Dear All： 1> I found some placeuse two "!!", what's means if(button->gpio != INVALID_GPIO) state = !!((gpio_get_value(button->gpio) ? 1 : 0) ^ button->active_low); else state = !!button->adc_state;
2> is there some MSN group to study linux kernel or discuss it ? Thanks and Best Regards Ben Wu MSN:cray...@yahoo.cn
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