convert two analogue pulses (5000/second) for display on HDMI or Composite Video

[JonW]

I did have a look, and nothing like this exists; there are PC-based emulators, but no true hardware emulators with HDMI. I'm not sure how many I would sell for the effort, and I would have to make it secure so I didn't get ripped off. I would have to design a new FPGA board without using the Sipeed development board, as programming the onboard flash is VERY hit-or-miss due to the poor Chinese-made/copy FTDI device, which misses commands and has terrible JTAG timing.  Plus, the Gowin parts are not easy to get hold of at a low price; I will check, though.

I have just knocked out a quick 27Q43 dev board this morning. I am using this part in more projects, so I thought it's probably worth doing one. It should connect directly to the FPGA, as with an SPI OLED; with the inbuilt VHDL SPI test sequence, the OLED should image the HDMI without an MCU present; a great way of proving if I have captured the full SD1306 command set.  Whacked on an encoder (with caps this time).  Hmm, maybe I should have done an Alps joystick...

Once I have them, I'll send you the Dev and a programmed FPGA, so you can do some funky code on a large screen!