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TMS320F28035: HRPWM的周期频率怎么设置才能更稳

Part Number: TMS320F28035


我使用得是TI得例程《Example_2803xHRPWM_PrdUp_SFO_V6》

芯片时钟60Mhz,设置周期是1500(40kHz),监测出来得频率会抖动,怎么使其稳定,大佬们这个问题要怎么解决,要怎么精准的控制+-1Hz得变动?