Add the following line to "Additional Board Manager URLs" under "Preference",

https://github.com/ambiot/ambd_arduino/raw/master/Arduino_package/package_realtek.com_amebad_index.json

Next, go to “Tools” -> “Board” -> “Boards Manager” to install AmebaD package.

Find “Realtek Ameba Boards (32-bits ARM Cortex-M33 @200MHz)” in the list, click “Install”, then the Arduino IDE starts to download required files for AmebaD.

Take a look at the pin diagram for AMB23

and connect accordingly. 

Busy - D21

Reset - D20

DC - D19

CS - D12

CLK - D11

DIN - D9

The pin numbers definition can be found in epdif.h .

#define RST_PIN         20
#define DC_PIN          19
#define CS_PIN          12
#define BUSY_PIN        21

Do note that Display Config should be set to B and Interface Config should be set to 0. 

Button pin is defined to be D2.

Button setting can be found in ino file.
int button = 2;
int buttonState = 1;

Download the Eink zip library, AmebaEink.zip at https://github.com/ambiot/ambd_arduino/tree/master/Arduino_zip_libraries and install AmebaEink.zip on Arduino IDE. You may follow the instruction at  https://docs.arduino.cc/software/ide-v1/tutorials/installing-libraries to install it. 

Next, insert the MicroSD card into your computer and create a new text file named “User_Ebook.txt”. Then, save the content that you would like to display in the text file (Note: do only include words).  The content of “User_Ebook.txt” shown below is for illustration purposes only. 

Alternatively, if you prefer another filename for your text file, you can modify the highlighted code snippet in the sketch with the new filename.

Once the file is created, insert the MicroSD card into the onboard SD card reader on AMB23. Upload the code and press the reset button once the uploading is done. When reset button is pressed, the e-Paper display will refresh and display a cover page. 

By pressing the button, the content in the selected text file saved in MicroSD card will be read and displayed onto the e-Paper display. The content will be split into pages.

To proceed to the next page, press the button once more. The page number will be shown at the bottom right-hand corner as the page changes. You will see the following in either portrait or landscape mode based on your orientation choice after button is pressed:

You can modify the highlighted code snippet to change the font size or orientation of the displayed text.

Supported font size: 16, 20, 24

Supported orientation: 0 degree - 0 (landscape), 90 degree – 1 (portrait), 180 degree- 2 (landscape), 270 degree – 3 (portrait)