WebFeb 15, 2024 · unsigned long t1 = DWT->CYCCNT; /* do something */ unsigned long t2 = DWT->CYCCNT; unsigned long diff = t2 - t1; It counts the elapsed cpu cycles, you have to divide it with the cpu clock frequency to get a value in seconds. As it's a 32 bit value, it can overflow quite fast at higher clock frequencies, e.g in 19.88 seconds at 216 MHz.
HAL——学习SysTick - wdliming - 博客园
WebJun 4, 2024 · The ST Hal makes extensive use of the HAL_Delay and HAL_GetTick for timing out operations. Normally, these functions use the SysTick interrupt to increment … WebApr 20, 2024 · 如果HAL_GetTick()溢出而next_tick尚未溢出,则长时间内HAL_GetTick() 如果HAL_GetTick()尚未溢出而next_tick溢出,则在HAL_GetTick()溢出之前,HAL_GetTick()>next_tick,定时任务将不停执行。 问题1不是必现的,如果led_loop每毫秒都执行一次,就没问题。 refresh email in outlook
关于GetTickCount的溢出问题-CSDN社区
WebFeb 16, 2024 · HAL_Delay不是FreeRTOS函数, _osDelay是围绕FreeRTOS函数构建的函数。 (acc @Clifford: )它们都是不同开发人员出于不同目的而完全不同的功能。. osDelay是CMSIS 库的一部分,在内部使用vTaskDelay()来引入延迟,区别在于osDelay的输入参数是以毫秒为单位的延迟时间,而 _vTaskDelay() 的输入参数是要延迟的 Tick 数。 Web举例如下:. 1)要延迟10ms,即Delay = 10(此处,wait有个初始判断+1,可以不用关注,延迟11ms,Delay = 11). 2)第一种情况,不存在uwTick溢出,调用HAL_Delay时,tickstart获取的tick假设是30000,然后当uwTick到30011时延迟结束. 3)第二种情况,存在uwTick溢出,调用HAL_Delay时 ... WebApr 11, 2024 · 本文目录索引1,高中英语选修6单词表2,牛津高中英语必修5,6单词表3,急求牛津译林版高一英语单词表4,六年级上册英语单元词汇表打星号的... refresh enchantments minecraft