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{{Infobox item
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{{#tweekihide:firstHeading|sidebar-left|sidebar-right}}__NOTOC__
|name=7.5inch e-Paper
 
|img=<div class="tabber"><div class="tabbertab" title="Raw Panel">[[File:7.5inch-e-Paper-1.jpg|300px|link=https://www.waveshare.com/7.5inch-e-paper.htm]]</div>
 
<div class="tabbertab" title="Fully Laminated Ver.">[[File:7.5inch-e-Paper-G-1.jpg|300px|link=https://www.waveshare.com/7.5inch-e-paper-g.htm|7.5inch e-Paper (G)]]</div>
 
<div class="tabbertab" title="With Driver HAT">[[File:7.5inch-e-paper-hat-4.jpg|300px|link=http://www.waveshare.com/7.5inch-e-paper-hat.htm]]</div></div>
 
|category=[[:Category:OLEDs / LCDs|OLEDs / LCDs]], [[:Category:LCD|LCD]]
 
|brand=Waveshare
 
|{{#urlget:amazon|default}}=display
 
|website_cn=[http://www.waveshare.net/shop/7.5inch-e-paper-hat.htm 官方中文站点]
 
|website_en=[http://www.waveshare.com/7.5inch-e-paper-hat.htm Waveshare website]
 
|interface1=SPI
 
|related=
 
{{Product List|OLEDs / LCDs/e-Paper}}
 
}}
 
<div class="tabber">
 
<div class="tabbertab" title="Introduction">
 
= Introduction =
 
 
 
'''Note:''' The raw panel requires a driver board, If you are the first time use this e-Paper, we recommend you to buy the HAT version or buy more one driver hat for easy use, otherwise you need to make the driver board yourself. And this instruction is based on the HAT version.
 
 
 
800x480, 7.5inch EPD(Electronic Paper Display) HAT for Raspberry Pi, SPI interface
 
 
 
<font color="#FF0000">【Version update instructions】:
 
*This product has been updated to V2 version with higher resolution, supporting 800x480 resolution (V1 version has 640x384 resolution)
 
*The hardware structure and interface of V2 version of this product are compatible with V1 version, but the software needs to be updated</font>
 
 
 
{{Amazon|{{#urlget:amazon|default}}=display
 
|More = [http://www.waveshare.com/7.5inch-e-paper-hat.htm More]}}
 
 
 
= Interfaces =
 
{|class="wikitable"
 
|-
 
| VCC || 3.3V
 
|-
 
| GND || GND
 
|-
 
| DIN || SPI MOSI
 
|-
 
| CLK || SPI SCK
 
|-
 
| CS || SPI chip select (Low active)
 
|-
 
| DC || Data/Command control pin (High for data, and low for command)
 
|-
 
| RST || External reset pin (Low for reset)
 
|-
 
| BUSY || Busy state output pin (Low for busy)
 
|}
 
= Working principle =
 
This product is an E-paper device adopting the image display technology of Microencapsulated Electrophoretic Display, MED. The initial approach is to create tiny spheres, in which the charged color pigments are suspending in the transparent oil and would move depending on the electronic charge. The E-paper screen display patterns by reflecting the ambient light, so it has no background light requirement. Under ambient light, the E-paper screen still has high visibility with a wide viewing angle of 180 degrees. It is the ideal choice for E-reading. ('''Note that the e-Paper cannot support updating directly under sunlight''')
 
; Communication protocol
 
----
 
[[File:1.54inch-e-paper-manual-1.png|400px]]
 
  
Note: Different from the traditional SPI protocol, the data line from the slave to the master is hidden since the device only has display requirement.
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<div style="background-color: #343434;text-align: center;color: white;padding: 20px;margin: 8px;">
* CS is slave chip select, when CS is low, the chip is enabled.
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=7.5inch e-Paper HAT Manual=
* 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.
 
SPI communication has data transfer timing, which is combined by CPHA and CPOL.
 
# CPOL determines the level of the serial synchronous clock at idle state. When CPOL = 0, the level is Low. However, CPOL has little effect to the transmission.
 
# CPHA determines data is collected at the first clock edge or at the second clock edge of serial synchronous clock; when CPHL = 0, data is collected at the first clock edge.
 
* There are 4 SPI communication modes. SPI0 is commonly used, in which CPHL = 0, CPOL = 0.
 
As you can see from the figure above, data transmission starts at the first falling edge of SCLK, and 8 bits of data are transferred in one clock cycle. In here, SPI0 is in used, and data is transferred by bits, MSB first.
 
 
</div>
 
</div>
<div class="tabbertab" title="User Guides of Pi">
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<p></p>
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{{ContentGrid|grid-gap=25px
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|content =  
  
We provide several examples for testing, you first test the e-Paper by following the guides. If your developing board is different, you need to write your codes yourself by following the resources.
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{{StudyCard
{{Raspberry Pi Guides for SPI e-Paper}}
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|img=[[File:Start-test1.png|121px|link=https://www.waveshare.com/wiki/7.5inch_e-Paper_HAT_Manual#Overview]]
</div>
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|heading = Introduction
<div class="tabbertab" title="User Guides of Jetson Nano">
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|content = Parameters, principles, and precautions
{{Jetson Nano Guides for SPI e-Paper}}
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}}
</div>
 
<div class="tabbertab" title="User Guides of STM32">
 
{{STM32 Guides for SPI e-Paper}}
 
</div>
 
<div class="tabbertab" title="User Guides of Arduino">
 
{{Arduino Guides for SPI e-Paper}}
 
</div>
 
<div class="tabbertab" title="User Guides of ESP32">
 
{{ESP32 Guides for SPI e-Paper}}
 
</div>
 
<div class="tabbertab" title="User Guides of ESP8266">
 
{{ESP8266 Guides for SPI e-Paper}}
 
</div>
 
<!--
 
=== Display a Frame (DisplayFrame) ===
 
DisplayFrame is used to send a frame to the module, and the screen will refresh and display it.
 
