LibXR::STM32TimerTimebase Class Reference

STM32 硬件定时器时间基准实现 / STM32 timer-based timebase implementation. More...

#include <stm32_timebase.hpp>

Inheritance diagram for LibXR::STM32TimerTimebase:

Collaboration diagram for LibXR::STM32TimerTimebase:

Public Member Functions
	STM32TimerTimebase (TIM_HandleTypeDef *timer)
	构造函数 / Constructor
MicrosecondTimestamp	_get_microseconds ()
	获取当前微秒计数 / Get current timestamp in microseconds
MillisecondTimestamp	_get_milliseconds ()
	获取当前毫秒计数 / Get current timestamp in milliseconds
Public Member Functions inherited from LibXR::Timebase
	Timebase (uint64_t max_valid_us=UINT64_MAX, uint32_t max_valid_ms=UINT32_MAX)
	默认构造函数，初始化全局时间基指针。 Default constructor, initializing the global timebase pointer.

Static Public Attributes
static TIM_HandleTypeDef *	htim = nullptr
	硬件定时器句柄静态指针 / Static pointer to timer handle
Static Public Attributes inherited from LibXR::Timebase
static Timebase *	timebase = nullptr
	静态指针，用于存储全局时间基对象。 Static pointer storing the global timebase instance.

Additional Inherited Members
Static Public Member Functions inherited from LibXR::Timebase
static MicrosecondTimestamp	GetMicroseconds ()
	获取当前时间的微秒级时间戳。 Gets the current timestamp in microseconds.
static MillisecondTimestamp	GetMilliseconds ()
	获取当前时间的毫秒级时间戳。 Gets the current timestamp in milliseconds.
static void	DelayMicroseconds (uint32_t us)
	微秒级延时 / Delay in microseconds

Detailed Description

STM32 硬件定时器时间基准实现 / STM32 timer-based timebase implementation.

Definition at line 39 of file stm32_timebase.hpp.

Constructor & Destructor Documentation

STM32TimerTimebase()

STM32TimerTimebase::STM32TimerTimebase

(

TIM_HandleTypeDef *

timer

)

构造函数 / Constructor

Parameters

timer

定时器句柄指针 / Pointer to timer handle

Definition at line 44 of file stm32_timebase.cpp.

    : Timebase(static_cast<uint64_t>(UINT32_MAX) * 1000 + 999, UINT32_MAX)
{
  htim = timer;
}

Member Function Documentation

_get_microseconds()

MicrosecondTimestamp STM32TimerTimebase::_get_microseconds ( )

virtual

获取当前微秒计数 / Get current timestamp in microseconds

Returns

MicrosecondTimestamp 微秒时间戳 / Microsecond timestamp

Implements LibXR::Timebase.

Definition at line 50 of file stm32_timebase.cpp.

{
  do
  {
    uint32_t tick_old = HAL_GetTick();
    uint32_t cnt_old = __HAL_TIM_GET_COUNTER(htim);
    uint32_t tick_new = HAL_GetTick();
    uint32_t cnt_new = __HAL_TIM_GET_COUNTER(htim);
 
    uint32_t autoreload = __HAL_TIM_GET_AUTORELOAD(htim) + 1;
 
    uint32_t delta_ms = tick_new - tick_old;
    switch (delta_ms)
    {
      case 0:
        return MicrosecondTimestamp(static_cast<uint64_t>(tick_new) * 1000 +
                                    static_cast<uint64_t>(cnt_old) * 1000 / autoreload);
      case 1:
        /* 中断发生在两次读取之间 / Interrupt happened between two reads */
        return MicrosecondTimestamp(static_cast<uint64_t>(tick_new) * 1000 +
                                    static_cast<uint64_t>(cnt_new) * 1000 / autoreload);
      default:
        /* 中断耗时过长（超过1ms），程序异常 / Indicates that interrupt took more than
         * 1ms, an error case */
        continue;
    }
  } while (true);
}

_get_milliseconds()

MillisecondTimestamp STM32TimerTimebase::_get_milliseconds ( )

virtual

获取当前毫秒计数 / Get current timestamp in milliseconds

Returns

MillisecondTimestamp 毫秒时间戳 / Millisecond timestamp

Implements LibXR::Timebase.

Definition at line 79 of file stm32_timebase.cpp.

{ return HAL_GetTick(); }

Field Documentation

htim

TIM_HandleTypeDef * STM32TimerTimebase::htim = nullptr

static

硬件定时器句柄静态指针 / Static pointer to timer handle

Definition at line 65 of file stm32_timebase.hpp.

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The documentation for this class was generated from the following files:

• driver/st/stm32_timebase.hpp
• driver/st/stm32_timebase.cpp