Difference between revisions of "2.13inch e-Paper HAT"
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[[File:e-paper-spi-timing.jpg|700px]] | [[File:e-paper-spi-timing.jpg|700px]] | ||
| − | + | The e-Paper could only support writing, therefore the MISO pin is hidden. | |
| − | + | ||
| − | + | *CS is slave chip select. When CS is low, the chip is enabled. | |
| − | + | *DC is data/command control pin, when DC = 0, write command, when DC = 1, write data. | |
| − | + | *SCLK is the SPI communication clock. | |
| − | + | *SDIN is the data line from the master to the slave in SPI communication. | |
| − | + | Timing：CPHL=0， CPOL=0 （SPI0）<br /> | |
| + | 【Note】For more information of the SPI, please search online. | ||
==墨水屏刷新原理== | ==墨水屏刷新原理== | ||
Revision as of 18:14, 5 June 2020
Contents
Introduction
This is 2.13inch e-Paper module, 250x122 resolution, SPI interface, supports black and white colors.
Features
- Size： 2.13 inch
- Dimension（Raw panel）：59.2mm × 29.2mm × 1.05mm
- Dimension（PCBA）：65mmx30.2mm
- Display area：48.55mm × 23.71mm
- Operating voltage：3.3V/5V
- Interface：SPI
- Pitch：0.194* 0.194
- Resolution：250*122
- Display colors：Black, White
- Gray scale：2
- Partial update ：0.3s
- Fully update ：2s
- Consumption (refresh) ： 26.4mW(typ.)
- Consumption (standby) ：<=0.017mW
【Notices】：
Update time: The data provided is for reference, the actual time may be different according to the MCU. The e-Paper will flicker when updating, it is normal
Consumption: The data provided is for reference, the actual consumption may be different according to the driver board.
SPI timing
The e-Paper could only support writing, therefore the MISO pin is hidden.
- CS is slave chip select. When CS is low, the chip is enabled.
- DC is data/command control pin, when DC = 0, write command, when DC = 1, write data.
- SCLK is the SPI communication clock.
- SDIN is the data line from the master to the slave in SPI communication.
Timing：CPHL=0， CPOL=0 （SPI0）
【Note】For more information of the SPI, please search online.
墨水屏刷新原理
像素与字节的关系
对于黑白图片，我们可以规定，如果如果是黑色我们定义成0，如果是白色就定义成1，那么有了表示颜色的方式：
白色：□，对应1
黑色：■：对应0
- 一个点在图形上一般称之为像素点（pixel）,而颜色不是1就是0，也就是1个位就可以标识颜色：1Pixel = 1bit，那么一个字节里面就包含了8个像素点。
- 以16个像素点为例，我们假设前8个像素点为黑，后8个像素点为白色，那么可以这么认为，像素点1-16，对应这0位到15位，0表示黑色，1表示白色：
对于计算机而言，它的数据存储方式是高位在前，低位在后，且一个字节只有8个位，因此会有一点改变：
这样只需要2个字节即可表示16个像素点了。
使用说明
资料
文档
程序
数据手册
开发资料
FAQ
1、Working requirements of e-Paper?|
- 【Working】Temperature: 0~50°C; Humidity: 35%~65%RH
- 【Storage】Temperature: ≤30°C; Humidity: ≤55%RH; Max storage time: 6 months
- 【Transport】Temperature: -25~70°C; Max transport time: 10 days
- 【Unpack】Temperature: 20°C±5°C; Humidity: 50%RH±5%RH; Max storage time: Should be assembled in 72h
2、 What do you need to note about e-Paper refreshing
- Refresh mode
- Full refresh: e-Paper flicker when full refreshing to remove ghost image for best display.
- Partial refresh: It doesn't flicker if you use partial refresh (only some of the two-color e-paper support partial refresh). Note that you cannot use Partial refresh all the time, you should full refresh e-paper regularly, otherwise, ghost problem will get worse even damage
- Refresh rate
- When using, you should set the update interval at least 180s. (except Partial supportable types)
- Please set the e-Paper to sleep mode or power off it directly, otherwise, the e-Paper is damaged because of working in high voltage for a long time.
- You need to update the content of three-color e-Paper at least one time every 24h to avoid the burn-in problem.
- Working place
- We recommend you to use the e-Paper indoor. If you need to set the e-paper outdoor, Please place the e-paper in shadow and protect it from UV. When you designed you e-paper product, you should take care about the working situation like temperature, humidity, etc.
3、Why the e-Paper display a black frame？
- You can configure Border Waveform Control register or VCOM AND DATA INTERVAL SETTING register to change the frame.
4、Could the e-Paper work again after sleeping？
- You can use the initial function to wake it up and then update.
