Difference between revisions of "All-in-One Android Touch Screen/zh"

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(接口定义)
(接口定义)
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::{| class="wikitable"
 
::{| class="wikitable"
 
|-
 
|-
| style="background: PaleTurquoise; color: black" colspan="1"| '''Pin#''' || style="background: PaleTurquoise; color: black" colspan="1"| '''Symbol'''|| style="background: PaleTurquoise; color: black" colspan="1"| '''I/O'''|| style="background: PaleTurquoise; color: black" colspan="1"| '''Function'''     
+
| style="background: PaleTurquoise; color: black" colspan="1"| '''Pin#''' || style="background: PaleTurquoise; color: black" colspan="1"| '''Name'''|| style="background: PaleTurquoise; color: black" colspan="1"| '''Function'''     
 
|-
 
|-
|1   || VDD-C-TP  || P ||Power supply input for C-TP
+
|1, 2 || SYS_3.3V  || 3.3V power output, to camera modules
 
|-
 
|-
|2    || GND-C-TP  || P ||Ground for C-TP
+
|7,9,13,15,24 || GND || Gound, 0V
 
|-
 
|-
|3    || RST-C-TP  || I ||Reset C-TP
+
|3    || I2C2_SCL || I2C Clock Signal
 
|-  
 
|-  
|4    || SCL        || I || I2C Clock
+
|4    || I2C2_SDA  || I2C Data Signal
 
|-
 
|-
|5    || SDA        ||I/O|| I2C Data
+
|5    || GPIOE15  || Regular GPIO, control signals output to camera modules
 
|-
 
|-
|6    || INT        || O || Interrupt pin
+
|6    || GPIOE14 || Regular GPIO, control signals output to camera modules
 
|-
 
|-
|7   || GND        || P || Ground
+
|8   || MCLK      || Clock signals output to camera modules
 
|-
 
|-
|8    || GND        || P || Ground
+
|10  || NC || Not Connected
 
|-
 
|-
|9    || GND        || P || Ground
+
|11  || VSYNC || vertical synchronization to CPU from camera modules
|-
+
|10  || VCOM      || P || Common Voltage
+
|-
+
|11  || VDD        || P ||Power Voltage for digital circuit
+
|-
+
|12  || VDD        || P ||Power Voltage for digital circuit
+
|-
+
|13  || RST GLOBAL || I ||Global reset pin
+
|-
+
|14  || STBYB      || I ||Standby mode
+
|-
+
|15  || GND        || P ||Ground
+
|-
+
|16  || RXIN0-    || I ||-LVDS differential data input
+
|-
+
|17  || RXIN0+    || I ||+LVDS differential data input
+
|-
+
|18  || GND        || P ||Ground
+
|-
+
|19  || RXIN1-    || I || -LVDS differential data input
+
|-   
+
|20  || RXIN1+    || I || +LVDS differential data input
+
|-
+
|21  || GND        || P ||Ground
+
|-
+
|22  || RXIN2-    || I ||-LVDS differential data input
+
|-
+
|23  || RXIN2+    || I || +LVDS differential data input
+
|-
+
|24  || GND        || P ||Ground
+
|-
+
|25  || RXCLKIN-  || I ||-LVDS differential clock input
+
|-
+
|26  || RXCLKIN+  || I ||+LVDS differential clock input
+
|-
+
|27  || GND        || P ||Ground
+
|-
+
|28  || RXIN3-    || I ||-LVDS differential data input
+
|- 
+
|29  || RXIN3+    || I ||+LVDS differential data input
+
 
|-  
 
|-  
|30   || GND        || P ||Ground
+
|12   || HREF/HSYNC || HREF/HSYNC signal to CPU from camera modules
|-
+
|31  || GND        || P ||Ground
+
|-
+
|32  || DIMO      || O || Backlight CABC controller signal output
+
|-
+
|33  || SELB      || I || 6/8bit mode select
+
|-
+
|34  || AVDD      || P || Power for Analog Circuit
+
|-
+
|35  || GND        || P || Ground
+
|-
+
|36  || LED-      || P || LED Cathode
+
|-
+
|37  || LED-      || P || LED Cathode
+
|-
+
|38  || L/R        || I || Horiaontal inversion
+
|-
+
|39  || U/D        || I || Vertiacl inversion
+
|-
+
|40  || VGL        || P || Gate OFF Voltage
+
|-
+
|41  || CABCEN1    || I || CABC H/W enable
+
|-
+
|42  || CANCEN0    || I || CABC H/W enable
+
|-
+
|43  || VGH        || P || Gate ON Voltage
+
 
|-
 
|-
|44   || LED+      || P || LED Anode
+
|14   || PCLK      || PCLK signal to CPU from camera modules
 
|-
 
|-
|45  || LED+      || P || LED Anode
+
|16-23 || Data bit7-0 || data signals
 
|}
 
|}
  

Revision as of 07:22, 15 March 2019

English

1 介绍

9inch All-in-One Android Touch Display-1.png
  • All-in-One Android Touch Screen是友善电子设计开发并生产的一款9寸高清电容触摸显示屏,分辨率为1280 x 800,支持触摸,背光可调(通过i2c通讯),特意定做的底板接口适用于友善电子出品的Smart4418、Smart6818核心板,可支持Linux, Android等嵌入式系统,并且驱动开源。
  • 底板使用定制的支架和屏幕固定,没有制作外壳,非常方便企业用户安装到设备中做二次开始使用。

