Tom's Life Bits

GCC access of program memory space isn't as transparent as other compilers. You need to use the pgm_read_word command, as stated in the AVRLibC manual (see page 19 of the latest one). Example (untested):

Code: #include <avr/io.h> #include <avr/progmem.h> int thermistor[] PROGMEM = { 653, 545…-94,-107}; there are 1024 values int thermistor_f (int adc) { return(pgm_read_word(&thermistor[adc])); }