mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-11-27 06:50:21 +00:00
126 lines
3.4 KiB
C
126 lines
3.4 KiB
C
/**
|
|
* @file kernel.h
|
|
* Furi Kernel primitives
|
|
*/
|
|
#pragma once
|
|
|
|
#include <core/base.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/** Check if CPU is in IRQ or kernel running and IRQ is masked
|
|
*
|
|
* Originally this primitive was born as a workaround for FreeRTOS kernel primitives shenanigans with PRIMASK.
|
|
*
|
|
* Meaningful use cases are:
|
|
*
|
|
* - When kernel is started and you want to ensure that you are not in IRQ or IRQ is not masked(like in critical section)
|
|
* - When kernel is not started and you want to make sure that you are not in IRQ mode, ignoring PRIMASK.
|
|
*
|
|
* As you can see there will be edge case when kernel is not started and PRIMASK is not 0 that may cause some funky behavior.
|
|
* Most likely it will happen after kernel primitives being used, but control not yet passed to kernel.
|
|
* It's up to you to figure out if it is safe for your code or not.
|
|
*
|
|
* @return true if CPU is in IRQ or kernel running and IRQ is masked
|
|
*/
|
|
bool furi_kernel_is_irq_or_masked(void);
|
|
|
|
/** Check if kernel is running
|
|
*
|
|
* @return true if running, false otherwise
|
|
*/
|
|
bool furi_kernel_is_running(void);
|
|
|
|
/** Lock kernel, pause process scheduling
|
|
*
|
|
* @warning This should never be called in interrupt request context.
|
|
*
|
|
* @return previous lock state(0 - unlocked, 1 - locked)
|
|
*/
|
|
int32_t furi_kernel_lock(void);
|
|
|
|
/** Unlock kernel, resume process scheduling
|
|
*
|
|
* @warning This should never be called in interrupt request context.
|
|
*
|
|
* @return previous lock state(0 - unlocked, 1 - locked)
|
|
*/
|
|
int32_t furi_kernel_unlock(void);
|
|
|
|
/** Restore kernel lock state
|
|
*
|
|
* @warning This should never be called in interrupt request context.
|
|
*
|
|
* @param[in] lock The lock state
|
|
*
|
|
* @return new lock state or error
|
|
*/
|
|
int32_t furi_kernel_restore_lock(int32_t lock);
|
|
|
|
/** Get kernel systick frequency
|
|
*
|
|
* @return systick counts per second
|
|
*/
|
|
uint32_t furi_kernel_get_tick_frequency(void);
|
|
|
|
/** Delay execution
|
|
*
|
|
* @warning This should never be called in interrupt request context.
|
|
*
|
|
* Also keep in mind delay is aliased to scheduler timer intervals.
|
|
*
|
|
* @param[in] ticks The ticks count to pause
|
|
*/
|
|
void furi_delay_tick(uint32_t ticks);
|
|
|
|
/** Delay until tick
|
|
*
|
|
* @warning This should never be called in interrupt request context.
|
|
*
|
|
* @param[in] tick The tick until which kerel should delay task execution
|
|
*
|
|
* @return The furi status.
|
|
*/
|
|
FuriStatus furi_delay_until_tick(uint32_t tick);
|
|
|
|
/** Get current tick counter
|
|
*
|
|
* System uptime, may overflow.
|
|
*
|
|
* @return Current ticks in milliseconds
|
|
*/
|
|
uint32_t furi_get_tick(void);
|
|
|
|
/** Convert milliseconds to ticks
|
|
*
|
|
* @param[in] milliseconds time in milliseconds
|
|
* @return time in ticks
|
|
*/
|
|
uint32_t furi_ms_to_ticks(uint32_t milliseconds);
|
|
|
|
/** Delay in milliseconds
|
|
*
|
|
* This method uses kernel ticks on the inside, which causes delay to be aliased to scheduler timer intervals.
|
|
* Real wait time will be between X+ milliseconds.
|
|
* Special value: 0, will cause task yield.
|
|
* Also if used when kernel is not running will fall back to `furi_delay_us`.
|
|
*
|
|
* @warning Cannot be used from ISR
|
|
*
|
|
* @param[in] milliseconds milliseconds to wait
|
|
*/
|
|
void furi_delay_ms(uint32_t milliseconds);
|
|
|
|
/** Delay in microseconds
|
|
*
|
|
* Implemented using Cortex DWT counter. Blocking and non aliased.
|
|
*
|
|
* @param[in] microseconds microseconds to wait
|
|
*/
|
|
void furi_delay_us(uint32_t microseconds);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|