Or it will be one of the Due I have in the drawers.

I just need a SPI handler for the Roger's core. Seriously ? Nobody knows about a working Roger's Core SPI slave example ? I'm so near from displaying Marlin on a 7' touch screen along with OctoPrint. Too slow, and not enough room for the ring buffer. But it will never be able to decode and display. The SPI slave also runs on a Nano, as I couldn't get a STM32 working example for a SPI ISR.Īlso tested a Nano as VGA adapter : works fine for PAL / 128圆4 on the 7' 52Pi display. The SPI master runs u8glib (as does Marlin) on a Nano. I can now display an image I capture from the SPI bus. Switching the u8glib driver from ST7920 to SSD1306 made things much easier (encoding is more straightforward). Been stuck for 3 days reading on the web, learning nothing.

Only brains are missing : don't know how and where to start. Obviously, I've a logic analyser, a scope, Visual Micro (payed version), a ST Link (and another one that will soon become a Black Magic Probe). I'm looking for a starting point : tutorial + slave example (with the Roger's core), so I can learn about how to receive data from a SPI master (the printer motherboard, configured for the ST7920). Want to switch between Marlin and OctoPrint on a 7' touch LCD (HDMI, VGA, composite). I tried Cube 2 times, I gave up 2 times ! I can't navigate in the sources and it is unreadable because of the quantity of files and folders (it's part of a whole controller with GUI and a dual display (Marlin + BTT GUI). Unfortunately, it seems to me it was written with Cube. I found only one open sourced ST7920 emulator, on the BigTreeTech Git it outputs to a color TFT.įor now, it is mostly about reading data formatted for this ubicuitous 128圆4 monochrome LCD.

I'd like to build a ST7920 emulator that outputs a VGA or composite signal.

Arduino emulator mac tft