@zhang-haifeng pmu_set_pin_to_PMU(GPIO_PORT_A, 0xFF); pmu_set_pin_to_PMU(GPIO_PORT_B, 0xFF); pmu_set_pin_to_PMU(GPIO_PORT_C, 0xFF); pmu_set_pin_to_PMU(GPIO_PORT_D, 0xFF);将io交给pmu再试试，尽量用未改动的例程测这个