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频率是100HZ；
主循环函数
DelayMS(10);
if(pwm_value == 0) step = 5;
if(pwm_value == 2000) step = -5;
pwm_value += step;
tiM3->CCR1 = pwm_value; file:///C:UsersjohnDocumentsTencent Files46036021ImageGroupFD~K5BE3OE47)A2(L{Y]N~N.jpg
这个不连续 怎么修改？
主循环函数
DelayMS(10);
if(pwm_value == 0) step = 5;
if(pwm_value == 2000) step = -5;
pwm_value += step;
tiM3->CCR1 = pwm_value; file:///C:UsersjohnDocumentsTencent Files46036021ImageGroupFD~K5BE3OE47)A2(L{Y]N~N.jpg
这个不连续 怎么修改？
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