CCIF标志位置1问题~~求大神帮忙

小萨

[mw_shl_code=c,true]TIM2 -> PSC = 16000; TIM2 -> ARR = 300; TIM2 -> CCR1 = 100; TIM2 -> CCR2 = 100; TIM2 -> CCR3 = 100; TIM2 -> CCR4 = 100; TIM2 -> CCMR1 |= 0x6060; TIM2 -> CCMR2 |= 0x6060; TIM2 -> CCER |= 0x1111; TIM2 -> BDTR |= 0x8000; TIM2 -> CR1 = 1; TIM3 -> PSC = 16000; TIM3 -> ARR |= 0xffff; TIM3 -> CCMR1 |= 0x0001; TIM3 -> CCMR2 |= 0x0001; TIM3 -> CCER |= 0x0101; TIM3 -> BDTR |= 0x8000; TIM3 -> CR1 = 1; while(1){ chprintf(chp, "%d \n\r", temp); while(!(TIM3 -> SR & 0x0008)); chprintf(chp, "success SR=%x\n\r", TIM3 -> SR); TIM3 -> SR &= 0x0; chThdSleepMilliseconds(3); chprintf(chp, "one SR=%x\n\r", TIM3 -> SR); chThdSleepMilliseconds(3); chprintf(chp, "two SR=%x\n\r", TIM3 -> SR); temp++; } [/mw_shl_code]

其中chprintf是输出函数，chThdSleepMilliseconds(3);是毫秒级延时

可是为什么我的CC3IF总是不断的被置1

小萨

找到原因了，第一是tim的时钟搞错了，第二如果直接连到高电平的时候，捕获好几次的话，应该是抖动造成的，在示波器下，抖动很厉害，第三：我一开始的时候用的逻辑分析仪，当然是比较便宜的那种，有干扰。