[vc_row][vc_column][vc_column_text]Electronic paper, e-paper and electronic ink are display technologies which are designed to mimic the appearance of ordinary ink on paper. Unlike conventional backlit flat panel displays which emit light, electronic paper displays reflect light like ordinary paper, theoretically making it more comfortable to read, and giving the surface a wider viewing angle compared to conventional displays.  In this tutorial, we will introduce an E-paper shield. This E-paper shield can be programmed using pcDuino or Arduino.

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It’s very simple to use the e-paper, we just need to install it directly on the pcDuino.

[/vc_column_text][/vc_tab][vc_tab title=”Procedure” tab_id=”1400214997-2-74″][vc_column_text]In the following, we will look at the steps  using e-paper shield:

1. First, we need to download a tool named image2lcd. It can be downloaded from (image2lcd_v3.2). This tool is used to generate a header file that contains the data of the image. The size of the image should be exactly 800×600.

The options should be:

Output file type: C array (*c)

Scan mode: Horizon Scan

BitsPixel: 4 gray

Size: 800 x 600

Load the image and then save to array.

2.  Introduction to the commands:

The e-paper shield uses SPI interface to talk to pcDuino. To meet the requirement of speed, please use hardware SPI. The status pin is D9. If the e-paper shield is idle, it will toggle the status of pin D9. If it times out, we can pull high of CS signal to abort the current command.

Note: It may take a long time during image updating.

The following is a sample code:

void ClearScring(void)

[/vc_column_text][/vc_tab][vc_tab title=”Download” tab_id=”1400220505233-2-5″][vc_column_text]1. Sample project files

2. Schematics[/vc_column_text][/vc_tab][/vc_tour][/vc_column][/vc_row]