stm8 通用延时函数 能根据时钟自动计算 uS不是很精确-stm8 generic delay function is automatically calculated based on the clock uS not very accurate

STM32通用精确us延时函数；包含标准库和HAL库两种，直接声明调用即可。(STM32 HAL library common precision us delay function; standard library to use as long as the corresponding parameter variable to standard library format can be.)