修改心跳灯的闪烁方式，本次以更换为秒闪为例：

1.修改设备树

设备树路径：packages/linux/linux/arch/arm64/boot/dts/freescale/OK1028A-C.dts

        leds {
                compatible = "gpio-leds";
                pinctrl-names = "default";
                user {
                        label = "heartbeat";
                        gpios = <&gpio2 6 0>;
                        default-state = "on";
                        linux,default-trigger = "Timer";
                };
        };

 

2.在内核中打开对应的触发器

3.重新编译生成新的设备树和内核，重新烧写即可。