  
Process: Send command data start transmission 1 -> Send data of an image to display -> Refresh the screen.
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{{StudyCard
 +
|img=[[File:Remote-access-test1.png|121px|link=https://www.waveshare.com/wiki/7.5inch_e-Paper_HAT_Manual#Users_Guides_of_Raspberry_Pi]]
 +
|heading = Start with Raspberry Pi
 +
|content = Using BCM2835, WiringPi, file IO, RPI (Python) library development routines and instructions
 +
}}
  
Note:
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{{StudyCard
* About the image data: 4 bits = 1 pixel, doesn’t support Gray scale (can only display black and white). 0000 (binary) stands for a black pixel, otherwise 0011 (binary) stands for a white pixel.
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|img=[[File:Linux-test1.png|121px|link=https://www.waveshare.com/wiki/7.5inch_e-Paper_HAT_Manual#User_Guides_of_Jetson_Nano]]
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|heading = Start with the Jetson Nano
 +
|content = Use C language, Python developed routines and instructions
 +
}}
  
For example:
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{{StudyCard
<pre>
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|img=[[File:Config-test1.png|121px|link=https://www.waveshare.com/wiki/7.5inch_e-Paper_HAT_Manual#User_Guides_of_STM32]]
0x00: 2 pixels ■■
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|heading = Starting from the STM32
0x03: 2 pixels ■□
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|content = Use STM32CubeMX to develop routines based on STM32F103ZET6 and their usage instructions
0x30: 2 pixels □■
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}}
0x33: 2 pixels □□
 
but 0x66: the state of pixels is uncertain
 
</pre>
 
* This module doesn’t support partial refresh.
 
* The refresh rate of this module is slow (about 6s), and it will flicker for several times during refreshing. Please be patient.
 
-->
 
<div class="tabbertab" title="Resources">
 
== Resources ==
 
  
= Documentation =
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{{StudyCard
 +
|img=[[File:Tinker Board 2硬件-test1.png|121px|link=https://www.waveshare.com/wiki/7.5inch_e-Paper_HAT_Manual#User_Guides_of_Arduino]]
 +
|heading = Starting from the Arduino
 +
|content = Routines developed based on Arduino UNO R3 and their usage instructions
 +
}}
  
{{Commom Instruction of SPI e-paper}}
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{{StudyCard
 +
|img=[[File:Linux-test1.png|121px|link=https://www.waveshare.com/wiki/7.5inch_e-Paper_HAT_Manual#Resources]]
 +
|heading = Resources
 +
|content = Documentation, procedures and data sheets, etc
 +
}}
  
* [[:File:E-Paper-Driver-HAT-Schematic.pdf|Schematic]]
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{{StudyCard
 +
|img=[[File:显示屏-test1.png|121px|link=https://www.waveshare.com/wiki/7.5inch_e-Paper_HAT_Manual#FAQ]]
 +
|heading = FAQ
 +
|content = e-Paper frequently asked questions
 +
}}
  
= Demo code =
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{{StudyCard
*[https://github.com/waveshare/e-Paper Github]
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|img=[[File:数据表-test1.png|121px|link=https://www.waveshare.com/wiki/7.5inch_e-Paper_HAT_Manual#Support]]
 +
|heading = Support
 +
|content = Technical support
 +
}}
  
= Datasheets =
+
}}
* [[:File:7.5inch-e-paper-specification.pdf|Datasheet]]
 
* [https://www.waveshare.com/w/upload/6/60/7.5inch_e-Paper_V2_Specification.pdf 7.5inch e-Paper V2 Specification]
 
==Related Resources==
 
Notice:<br />
 
The projects listed are all made and shared by the project owners, Waveshare isn't responsible for project either the update.<br />
 
*[https://forum.arduino.cc/index.php?topic=487007.0 Waveshare e-Paper display with SPI]
 
:This is a post in Arduino Form about our SPI e-Paper thanks to ZinggJM, maybe you want to refer to.
 
*[https://github.com/aceisace/Inkycal Inkycal Project]
 
:This is the Inkycal project for reference.
 
*[https://www.youtube.com/watch?v=OW4GYmzWOb8 Task List using Raspberry Pi 3 and 7.5" E-paper Display]
 
*[https://github.com/aceisace/E-Paper-Calendar-with-iCal-sync-and-live-weather E-Paper Calendar with iCal sync and live weather ]
 
</div>
 
<div class="tabbertab" title="FAQ">
 
= FAQ =
 
<!--{{e-Paper FAQ}}-->
 
{{e-Paper FAQ}}
 
</div>
 
</div>
 
==Support==
 
{{Service00}}
 

Latest revision as of 10:24, 21 July 2022


7.5inch e-Paper HAT Manual

Start-test1.png

Introduction

Parameters, principles, and precautions
Remote-access-test1.png

Start with Raspberry Pi

Using BCM2835, WiringPi, file IO, RPI (Python) library development routines and instructions
Linux-test1.png

Start with the Jetson Nano

Use C language, Python developed routines and instructions
Config-test1.png

Starting from the STM32

Use STM32CubeMX to develop routines based on STM32F103ZET6 and their usage instructions
Tinker Board 2硬件-test1.png

Starting from the Arduino

Routines developed based on Arduino UNO R3 and their usage instructions
Linux-test1.png

Resources

Documentation, procedures and data sheets, etc
显示屏-test1.png

FAQ

e-Paper frequently asked questions
数据表-test1.png

Support

Technical support