Timer2 Mode0 ticks to duration/frequency convertions

ticks to frequency conversions
Timer ticks to overlow frequency and vice versa convertions
#define	timer2_mode0_ticks_to_Hz(ticks)   (timer_ticks_to_Hz(ticks, get_timer2_clock_divider(), get_frequency_divider_scale()))
	Convert ticks to timer frequency for timer2 multiplied by 100.
#define	timer2_mode0_Hz_to_ticks(frequency)   (timer_Hz_to_ticks(frequency, get_timer2_clock_divider(), get_frequency_divider_scale()))
	Converts frequency to ticks for timer2 mode0.

ticks to duration conversions
Timer ticks to timer overlow duration and vice versa convertions
#define	timer2_mode0_ticks_to_ms(ticks)   (timer_16bit_ticks_to_ms(ticks, get_timer2_clock_divider(), get_frequency_divider_scale()))
	Convert ticks count to ms.
#define	timer2_mode0_ms_to_ticks(ms)   (timer_ms_to_ticks(ms, get_timer2_clock_divider(), get_frequency_divider_scale()))
	Convert milliseconds to timer2 ticks.

timer start for frequency and ms
Start Timer for ms or frequency
#define	timer2_mode0_start_ms(ms)
	Start timer2 in mode 0 with ms duration.
#define	timer2_mode0_start_Hz(freq)
	Start timer2 in mode 0 with Hz frequency.

Detailed Description

Functions and data structures for converting timer2 ticks to duration/frequency and vice versa.

Author

Michael Golovanov

Macro Definition Documentation

timer2_mode0_Hz_to_ticks

#define timer2_mode0_Hz_to_ticks

(

frequency

)

(timer_Hz_to_ticks(frequency, get_timer2_clock_divider(), get_frequency_divider_scale()))

Converts frequency to ticks for timer2 mode0.

Call this method after timer2 is initialized and MCU clock frequency divider scale is set.

Warning

On ticks uint16_t overflow returns 0

Parameters

frequency

uint32_t frequency value in Hz. Should not be 0;

Returns

uint16_t timer2 ticks corresponding to given frequency value or 0 on result overflow

timer2_mode0_ms_to_ticks

#define timer2_mode0_ms_to_ticks

(

ms

)

(timer_ms_to_ticks(ms, get_timer2_clock_divider(), get_frequency_divider_scale()))

Convert milliseconds to timer2 ticks.

This routine doesnt check overflows. Its unsafe.

Parameters

ms	uint16_t ms to convert

Returns

uint16_t ticks count for milliseconds

timer2_mode0_start_Hz

#define timer2_mode0_start_Hz

(

freq

)

Value:

do                                                      \
{                                                       \
    uint16_t ticks = timer2_mode0_Hz_to_ticks(freq);    \
    timer2_mode0_start(ticks);                          \
} while (0);

Start timer2 in mode 0 with Hz frequency.

Parameters

freq	uint32_t timer overflow frequency in Hz

timer2_mode0_start_ms

#define timer2_mode0_start_ms

(

ms

)

Value:

do                                                      \
{                                                       \
    uint16_t ticks = timer2_mode0_ms_to_ticks(ms);      \
    timer2_mode0_start(ticks);                          \
} while (0);

Start timer2 in mode 0 with ms duration.

Parameters

ms	uint16_t timer overflow duration

timer2_mode0_ticks_to_Hz

#define timer2_mode0_ticks_to_Hz

(

ticks

)

(timer_ticks_to_Hz(ticks, get_timer2_clock_divider(), get_frequency_divider_scale()))

Convert ticks to timer frequency for timer2 multiplied by 100.

The output frequency = (SYSclk/timer_clock_divider)/((65536-ticks) * 2).

Call this method after timer2 is initialized and MCU clock frequency divider scale is set.

Parameters

ticks

uint16_t timer ticks count to covert

Returns

uint32_t frequency multiplied by 100 corresponding to ticks count

timer2_mode0_ticks_to_ms

#define timer2_mode0_ticks_to_ms

(

ticks

)

(timer_16bit_ticks_to_ms(ticks, get_timer2_clock_divider(), get_frequency_divider_scale()))

Convert ticks count to ms.

This method doesnt analyze corner cases and overflow of result. Be careful.

Parameters

ticks

uint16_t ticks count

Returns

milliseconds time corresponing to timer ticks