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Button_led_device.c
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Through the development board buttons to control the specific lights on the board of the light16.LED operation 16.1 ; load driving module, lights all the lights; ; unloading driver module to shut down all the lights; 16.2 hardware features GPC1_3: output 1 output 0, turn off the lights, lights, GPC1_4: 1 output, output 0, turn on the lights, turn off the lights 16.3 drive frame design , the entrance function of the driver module, the light is turned on. export function of the drive module, off the lamp the 16.4 kernel provides the standard API operation of the GPIO ; gpio_request: for the kernel to apply for GPIO resources gpio_direction_output: GPIO o
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