翻译接龙第二期：Using the Touch Screen Controller

斯嘉丽

原帖由morebetter于2008-05-16 16:40发表:
7、The ASP module on the MCF5227x supports resistive type touch screens. Modes of operation are available for the commonly used interfaces — 4-wire, 5-wire, 7-wire, and 8-wire. The following sections discuss how the different types of resistive touch screens work, along with their advantages and disa

 
MCF5227x 就是freescale的产品
 

斯嘉丽

原帖由山东大学南风队于2008-05-20 18:34发表:
1.1 How 4-Wire Resistive Touch Screens Work8、 A 4-wire touch screen is made from two layers, each with a resistive coating. There is a separation between the two layers. The bottom layer is rigid, but the top one is flexible. Both layers have bus bars placed perpendicular to each other. A voltage is

 
这段好像还没有翻译完啦！…………

lemontree-50640

A 4-wire touch screen is made from two layers, each with a resistive coating. There is a separation between the two layers. The bottom layer is rigid, but the top one is flexible. Both layers have bus bars placed perpendicular to each other. A voltage is applied to the bus bars on both sides of a layer and the resistive coating creates a voltage gradient across the plane. The basic idea is to create a voltage divider. Detecting the voltage at the division point (the touch point) allows for calculating the relative position of the touch point with respect to the two rails.
4线触摸屏由2层构成，每层均有电阻涂层，将两层分割开来。其中底层为刚性，上层为柔性。每层的母线互相垂直。当两层母线开始加压，电阻涂层就会通过平面产生电压差。基本思路是建立一个分压器，检测分割点（接触点）电压 ，通过二维数据计算触摸屏上相应触摸点。

lemontree-50640

9、To get the coordinates for a single point, two measurements are needed. First a voltage is applied across the x-axis plane, and the contacts for the y-axis plane are allowed to float. The resistive coating on the touch screen creates a voltage gradient across the plane. If the top layer is pressed, it flexes and makes contact with the bottom layer. The y-axis plane now has a voltage equal to the voltage on the x-axis plane at the point of contact. The voltage on the y-axis plane can be measured and used to obtain the x-coordinate. The process is repeated again to get the y-coordinate. This time the voltage is applied across they-axis plane and the x-axis plane is allowed to float. Then the x-axis voltage is measured and used to calculate the y-coordinate location.
要计算出坐标点需要两个测量前提。首先是电压应用于X轴平面，Y轴平面允许移动，触摸屏电阻涂层能够产生电压梯度差。如果上层接受到压力弯曲与底层产生接触，Y平面上就会产生与X平面接触点相同的电压。通过计算y平面上电压就可以计算出用户在X面上的坐标点。同样的过程在获得Y坐标。此时，电压应用与整个平面，X面允许自由浮动，同时通过测量X轴电压计算出Y坐标位置。

lemontree-50640

lemon tree,lemon tree,I love lemon tree!

yhwyz

南蛮入侵

7、The ASP module on the MCF5227x supports resistive type touch screens. Modes of operation are available for the commonly used interfaces — 4-wire, 5-wire, 7-wire, and 8-wire. The following sections discuss how the different types of resistive touch screens work, along with their advantages and disadvantages

在ASP单元，介绍mcf5227x支持电阻式触摸屏。运作模式，常用接口-四线，五线，七线，八线。以下各节讨论如何依照他们的优缺点按不同类型的电阻触摸屏工作。

南蛮入侵

11.The next step is to get the y-axis coordinate. This time Y+/YU is biased to 3.3 V, and Y–/YD is biased to 0 V. This creates the consistent voltage ramp across the y-axis plane. The pressure from the touch creates a contact point between the two planes so that the x-axis plane goes to 1.65 V. The input voltage is read from the X+/XL wire and used to determine that the y-axis coordinate of the touch point is at 50% of the screen’s height.
11：下一步是求Y轴坐标。这个时候y+/YU偏至3.3v，和y-/yd是偏至0V，这就产生了一个连续的斜坡电压穿过Y轴的平面。在两平面之间，压力从接触部分产生了一个联结点，使X轴的平面达到1.65V，输入电压从X+/xl线读取，并用来确定Y轴坐标触摸点是在50％的屏幕的高度。

南蛮入侵

怎么看不见楼层了???

crazystone-5108

RE:翻译接龙第二期：Using the Touch Screen Controller