madeintheusb

Yes you can also visualize the I2C protocol the same way.

For the ADC it would be necessary to add 8 new LEDs connected to 8 op-amp, connected to each ADC. So not out of the box.

You are right though I do think HID is limited to 64 Kbytes/S. But an SAMD21 or 32U4 could allow me to build a cheaper product. I have to think about it now.

What I am currently achieving is

- 100Kbytes/S in I2C with a 10Mhz I2C EEPROM and - 2.4 Mbytes/S in SPI with a NOR FLASH at 103Mhz

using the FTDI FT4222 and the FT232H should the same or better.