Thanks all! Upgraded to latest Arduino and Teensyduino. It all works as expected.
Unrelated to Teensy, I did realize I can not use MCP4151 or any other DigiPot I could find to replace an analog pot on a 3v-12v adjustable power voltage reg...
Thanks, guys. Sorry, to clarify, I am on Arduino 1.8.19
This is what I see in the verbose compile output:
Using library SPI at version 1.0 in folder: C:\Dev\arduino-1.8.19\hardware\teensy\avr\libraries\SPI
Just wanted to make sure the above...
Hi,
Trying to get an MCP4151 digital pot ((https://ww1.microchip.com/downloads/en/DeviceDoc/22060b.pdf) working with T4 to control a resistor on an adjustable voltage reg, thus making it programmatically settable.
6 hours of poking around...
Thanks again.
Works great on one PC, but the same exact T4 plugged into a different PC sends false positives. Out of 3 PCs I tried on, one is 100% stable (only see the ISR called when shorting the pin16 to GND) - on the other two PCs, once a few...