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TI 列程 pfc1ph3ilttpl_nonpowerSUITE_F28004x 无桥PFC测试疑问

Other Parts Discussed in Thread: C2000WARE

导入 c2000\C2000Ware_DigitalPower_SDK_2_00_01_00\solutions\tidm_1007目录下的工程 pfc1ph3ilttpl_nonpowerSUITE_F28004x进行测试:

INCR_BUILD = 1 开环

DC_CHECK = 1 固定占空比测试

问题:

上电后通过示波器查看例程内的测试IO口 GPIO16,可以看到100k 控制频率的 controlISR()已经运行,但是示波器查看PWM2A、PWM3A、PWM4A,要延迟30s后才有输出,每次时间都一样。按照controlISR()内代码,应该上电就有输出。没有找到原因。请专家解释一下,谢谢!