sd fsl k60分章阅读krev6 ch40第40周期中断定时器

位宽PIT_MCR域31-21001地址：PIT_LDVAL0——4003_7000h基址+100h偏移=4003_7100hPIT_LDVAL1——4003_7000h基址+110h偏移=4003_7110hPIT_LDVAL2——4003_7000h基址+120h偏移=4003_7120h域31-地址：PIT_CVAL0——4003_7000h基址+104h偏移=4003_7104hPIT_CVAL1——4003_7000h基址+114h偏移=4003_7114hPIT_CVAL2——4003_7000h基址+124h偏移=4003_7124h域31-地址：PIT_TCTRL0——4003_7000h基址+108h偏移=4003_7108hPIT_TCTRL1——4003_7000h基址+118h偏移=4003_7118hPIT_TCTRL2——4003_7000h基址+128h偏移=4003_7128hPIT_TCTRL3——4003_7000h基址+138h偏移=4003_7138hPIT_TCTRLn域31-1发生，相关的TIF标志必须先清除。0来自定时器n1不论TIF00定时器n1定时器n地址：PIT_TFLG0——4003_7000h基址+10Ch偏移=4003_710ChPIT_TFLG1——4003_7000h基址+11Ch偏移=4003_711ChPIT_TFLG2——4003_7000h基址+12Ch偏移PIT_TFLG3——4003_7000h基址+13Ch偏移域31-0TIF在定时器周期结束时置1。只有在写入1时该标志才被清除。写00时，将产生一个触发脉冲并且置中断标志。所有的中断可以开启或屏蔽（TCTRLTIE位。只有TEN位开启定时器来重启计数周期。（40-23）40-2340-24LDVAL寄存器写入新值而不用重启定时器来改变计数周期。

40-25PITFRZ位将会冻结。这是为了帮助定时器中断可以通过设置TIE位来使能。定时器中断标志(TIF)在相关的定定时器1每隔5.12ms产生一次中断钟频率相当于每个始终周期为20ns。定时器1需要每隔5.12ms/20ns=256000330ms/20ns=1500000个周期。LDVAL0x0003E7FFLDAL位TIE保持0来开启。//turnonPIT//TimerPIT_LDVAL1=0x0003E7FF;//setuptimer1for256000cyclesPIT_TCTRL1=TIE;//enableTimer1interruptsPIT_TCTRL1|=TEN;//startTimer//TimerPIT_LDVAL3=0x0016E35F;//setuptimer3for1500000cyclesPIT_TCTRL3|=TEN;//startTimer30x0003E7FFLDAL3TCTRL1TIE1TCTRL1TEN133TCTRL3寄存器的TEN1，TIE0来开启。//turnonPITPIT_MCR=0x00;//TimerPIT_LDVAL1=0x0003E7FF;//setuptimer1for256000cyclesPIT_TCTRL1=TIE;//enableTimer1interruptsPIT_TCTRL1|=TEN;//startTimer//TimerPIT_LDVA