Timer

group bsp_timer

High level timing functions on top of the RTC peripheral.

Author

Alexandre Abadie alexandre.abadie@inria.fr

Copyright

Inria, 2022

Typedefs

typedef void (*timer_cb_t)(void)

Callback function prototype, it is called when the timer fires an event.

Functions

void db_timer_init(void)

Configure an RTC timer with millisecond precision.

uint32_t db_timer_ticks(void)

Returns the number of ticks since timer initialization.

Returns:

number of ticks (1 tick ~ 30us)

void db_timer_set_periodic_ms(uint8_t channel, uint32_t ms, timer_cb_t cb)

Set a callback to be called periodically.

Parameters:

• channel – [in] RTC channel used

• ms – [in] periodicity in milliseconds

• cb – [in] callback function

void db_timer_set_oneshot_ticks(uint8_t channel, uint32_t ticks, timer_cb_t cb)

Set a callback to be called once after an amount of ticks (1 tick ~= 30us)

Parameters:

• channel – [in] RTC channel used

• ticks – [in] delay in ticks

• cb – [in] callback function

void db_timer_set_oneshot_ms(uint8_t channel, uint32_t ms, timer_cb_t cb)

Set a callback to be called once after an amount of milliseconds.

Parameters:

• channel – [in] RTC channel used

• ms – [in] delay in milliseconds

• cb – [in] callback function

void db_timer_set_oneshot_s(uint8_t channel, uint32_t s, timer_cb_t cb)

Set a callback to be called once after an amount of seconds.

Parameters:

• channel – [in] RTC channel used

• s – [in] delay in seconds

• cb – [in] callback function

void db_timer_delay_ticks(uint32_t ticks)

Add a delay in ticks (1 tick ~ 30us)

Parameters:

• ticks – [in] delay in ticks

void db_timer_delay_ms(uint32_t ms)

Add a delay in milliseconds.

Parameters:

• ms – [in] delay in milliseconds

void db_timer_delay_s(uint32_t s)

Add a delay in seconds.

Parameters:

• s – [in] delay in seconds