to view the code. You might be able to use the same idea as logo code to draw your gauge. For the gauge indicator, you can just draw a line in the appropriate location. To update, you will need to erase (or over-write with background color) the old line, then draw a new one. This will be a lot easier if the line never covers any part of the gauge background so it doesn’t get erased (or clear display, draw background, then draw indicator each time…)
If you opened the code of the XOD-logo node, you should have noticed that there is a byte array in which the image is encrypted. On this site you can convert images from the “.png” format to a byte array: Convert picture to C code array
If necessary, I can explain in more detail how to work with this site, and how to edit the xod-logo node for your own needs.
Here are detailed instructions with an example from me.
example.pdf (947.5 KB)
Thank you so much for your help. I will give it a shot.
Thank you so much. Now I need to has out the moving needle. I’ll try gweimer’s suggestions.