Manipulation of Millis() value

after sanguino wakes 8 sec sleep, advance millis() value 8000. possible?

yes , no. no, if use standard arduino libraries. yes, if not mind patch them.

in hardware/cores/arduino/wiring.c

you find

code: [select]


volatile unsigned long timer0_overflow_count = 0;
volatile unsigned long timer0_millis = 0;
static unsigned char timer0_fract = 0;


and code advances them. can add function advance them on own demand. take care make advance function internally atomic. start like

code: [select]


uint8_t old_sreg = sreg;
cli();


and end like

code: [select]


sreg = old_sreg;
cli();


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