[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fBS5j2VJjiiMfAprsrgLYQU7OltjOFVlTrvAZBTIx5Ww":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":14,"related":15,"source":25,"type":26},[],"2025-12-24 21:28:22",284720873,[8,9],"计数值从0加到自动重装载器初值","计数值从自动重装载器初值减到0",{"courseId":11,"courseImg":12,"courseName":13},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","如果计数模式TIM_CounterMode设置成TIM_CounterMode_Down ,则什么时候产生中断",[16,27,35,40,47,56,65,70,73,82],{"answer":17,"createTime":5,"id":18,"options":19,"question":24,"source":25,"type":26},[],284720866,[20,21,22,23],"2","3","4","5","STM32最多有几个DMA控制器","v1",0,{"answer":28,"createTime":5,"id":29,"options":30,"question":34,"source":25,"type":26},[],284720867,[31,32,33,23],"6","7","8","DMA1有几个通道",{"answer":36,"createTime":5,"id":37,"options":38,"question":39,"source":25,"type":26},[],284720868,[23,31,32,33],"DMA2有几个通道",{"answer":41,"createTime":5,"id":42,"options":43,"question":46,"source":25,"type":26},[],284720869,[44,45],"0","1","寄存器SysTick->CTRL的bit2为()表示使用外部时钟源",{"answer":48,"createTime":5,"id":49,"options":50,"question":55,"source":25,"type":26},[],284720870,[51,52,53,54],"0-1000","0-600","0-65535","0-900","预分频系数的取值范围是()",{"answer":57,"createTime":5,"id":58,"options":59,"question":64,"source":25,"type":26},[],284720871,[60,61,62,63],"1ms","1s","10ms","0.5ms","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff0a82eda0fac3257b23d7bad5876a2a3.png\"> 这个公式中:如果Tclk为72MHz,TIM_Period=999,TIM_Prescaler=71,定时器中断周期为多少",{"answer":66,"createTime":5,"id":67,"options":68,"question":69,"source":25,"type":26},[],284720872,[8,9],"如果计数模式TIM_CounterMode设置成TIM_CounterMode_Up ,则什么时候产生中断",{"answer":71,"createTime":5,"id":6,"options":72,"question":14,"source":25,"type":26},[],[8,9],{"answer":74,"createTime":5,"id":75,"options":76,"question":81,"source":25,"type":26},[],284720874,[77,78,79,80],"TIM2_UP_IRQHandler","TIM1_UP_IRQHandler","TIM3_UP_IRQHandler","TIM4_UP_IRQHandler","定时器1的中断服务函数是()",{"answer":83,"createTime":5,"id":84,"options":85,"question":88,"source":25,"type":26},[],284720875,[86,87],"如果定时器中断触发","如果定时器中断没触发","if(TIM_GetITStatus(TIM1,TIM_IT_Update) == SET)执行的是什么判断"]