2 机械尺寸图

9inch All-in-One Android Touch Display-pcb.png

3 接口定义

  • HD900(LVDS)接口定义
Pin# Symbol I/O Function
1 VDD-C-TP P Power supply input for C-TP
2 GND-C-TP P Ground for C-TP
3 RST-C-TP I Reset C-TP
4 SCL I I2C Clock
5 SDA I/O I2C Data
6 INT O Interrupt pin
7 GND P Ground
8 GND P Ground
9 GND P Ground
10 VCOM P Common Voltage
11 VDD P Power Voltage for digital circuit
12 VDD P Power Voltage for digital circuit
13 RST GLOBAL I Global reset pin
14 STBYB I Standby mode
15 GND P Ground
16 RXIN0- I -LVDS differential data input
17 RXIN0+ I +LVDS differential data input
18 GND P Ground
19 RXIN1- I -LVDS differential data input
20 RXIN1+ I +LVDS differential data input
21 GND P Ground
22 RXIN2- I -LVDS differential data input
23 RXIN2+ I +LVDS differential data input
24 GND P Ground
25 RXCLKIN- I -LVDS differential clock input
26 RXCLKIN+ I +LVDS differential clock input
27 GND P Ground
28 RXIN3- I -LVDS differential data input
29 RXIN3+ I +LVDS differential data input
30 GND P Ground
31 GND P Ground
32 DIMO O Backlight CABC controller signal output
33 SELB I 6/8bit mode select
34 AVDD P Power for Analog Circuit
35 GND P Ground
36 LED- P LED Cathode
37 LED- P LED Cathode
38 L/R I Horiaontal inversion
39 U/D I Vertiacl inversion
40 VGL P Gate OFF Voltage
41 CABCEN1 I CABC H/W enable
42 CANCEN0 I CABC H/W enable
43 VGH P Gate ON Voltage
44 LED+ P LED Anode
45 LED+ P LED Anode
  • DVP CAM 接口定义
Pin# Name Function
1, 2 SYS_3.3V 3.3V power output, to camera modules
7,9,13,15,24 GND Gound, 0V
3 I2C2_SCL I2C Clock Signal
4 I2C2_SDA I2C Data Signal
5 GPIOE15 Regular GPIO, control signals output to camera modules
6 GPIOE14 Regular GPIO, control signals output to camera modules
8 MCLK Clock signals output to camera modules
10 NC Not Connected
11 VSYNC vertical synchronization to CPU from camera modules
12 HREF/HSYNC HREF/HSYNC signal to CPU from camera modules
14 PCLK PCLK signal to CPU from camera modules
16-23 Data bit7-0 data signals

4 连接使用

9inch All-in-One Android Touch Display-2.png 9inch All-in-One Android Touch Display.png

5 Datasheet下载

6 原理图下载

7 支持的开发板

Debian系统 Android系统 Linux+Qt系统
Smart4418 Smart4418
Tiny4412 Tiny4412

8 关于一线触摸

  • 在大部分的ARM主控板中,我们发现,直接使用CPU自带的ADC转换器并不能很好的支持大尺寸(7寸以上)的四线电阻触摸屏,市面上一般采用更加专业的USB或串口触摸屏扩展模块来解决。为了节省ARM主控芯片的有限资源以及减少外扩,我们专门开发了只使用一个普通GPIO就可以实现专业触摸效果的替代方案,并把它集成到我们的LCD模块驱动板中,我们称之为“一线触摸(1-Wire)”。它的基本原理是,使用一个低成本的MCU连接一个专业的触控芯片(在此我们使用的是ADS7843或兼容芯片),采集并处理四线电阻模拟信号,并把滤波(未校准)后的稳定原始数据通过GPIO送给ARM主控,经我们长期反复测试,即使在19寸这样大的电阻触摸屏上,也可以实现非常精准的触摸效果,不会出现漂移抖动的现象。
  • 另外,当今12寸以内的LCD显示屏,大都采用了LED背光,我们顺便也把背光调节部分也交给MCU来处理,并设置了统一的调节数值区间,最后通过“一线触摸”的GPIO传给ARM主控,这样在ARM端就可以非常方便的来设置背光了。
  • 与此同时,我们还为我们设计开发的每一款带“一线触摸”的LCD模块设置了编号存储在MCU中,这样通过一线通讯读取到的编号,就可以知道这个LCD模块的具体类型了,也就可以在bootloader和内核中自动匹配相应的LCD驱动参数,以此来实现无需修改任何配置,即插即用带”一线触摸”的LCD模块。
  • 在电容触摸LCD模块中,我们则去掉了电阻触控芯片,而保留了背光调节和存储LCD类型编号这2个功能,因此电容触摸通讯依然是标准的I2C接口。
  • 需要注意的是,我们实现的“一线触摸”的通讯,和通常所说的单总线接口是不同的。在ARM主控端内部,我们实际采用了一路pwm timer(不是pwm管脚哦)来实现固定的通讯频率(9600Hz),详细请查看驱动源代码。