ulisp-nano.ino is too big for ATmega328P with bootloader
dragoncoder047 opened this issue · comments
Sketch uses 32644 bytes (101%) of program storage space. Maximum is 32256 bytes.
Global variables use 1536 bytes (75%) of dynamic memory, leaving 512 bytes for local variables. Maximum is 2048 bytes.
Sketch too big; see http://www.arduino.cc/en/Guide/Troubleshooting#size for tips on reducing it.
Error compiling for board Arduino Uno.
I had to manually delete some code (I got rid of the saveimage/loadimage functions) to be able to run the tests in technoblogy/ulisp-esp#75 (comment).
I'm puzzled because I tested it on an Arduino Uno. Which version of uLisp is it? What platform are you on - Arduino IDE version and OS?
Arduino 1.8.13 on a raspberry pi, and it's literally a stock Arduino Uno R3. I just copypasted the entire ulisp-nano.ino from the repository into a new sketch.
If I was able to program it using ISP (sans bootloader), that would give me an extra 512 bytes, and it would fit. Shucks.
When I upload uLisp AVR-Nano Release 4.4b on Arduino IDE 1.8.19 on my Mac, via the bootloader, I get:
Sketch uses 32244 bytes (99%) of program storage space. Maximum is 32256 bytes.
Global variables use 1536 bytes (75%) of dynamic memory, leaving 512 bytes for local variables. Maximum is 2048 bytes.
So I suppose it must be a platform difference. You'll just have to comment out some function you don't need.
That's funny. The Arduino IDE says my "Arduino AVR Boards" package is up-to-date. Apparently it isn't.
The difference between yours and mine is 400 bytes. I wonder what could be causing that. Perhaps different compiler optimisation setting?
My guess is between 1.8.13 and 1.8.19, avr-gcc had an update.
For boards where fitting in flash is a concern, I think #pragma GCC optimize ("Os") might help since you can't specify compiler flags in Arduino.