light

设计一个 8 路彩灯控制器，要求实现如下花样： （ 1 ）从左到右逐个亮，从右到左逐个灭； （ 2 ）从两边往中间逐个亮，从中间往两边逐个灭； （ 3 ）重复上面 1 、 2 。 文本文件： module caideng(clk,light,res); input clk,res; output[3:0] light; reg[3:0] state; reg[3:0] light; parameter FIRST=4'd0, A=4'd1, B=4'd2, C=4'd3, D=4'd4, E=4'd5, F=4'd6, G=4'd7, H=4'd8, I=4'd9, J=4'd10, K=4'd11, L=4'd12; always @(posedge clk) begin if(!res) begin state=FIRST; end else casex(state) FIRST:state<=A; A:begin light=4'b1000; state<=B; end B:begin light=4'b1100; state<=C; end C:begin light=4'b1110; state<=D; end D:begin light=4'b1111; state<=E; end E:begin light=4'b1110; state<=F; end F:begin

How to disable/enable a button while doing validation using IDataErrorInfo ? I am using MVVM using GalaSoft light Framework. In my Model class I have implemented IDataErrorInfo to display the error messages. public string this[string columnName] { get { Result = null; if (columnName == "FirstName") { if (String.IsNullOrEmpty(FirstName)) { Result = "Please enter first name"; } } else if (columnName == "LastName") { if (String.IsNullOrEmpty(LastName)) { Result = "Please enter last name"; } } else if (columnName == "Address") { if (String.IsNullOrEmpty(Address)) { Result = "Please enter Address";

When using the light sensor, I have an issue where the onSensorChanged() event is never triggered. The reason is that when the listener is registered, if the lux value remains constant, there's no change thus no event. However, I still want to know the lux value! There's a difference between a constant lux value of 0, and a constant of 60,000! After some research, I realised that there's no way to directly read the lux value of the sensor. So how do I get the lux value if it's constant, and thus will never trigger an event? Is there a way to set a false value initially (such as -1) so an event

I heard that I should use normals instead of colors, because colors are deprecated. (Is that true?) Normals have something to do with the reflection of light, but I can't find a clear and intuitive explanation. What is a normal? A normal in general is a unit vector whose direction is perpendicular to a surface at a specific point. Therefore it tells you in which direction a surface is facing. The main use case for normals are lighting calculations, where you have to determine the angle (or practically often its cosine) between the normal at a given surface point and the direction towards a

So Android M recently came out and it now has a built in cameralight function called setTorchMode. I was curious as to how this worked as the parameters are (String cameraID, Boolean true/false). The Boolean obviously dictates whether the light is on or off, but how do you get the cameraID? I know there's a method called getCameraIDList, but that returns an array of IDs, not just one. How do you know which one in that list to use? You should use CameraManager "getCameraIdList" function which will retrieve you a list of strings where each represent an active camera. if (Build.VERSION.SDK_INT >=

Inside my app, I need a way to turn off the lights on the standard Android phone keys (Home, Menu, Back, and Search) - how can I do this programmatically? According to this page , the hardware key backlights can be controlled by writing to a specific file in the filesystem with superuser privileges (i.e. phone must be "rooted"): Q: How can I control the keyboard backlight? A: The keyboard backlight can be controlled via /sys/class/leds/keyboard-backlight/brightness. It appears that it's a simple on-off control (echoing '0' turns it off, echoing '1' or higher turns it on). For some reason, the