HOWTO: Store Projects settings (like F_CPU, USB, Keyboard-layout)

[Frank B]

Nice to see you too

[Frank B]

Platform.txt for Arduino 1.8.7

[Frank B]

Platform.txt for Arduino 1.8.8

[defragster]

Just posted this here Overriding-Core-defines with an updated platform.txt below that worked for two of us.

Confirmed '-Ucatfood' versus '-Dcatfood' in defs.h triggers this or not in the sketch:

void setup() {
  Serial.begin(9600);
  while ( !Serial && millis()<3000 );
#ifdef catfood
      Serial.println("Found catfood");
#endif
}

>> That is -U to Undefine or -D to Define the 'catfood'


Also looking at : ...\hardware\teensy\avr\cores\teensy4\HardwareSeri al1.cpp::

#ifndef SERIAL1_TX_BUFFER_SIZE
#define SERIAL1_TX_BUFFER_SIZE     64 // number of outgoing bytes to buffer
#endif
#ifndef SERIAL1_RX_BUFFER_SIZE
#define SERIAL1_RX_BUFFER_SIZE     64 // number of incoming bytes to buffer
#endif
#define IRQ_PRIORITY  64  // 0 = highest priority, 255 = lowest

>> With code like this the -U to undefine isn't needed - other values that are defined need a -U before a new -D

And here is the file in use:

Attachment 17521

Frank B : hope you see this and it looks right

[microderm]

Just to clarify, I tested it on Mac. This is for version 1.8.9 of the IDE. Not yet tested on T4. Just starting to solder pins and SPI2 for underside of T4 board.

[microderm]

My tests involved using the following settings in defs.h:

-DSERIAL1_RX_BUFFER_SIZE=345
-DSERIAL1_TX_BUFFER_SIZE=123
-DF_CPU=144000000

The test code was simply:

void setup() {
  Serial.begin(115200);
  elapsedMillis waiting;
  while (!Serial && waiting < 1000) {} // Wait for output //
  Serial.print("*** init ***");
  
  #ifdef SERIAL1_RX_BUFFER_SIZE
    Serial.print("SERIAL1_RX_BUFFER_SIZE: " + String(SERIAL1_RX_BUFFER_SIZE));
  #endif
  #ifdef SERIAL1_TX_BUFFER_SIZE
    Serial.print("SERIAL1_TX_BUFFER_SIZE: " + String(SERIAL1_TX_BUFFER_SIZE));
  #endif
  #ifdef F_CPU
    Serial.print("F_CPU: " + String(F_CPU));
  #endif
}

Tested on Mac platform using T3.6 and T4. Both responded with the correct values output.

Next, I tried to verify a different project, not using the defs.h key-value file and got errors. It made me think that the bash script was not working, it's function being to create the file if not present. I checked the platform.txt file above and found the macosx line was commented out! Removing the # comment fixed it, and now projects can be build whether or not they have an associated defs.h file or not. Yay! See attached:platform.txt

I think this solution is amazing and I'm surprised it has so few takers. I can only think that folks don't realise how simple-to-use and powerful it really is.

Many thanks @Frank B for building a project-level override for system settings.

[microderm]

For the record, on the Mac, the platform.txt file is the one that lives at: Arduino.app/Contents/Java/hardware/teensy/avr/platform.txt