Return to Answer

Spelling mistake, 'deference' to 'dereference', this is important, as it's a keyword in this solution.

Source Link

edit approved Apr 1, 2015 at 14:54

aaa

2.7k
2
25
40

Try this:

long* lRaceStartTime = RaceHandler.lRaceStartTime;
long lRaceElapsedTime = micros() - *lRaceStartTime;

You assigned the pointer to lRaceStartTime on the first line, but on the second line you are subtracting the pointer from micros()micros() which returns an unsigned longunsigned long. You need to deferencedereference the pointer before subtracting. AlsoAlso you might consider making all your longs unsignedunsigned to match the return type of micros():micros() http://arduino.cc/en/reference/micros

Try this:

long* lRaceStartTime = RaceHandler.lRaceStartTime;
long lRaceElapsedTime = micros() - *lRaceStartTime;

You assigned the pointer to lRaceStartTime on the first line, but on the second line you are subtracting the pointer from micros() which returns an unsigned long. You need to deference the pointer before subtracting. Also you might consider making all your longs unsigned to match the return type of micros(): http://arduino.cc/en/reference/micros

Try this:

long* lRaceStartTime = RaceHandler.lRaceStartTime;
long lRaceElapsedTime = micros() - *lRaceStartTime;

You assigned the pointer to lRaceStartTime on the first line, but on the second line you are subtracting the pointer from micros() which returns an unsigned long. You need to dereference the pointer before subtracting. Also you might consider making all your longs unsigned to match the return type of micros() http://arduino.cc/en/reference/micros

Source Link

answered Mar 30, 2015 at 23:08

benathon

Try this:

long* lRaceStartTime = RaceHandler.lRaceStartTime;
long lRaceElapsedTime = micros() - *lRaceStartTime;