CANopen timer

Functions
uint32_t	ComTmrCalcTicks (uint32_t ulReqTimingV)
uint32_t	ComTmrCalcTime (uint32_t ulTicksV)
void	ComTmrSetPeriod (uint32_t ulPeriodV)

Detailed Description

The are a number of CANopen services which require an internal timer (e.g. Heartbeat, timer-driven PDO). The timer values for these services are set in a multiple of 1 microsecond or 1 millisecond (depends on the service).

The requested time values are converted into timer ticks and vice versa with the functions ComTmrCalcTicks() and ComTmrCalcTime() respectively.

Function Documentation

ComTmrCalcTicks()

uint32_t ComTmrCalcTicks

(

uint32_t

ulReqTimingV

)

Calculate number of timer ticks.

Parameters

ulReqTimingV

- requested time in microseconds

Returns

number of required timer ticks

See also

ComTmrCalcTime()

The function calculates the number of required timer ticks (i.e. timer interrupts) based on the required time ulReqTimingV (in microseconds) and the internal timer period (see ComTmrSetPeriod()).

ComTmrCalcTime()

uint32_t ComTmrCalcTime

(

uint32_t

ulTicksV

)

Calculate time based on timer ticks.

Parameters

ulTicksV

- number of timer ticks

Returns

time in microseconds

See also

ComTmrCalcTicks()

The function calculates the time (in microseconds) based on the given number of timer ticks and the internal timer period (see ComTmrSetPeriod()).

ComTmrSetPeriod()

void ComTmrSetPeriod

(

uint32_t

ulPeriodV

)

Configure timer period.

Parameters

ulPeriodV

- number of timer ticks

The function sets the timer period which is used to call the function ComMgrTimerEvent(). The parameter ulPeriodV is a multiple of 1 microsecond. This function can be used to overwrite the default value during run-time.