I'm about to resurrect a project I started on 3 or 4 years ago and abandoned (health issues, other priorities) a couple of years ago. Meanwhile, supply-chain issues mean that the original target, Teensy 3.6, seems unavailable so I am changing to 4.1 (no ethernet needed).
I'm aware of some pin assignment differences, which seem easy to accommodate. The power draw from Teensy 4.1 worries me a bit, though I hope to drop the clock down to mitigate that. The memory layout seems a bit more complicated but also seems to be mainly handled automatically by the compiler. I see that the onboard ADC has a lower ENOB but I think that 10 bit will be fine in this application. Anything else I should be aware of?
In case it helps, the project will include:
I'm aware of some pin assignment differences, which seem easy to accommodate. The power draw from Teensy 4.1 worries me a bit, though I hope to drop the clock down to mitigate that. The memory layout seems a bit more complicated but also seems to be mainly handled automatically by the compiler. I see that the onboard ADC has a lower ENOB but I think that 10 bit will be fine in this application. Anything else I should be aware of?
In case it helps, the project will include:
- Two SPI 18-bit DACs (AD5781ARUZ) and a Vref (MAX6226_50)
- Two 14-bit octal SPI DACS (DAC8168C, with 74AHCT125 for level shifting)
- FreqMeasure and FreqCount (different pins, now)
- A few RGB LEDs
- A small screen plus encoder and some buttons. I2C, because it is mainly for setup and calibration
- Four pots connected to onboard ADC
- USB Host
