Howdy!
I bought a CR R3 in September and tweaked the .ino file a couple of times for personal preferences, last time in December. Since then I haven't updated any of the required libraries nor the IDE. On compiles last year everything went smoothly other than a few warnings.
Fast-forward to April: I saw you'd updated the file, and before changing anything I tried to recompile and upload my last revision. It's a no-go. The CR initially enumerates as a serial port, then when the IDE hits it with a reset to begin the upload the CR re-enumerates as a mass storage device and then eventually the IDE quits as it can't find the serial port any longer. It's definitely in bootloader mode as the LPF LED is slowly breathing. Whatever partial upload it gets from the IDE corrupts the CURRENT.EF2 file on the CR, but copying over the stored file recovers it.
Have I suddenly acquired Alzheimer's or something? I don't see anything I'm doing differently than I did in December, yet I'll be darned if I can get it to upload through the IDE now. I can copy the new v1.1.0 UF2 file over, but can't recompile with changes and upload.
The only change in my environment in the last 4 months was an update to the ESP8266 board files a couple of months ago, which maybe (or likely) changed the GCC version. I don't recall which 'programmer' I chose back last year for the CR, but none of the available options seems more likely than what I normally use, the AVRISP mkII. That's the only point not mentioned in the CR Guide.
Please, someone DO feel free to point out the error of my ways!
I've re-read through all of the 'Compiling from source' in the Guide (twice!), and the only difference is that I leave that 'update without asking' box unchecked. I only update manually, on purpose. I
hate surprises.
Here's the output from the IDE just as it disconnects and re-enumerates as mass storage:
"C:\\Users\\NOYB\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\arm-none-eabi-gcc\\7-2017q4/bin/arm-none-eabi-size" -A "D:\\Temp\\arduino_build_584593/CurrentRanger_R3.ino.elf"
Sketch uses 82652 bytes (32%) of program storage space. Maximum is 253952 bytes.
Forcing reset using 1200bps open/close on port COM17
PORTS {COM1, COM17, } / {COM1, COM17, } => {}
PORTS {COM1, COM17, } / {COM1, } => {} (It's dead, Jim)
PORTS {COM1, } / {COM1, } => {}
PORTS {COM1, } / {COM1, } => {}
