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配置烧录口PC6 gpio_set_dir(GPIO_PORT_C,GPIO_BIT_6,GPIO_DIR_IN); system_set_port_pull(GPIO_PORT_C,false); system_set_port_mux(GPIO_PORT_C, GPIO_BIT_6, PORTC6_FUNC_C6);
为什么没有实现当作按键检测口？硬件没有加上拉电阻。。现在的问题是IO一直处于高电平