Calculating distance ?

[RixtronixLAB]

Dear Member,

I want to calculate distance I have traveled,

I saw variables as

#define WHEEL_CIRCUMFERENCE         2070                                                            /**< Bike wheel circumference [mm] */

static uint32_t calculate_speed(int32_t rev_cnt, int32_t evt_time)

distance = rev_cnt * (WHEEL_CIRCUMFERENCE/1000); //divide by 1000 for per metre

but the output doesn't make sense

nfo> app: Computed distance value: 52052 m
                         

any clues ? Do I need to add any coefficient ? which coefficient ?

is this variable BSC_PROFILE_speed_rev_count equal to wheel rotation speed ?

thanks

[Vidar Berg]

Hello,

The distance function looks to be correct, so I think 'rev_cnt ' must be wrong.

[RixtronixLAB]

You mean, I use Garmin device to check the distance and compare with the code ? thanks

[RixtronixLAB]

Is  m_speed_calc_data.acc_rev_cnt  += rev_cnt - m_speed_calc_data.prev_rev_cnt; equal to this ?