關(guān)于SySTick的一些理解及應(yīng)用

己能力有限把，看了奮斗的、戰(zhàn)艦的、神舟的糊里糊涂的，直到看到了野火的一篇文章還有這個(gè)函數(shù)voidSysTick_CLKSourceCo{__IOuint32_tCTRL;/*!<Offset:__IOuint32_tLOAD;/*!<Offset:__IOuint32_tVAL;Offset:0x08SysTickCur__Iuint32_tCALIB;Offset:0x0CSysTickCalibra/*SysTickControl/SysTick_CTRL_COUNTFLAG_Pos16/*!<SysTickCTRL:COUNT#defineSysTick_CTRLSysTick_CTRL_CLKSOURCE_Pos2#defineSysTick_CTRLSysTick_CTRL_TICKINT_Pos1/*!<SysTickCTRL:TISysTick_CTRL_ENABLE_Pos0/*!<SysTickCTRL:EN/*SysTickReloadReSysTick_LOAD_RELOAD_Pos0/*!<SysTickLOAD:RESysTick_LOAD_RELOAD_Pos)/*!<SysTickLOAD:RELO/*SysTickCurrentRegisterDefiniSysTick_VAL_CURRENT_Pos0/*!<SysTickVAL:CURSysTick_VAL_CURRENT_Pos)/*!<SysTickVAL:CURRE/*SysTickCalibrationRegisterDefiniSysTick_CALIB_NOREF_Pos/*!<SysTickCALIB:NSysTick_CALIB_SKEW_Pos0/*!<SysTickCALIB:TSysTick_VAL_CURRENT_Pos)/*!<SysTickCALIB:TEN#defineSysTick_CTRL_CLKSOURCE_Pos2如控制CLKSOURCE需要四個(gè)寄存器位關(guān)于宏定義的就說(shuō)道這里又不懂的大家可static__INLINEuint32_tSys{SysTick->CTRL=SysTick_CT原因可能是“因此，作為一個(gè)連拍式（mult（singleshot）模式，因而必須寫(xiě)入實(shí)際的倒計(jì)SysTick->CTRL=SysTick_CTSysTick_CTRL_TICKINT_Msk|SysTick_CTRL_ENAB{GPIO_InittypedefGPIO_IniRCC_APB2PeriphClockCmd(RCC_APB2Periph_GGPIO_InitStructure.GPIO_Pin=GPIO_InitStructure.GPIO_Speed=GPIO_SpeeGPIO_InitStructure.GPIO_Mode=GPIO_MGPIO_Init(GPIOF,&GPIO_Init}{}{}{//SysTick_CLK